MC33369 through MC33374 monolithic high voltage power switching regula
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High Voltage Power Switching Regulator
MC33369 through MC33374 monolithic high voltage power switching regulators that combine required converter functions with unique programmable state controller, allowing simple economical powersystem solution office automation, consumer, industrial products. These devices designed operate directly from rectified line source, flyback converter applications capable providing output power excess with fixed input excess with variable input that ranges from This device series features programmable state controller, on-chip SENSEFETpower switch circuit, active off-line startup circuit including high voltage JFET voltage MOSFET, auto restart logic, fixed frequency duty cycle controlled oscillator, current limiting comparator with leading edge blanking, latching pulse width modulator double pulse suppression, high gain amplifier with bandgap reference. Protective features include cycle-by-cycle current limiting, input undervoltage lockout with hysteresis, non-latching thermal shutdown. These devices available economical 8-pin dual-in-line five TO-220 style packages. Programmable State Controller
MC33369 thru MC33374
Order this document MC33370/D
HIGH VOLTAGE OFF-LINE POWER SWITCHING REGULATOR
SEMICONDUCTOR TECHNICAL DATA
SUFFIX PLASTIC PACKAGE CASE
Power Switch Ground Ground Ground
Feedback Input Ground State Control Input
SUFFIX PLASTIC PACKAGE CASE 314D
On-Chip SENSEFET Power Switch Circuit Rectified Line Source Operation from On-Chip Active Off-Line Start-Up Circuit Latching Double Pulse Suppression Cycle-By-Cycle Current Limiting Input Undervoltage Lockout with Hysteresis Non-Latching Internal Thermal Shutdown Enhanced Functionality Over TOP200 TOP221 Series Typical Application
Input Power Supply Feedback Programmable State Controller Feedback Input Pulse Width Modulator Controller Startup Circuit Snubber Output Device SUFFIX PLASTIC PACKAGE CASE 314E
Feedback Input Ground State Control Input Power Switch Heatsink surface connected
ORDERING INFORMATION
Power Switch Circuit Peak Resistance Current Package
Power Switch
MC33369P MC33370P MC33371P MC33372P MC33373AP MC33369T MC33370T MC33371T MC33372T MC33373T MC33374T MC33369TV MC33370TV MC33371TV MC33372TV MC33373TV MC33374TV
Motorola, Inc. 1999
Plastic DIP-8
State Control Input Power Switch Circuit On/Off
Straight Lead
Ground
Vertical Mount
This device contains active transistors.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
MAXIMUM RATINGS
Power Switch Start-Up Circuit (Pin Voltage Range Current Peak During Transformer Saturation Power Supply Voltage Range (Pin Feedback Input (Pin Voltage Range Current State Control Input Current (Pin I5(pk) -0.3 Ilim -0.3 -0.3 VIR(fb) Thermal Characteristics Suffix, Plastic Package Case Junction-to-Lead Junction-to-Air, printed circuit copper clad 0.36 inch inch Suffix, Plastic Package Case Junction-to-Case Junction-to-Air Operating Junction Temperature Storage Temperature °C/W Characteristic Symbol fOSC OSCILLATOR Frequency (Ifb 25°C Tlow Thigh AMPLIFIER COMPARATOR (Pin Feedback Input Shunt Regulation (Ifb Tlow Thigh) Voltage Voltage Temperature Coefficient Feedback Input (Ifb Resistance 25°C) Resistance Temperature Coefficient Tlow Thigh) Feedback Input Current Threshold Duty Cycle Reduction MC33369, MC33370 MC33371 MC33372 MC33373A, MC33373 MC33374 Amplifier/PWM Gain (Ifb Gain 25°C) Gain Temperature Coefficient Tlow Thigh)
Rating
Symbol
Value
Unit
+150 Tstg +150 ELECTRICAL CHARACTERISTICS (Pin connected typical values 25°C, min/max values operating junction temperature range that applies (Note unless otherwise noted.) Unit
DVreg(fb)
Vreg(fb)
0.005
%/°C
%/°C
Ith(PWM)
-0.05
%/mA %/°C
Duty Cycle Maximum (Ifb ICC1) Minimum (Ifb SHUTDOWN LATCH External Shutdown Activation, Current into Latch Power-Up Reset Threshold, Voltage Reset Latch STATE CONTROL (Pin Input Open Circuit Voltage (Ifb Comparator (VCC Vreg(fb)) Threshold Voltage Input Clamp Voltage (Iin Input Clamp Current (Vin Toggle Comparator (VCC Vreg(fb)) Threshold Voltage (Vin Decreasing) Hysteresis (Vin Increasing) Input Current (Vin Input Reset Current (VCC Vrst,
D(max) D(min) Vrst
Voc(st)
3.55
Vth(st) Vclmp(st) Iin(st) Vth(tg) VH(tg) Iin(tog) Irst(st)
MOTOROLA ANALOG DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Pin connected typical values 25°C, min/max values
operating junction temperature range that applies (Note unless otherwise noted.) CURRENT LIMIT THERMAL PROTECTION Current Limit Threshold (Note 25°C) MC33369 MC33370 MC33371 MC33372 MC33373A MC33373 MC33374 Propagation Delay, Current Limit Threshold Power Switch Circuit Output (Leading Edge Blanking plus Current Limit Delay) POWER SWITCH CIRCUIT (Pin Resistance MC33369, MC33370 25°C 125°C MC33371 25°C 125°C MC33372 25°C 125°C MC33373A 25°C 125°C MC33373 25°C 125°C MC33374 25°C 125°C Breakdown Voltage (I5(off) 25°C) Off-State Leakage Current 25°C 125°C Switching Characteristics Ilim) Turn-on Time (90% 10%) Turn-off Time (10% 90%) Thermal Protection (Note Shutdown (Junction Temperature Increasing) Hysteresis (Junction Temperature Decreasing) Characteristic
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
R5,3(on)
Symbol
V(BR)5 I5(off)
tPLH
Ilim
toff
0.44
0.56
14.5
13.5
Unit
MC33369 thru MC33374
ELECTRICAL CHARACTERISTICS (continued) (Pin connected typical values 25°C, min/max values
operating junction temperature range that applies (Note unless otherwise noted.) Characteristic STARTUP CONTROL (Pin Undervoltage Lockout Start-Up Threshold (VCC Increasing) Minimum Operating Voltage After Turn-On Hysteresis Start-Up Circuit Output Current (Pin Auto Restart (CPin Duty Cycle Frequency TOTAL DEVICE (Pin Power Supply Current After UVLO Turn-On Power Switch Circuit Enabled MC33369, MC33370 MC33371 MC33372 MC33373A, MC33373 MC33374 Power Switch Circuit Disabled Symbol Unit
VCC(on) VCC(min) Istart Drst frst ICC1 ICC2 0.65 0.95
NOTES: Maximum Package power dissipation limits must observed. Tested junction temperature range MC33370 series: Tlow -40°C Thigh +125°C 3.Guaranteed design only. 4.Adjust di/dt reach Ilim
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
NORMALIZED OSCILLATOR FREQUENCY (kHz)
Figure Oscillator Frequency Change versus Temperature
STATE CONTROL INPUT CURRENT (mA)
Figure State Control Input Current versus Input Voltage
25°C Input Zener Clamp
Input Open Circuit Voltage -1.0
Input Transistor Clamp
CASE TEMPERATURE (°C)
Vin, STATE CONTROL INPUT VOLTAGE
Figure State Control Input Threshold Voltage versus Temperature
INPUT THRESHOLD VOLTAGE Comparator Threshold, Increasing Toggle Comparator Hysteresis, Increasing Toggle Comparator Threshold, Decreasing INPUT VOLTAGE
Figure State Control Input Open Circuit Clamp Voltages versus Temperature
Input Zener Clamp Voltage
Input Clamp Voltage
Input Open Circuit Voltage
CASE TEMPERATURE (°C)
CASE TEMPERATURE (°C)
Figure Power Switch Circuit Output Duty Cycle versus Feedback Input Current
FEEDBACK INPUT CURRENT (mA) Threshold Duty Cycle Reduction Auto Restart Hysteretic Operation OUTPUT DUTY CYCLE Connected 25°C MC33369/ MC33370
Figure Feedback Input Current versus Input Voltage
Connected 25°C Input Resistance
MC33374
DVFB DIFB
Power Supply Current After UVLO Turn-On
IFB, FEEDBACK INPUT CURRENT (mA)
VFB, FEEDBACK INPUT VOLTAGE
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
reg(fb), SHUNT REGULATION VOLTAGE FEEDBACK CURRENT (mA) STARTUP MINIMUM OPERATING VOLTAGE
Figure Feedback Input Shunt Regulation Voltage Current versus Temperature
Connected Feedback Input Current Power Switch Circuit Output Duty Cycle
Figure Undervoltage Lockout Thresholds versus Temperature
Startup Threshold Voltage, Increasing
Shunt Regulator Voltage
Minimum Operating Voltage, Decreasing
CASE TEMPERATURE (°C)
CASE TEMPERATURE (°C)
Figure Start-Up Circuit Current versus Voltage
Istart START-UP CIRCUIT CURRENT (mA) Current Into Current Tcase 25°C VOLTAGE 1000 Istart START-UP CIRCUIT CURRENT (mA)
Figure Start-Up Circuit Current versus Power Supply Voltage
Current Into Current VCC, POWER SUPPLY VOLTAGE Tcase 25°C
Ilim NORMALIZED CURRENT LIMIT THRESHOLD
Figure Power Switch Circuit Current Limit Threshold versus Temperature
IPK, NORMALIZED PEAK CURRENT Adjusted Initial
Figure Power Switch Circuit Peak Current versus Current Rate Change
V5(off) Tcase 25°C MC33369/ MC33370 MC33371 MC33372 MC33373A/ MC33373/ MC33374
CASE TEMPERATURE (°C)
DI/Dt, CURRENT RATE CHANGE (A/ms)
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
R5,3(on) NORMALIZED ON-RESISTANCE
Figure Power Switch Circuit Current versus Voltage
Tcase 25°C CURRENT MC33372 MC33371 MC33369/ MC33370 VOLTAGE MC33374 MC33373 MC33373A
Figure Normalized Power Switch Circuit On-Resistance versus Temperature
CASE TEMPERATURE (°C)
5(off) OFF-STATE CURRENT
Figure Power Switch Circuit Off-State Current versus Voltage
COSS, CAPACITANCE (pF) Power Sequence: Start-Up Circuit Turn Power Switch Circuit Turn Measure Current Power Switch Circuit Breakdown Voltage Tcase 150°C Tcase -50°C Start-Up Circuit Bias Current Tcase 25°C 1000
Figure Power Switch Circuit Capacitance versus Voltage
Power Sequence: Start-Up Circuit Turn Power Switch Circuit Turn Measure Capacitance MC33373A MC33372 MC33371 Tcase 25°C COSS measured with mVpp MC33369/ MC33370
MC33374 MC33373
1000
VOLTAGE
VOLTAGE
Figure Function Description
This positive supply voltage input. During startup, power supplied this input from When reaches UVLO upper threshold, Start-Up circuit turns power supplied from auxiliary transformer winding. This Shunt Regulator/Amplifier input used duty cycle control Power Switch circuit. threshold normally connects converter output, voltage that represents converter output. This control circuit Power Switch circuit ground. part integrated circuit lead frame electrically common metal heatsink tab. This multifunction input that designed interface with small number external components implement various methods converter on/off control. Feedback Input Ground State Control Input Power Switch This designed directly drive converter transformer primary, internally connects Power Switch circuit Start-Up circuit.
Function
Description
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Representative Block Diagram
Line Input Auxiliary Power Supply Feedback Feedback Input Auto Restart Timing/ Loop Compensation/ Power Supply Bypass Oscillator Duty Cycle Latch Clock Ramp Filter Comparator Minimum On-Time Delay Leading Edge Blanking Shunt Regulator/ Amplifier Thermal Shutdown Power-Up Reset External Shutdown Undervoltage Lockout Power Switch Start-Up Circuit State Control Input Internal Bias State Control Shutdown Latch Driver On/Off Toggle Power Switch Circuit Converter Output Snubber
Divide
Current Limit Comparator
Ground
Figure Pulse Width Modulation Timing Diagram
Feedback Input (Rfb Voltage) Oscillator Ramp
Oscillator Duty Cycle
Oscillator Clock Comparator Output
Latch Output Power Switch Circuit Gate Drive Leading Edge Blanking Input (Power Switch Circuit Current) Minimum On-Time
Current Limit Propagation Delay Current Limit Threshold
Normal Operating Range
Output Overload
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
OPERATING DESCRIPTION
Introduction MC33369 thru MC33374 represent higher level integration providing single monolithic chip active power, control, logic, protection circuitry required implement high voltage flyback, forward, boost, buck converter. This device series designed direct operation from rectified line source requires minimal external components complete cost sensitive converter solution. Potential markets include office automation, industrial, residential, personal computer, consumer. description each functional blocks given below, representative block diagram shown Figure Oscillator Oscillator block consists comparators that alternately gate trimmed current source current sink which used respectively charge discharge on-chip timing capacitor between voltage levels. This configuration generates precise linear sawtooth ramp signal that used pulse width modulate MOSFET Power Switch circuit. During charge timing capacitor, Oscillator duty cycle output holds input Driver low. This action keeps MOSFET Power Switch circuit off, thus limiting maximum duty cycle. Oscillator frequency internally programmed operation with controlled charge discharge current ratio that yields maximum duty cycle 74%. Oscillator temperature characteristics shown Figure Comparator Latch pulse width modulator (PWM) consists comparator with Oscillator ramp output applied inverting input, while Amplifier output applied into noninverting input. Oscillator clock output applies pulse Latch when timing capacitor reaches peak voltage, initiating Power Switch circuit conduction. timing capacitor discharges, ramp voltage decreases level that less than Amplifier output, causing Comparator reset latch terminate Power Switch circuit conduction duration ramp-down period. This method having Oscillator Comparator reset Latch prevents possibility multiple output pulses during given Oscillator clock cycle. This circuit configuration commonly referred double pulse suppression logic. timing diagram shown Figure that illustrates behavior pulse width modulator. Shunt Regulator/Amplifier Feedback Input, connects internal Shunt Regulator/Amplifier. This input used means close feedback loop converter output regulation. internal circuitry consists Amplifier with precise threshold that drives MOSFET manner that forms active Shunt Regulator. initial current that flows into used bias internal circuitry. additional current excess flows into shunted through resistor ground. voltage developed across used adjust Comparator threshold, which turn controls duty cycle. duty cycle inversely proportional input current level that excess about reduced rate about -14% refer Figure pass filter placed between input. This filter attenuates switching noise that present reduces possibility output pulse width jitter. MOTOROLA ANALOG DEVICE DATA Amplifier gain dynamic impedance feedback input nominally centered dynamic impedance this combined with external resistive capacitive components determines control loop characteristics converter. feedback input temperature compensated threshold used voltage reference non-isolated output applications. input dynamic resistance shown Figure External Shutdown Latch latching shutdown feature been incorporated into this device series eliminate possibility converter runaway output voltage during sudden load removal. External Shutdown block sets Shutdown Latch when feedback input current exceeds When set, Latch holds MOSFET Power Switch circuit off, Start-Up circuit hystereticly regulates voltage between order resume switching operation, Shutdown Latch must reset Power-Up Reset block. This accomplished directly momentarily pulling below Power-Up Reset threshold, indirectly removing, waiting, then restoring power converter input. Power-Up Reset block automatically resets Shutdown Latch each time power applied device. Current Limit Comparator Power Switch Circuit This device series uses cycle-by-cycle current limiting means protecting output switch circuit from overstress. Each on-cycle treated separate situation. Current limiting implemented monitoring output switch circuit current buildup during conduction, upon sensing overcurrent condition, immediately turning switch circuit duration oscillator ramp-down period. Power Switch circuit constructed SENSEFET circuit with high voltage JFET series with voltage MOSFET. drain high voltage JFET connected gate JFET grounded. source JFET connected drain voltage MOSFET. MOSFET sources different size with known ratio about 1:100. source MOSFET connected provides main current conduction path between second source MOSFET used current sensing conducting small percentage current between through ground referenced sense resistor, RPK. voltage across sense resistor represents current from divided known ratio MOSFET sources. SENSEFET circuit allows virtually lossless method monitoring current from current limit comparator detects voltage across exceeds reference level that present noninverting input. exceeded, comparator quickly resets Latch, thus protecting Power Switch circuit. Figure shows that this detection method yields relatively constant current limit threshold over temperature. high voltage Power Switch circuit integrated with control logic circuitry designed directly drive converter transformer. Power Switch circuit capable switching with associated current from that ranges from Proper voltage snubbing during converter startup overload mandatory reliable device operation. Leading Edge Blanking circuit placed current sensing signal path prevent premature reset Latch. potential premature reset signal generated each time
MC33369 thru MC33374
Power Switch circuit driven into conduction appears narrow voltage spike across current sense resistor Rpk. spike voltage MOSFET gate source capacitance, transformer interwinding capacitance, output rectifier recovery time. Leading Edge Blanking circuit dynamic behavior that masks current signal until Power Switch circuit turn-on transition completed. current limit propagation delay time typically This time measured from when overcurrent appears Power Switch circuit, beginning turn-off. Care must taken during transformer saturation that maximum device current limit rating exceeded.
Figure Startup Normal Operation Timing Diagram
Shunt Regulation Threshold Feedback Input Voltage (Pin
Flyback Voltage Power Switch Voltage (Pin Switching Disabled Startup Switching Normal Operation Rectified Line Voltage
Figure Auto Restart Operation Timing Diagram
Hysteretic Regulation Start-Up Circuit Feedback Input Voltage (Pin Istart ICC1 Istart ICC2 Istart ICC2 Istart ICC1 Start-Up Circuit Duty Cycle During Auto Restart, External Shutdown, Thermal Shutdown, State Control Mode Flyback Voltage Rectified Line Voltage
Eight Cycles Power Switch Voltage (Pin Switching Disabled Startup Switching Switching Disabled
Power Switch Circuit Duty Cycle During Auto Restart
Switching Switching Disabled Switching Auto Restart Operation with Overloaded Shorted Output
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Start-Up Circuit Contained within MC33369 thru MC33374 Start-Up circuit that governed State Control block. Start-Up circuit includes high voltage JFET voltage MOSFET. drain high voltage JFET connected gate JFET grounded. source high voltage JFET connected drain voltage MOSFET. JFET pinches clamps voltage drain MOSFET voltage between 18-24 volts. resistance 550K ohms connected between drain gate voltage MOSFET. voltage drain gate MOSFET simplifies construction Start-Up circuit. This circuitry yields increase converter efficiency elimination external startup resistor associated power dissipation that common most off-line converters that utilize UC3842 type controller. Rectified line voltage applied Start-Up circuit from This enables Start-Up circuit provide charge current bypass capacitor that connects from ground. When reaches UVLO upper threshold Start-Up circuit turned complete startup phase. then commences normal operation. converter output approaches regulation, auxiliary transformer winding begins provide operating bias. required device power efficiently converted down directly from rectified line. Start-Up circuit will provide initial charging current when powered from This current will decrease voltage rises device powered from lower input voltage, refer Figures Start-Up circuit rated maximum with shorted ground. Undervoltage Lockout Undervoltage Lockout comparator included guarantee that integrated circuit sufficient voltage fully functional before output stage enabled. UVLO comparator monitors feedback input voltage when exceeds startup threshold Start-Up circuit turns off, Internal Bias block switched Power Switch circuit enabled. prevent erratic switching threshold crossed, hysteresis provided. This level hysteresis ensures that there sufficient energy stored bypass capacitor power bias circuitry until auxiliary power supply takes over. converter output nominally loaded, regulation will established opto-isolator will provide sufficient current into feedback input keep bypass capacitor charged. Figure shows timing waveforms during startup normal operation. converter output overloaded shorted, device will enter into auto restart mode. This happens when opto-isolator able provide sufficient current into feedback input keep bypass capacitor charged. When capacitor voltage falls below minimum operating threshold UVLO comparator switches Internal Bias block off, disables Power Switch circuit. Start-Up circuit turned bypass capacitor begins charging. When UVLO startup threshold reached, Start-Up circuit again turns off, Internal Bias block switched Divide counter clocked. Since Power Switch circuit disabled Divide counter, opto-isolator will provide current bypass capacitor, capacitor will discharge. UVLO comparator Start-Up circuit will regulate capacitor voltage hysteretic mode, varying between with effective ramp-up duty cycle approximately 35%. Divide counter will enable Power Switch circuit burst Oscillator frequency every eighth ramp-down cycle. device will remain auto restart mode until output overload short removed threshold regulation again reached. purpose Divide counter reduce Power Switch circuit output rectifier power dissipation when converter subjected output overload short. counter effectively limits average switching duty cycle approximately Figure shows timing waveforms when auto restart mode. Thermal Shutdown Package internal Thermal Shutdown block protects device event that maximum junction temperature exceeded. When activated, typically 157°C, input Driver held disable Power Switch circuit. When disabled, UVLO comparator Start-Up circuit regulate voltage hysteretic mode. Thermal shutdown activation non-latching Power Switch circuit allowed resume operation when junction temperature falls below 140°C. thermal shutdown feature provided prevent catastrophic device failures from accidental overheating. intended used substitute proper heatsinking. 8-pin dual-in-line package mounted special heat copper alloy lead frame. consists pins specifically designed improve thermal conduction from printed circuit board. This permits standard layout mounting practices while having ability halve junction thermal resistance. TO-220 style package mounted directly copper alloy heat tab. This metal exposed back side package heatsink attachment electrically common device ground, wide variety TO-220 style heatsinks commercially available enhancing thermal performance converter output power capability. State Control State Control block designed interface with small number external components implement various methods converter on/off control. utilizing distinctive features State Control Input, this device series programmed enter into either standby* operating mode response appropriate input stimulus. This stimulus come from user interface pushbutton switch, optically coupled microcontroller output signal, combination both, other circuit configurations. State Control Logic disabled made appear transparent when converter on/off control required. Figures respectively show State Control operating table, Control Block along with seven input examples. State Control block consists resistor bias network, Toggle Comparators threshold detection, Input Clamp provide drive opto light emitting diode, control logic elements storing operating state, Reset MOSFET discharging
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
external capacitor. State Control Input internally biased 3.55 when input regulated This internal bias overridden driven either high external signal order trip comparators. Toggle Comparator thresholds respectively comparator outputs processed stored State Control Logic block which turn controls Start-Up circuit, Internal Bias block, Divide reset. Circuit shows input configuration manual toggle operation. toggle request made each time pushbutton switch pressed released. When Toggle Comparator detects request, output clocks State Control Logic, resulting converter mode change. Successive toggle requests causes converter alternate between standby* operating modes. When standby* mode, UVLO comparator Start-Up circuit regulate voltage hysteretic mode, there voltage present converter output. Circuit configures input interface with microcontroller graceful shutdown operation. Graceful shutdown advanced form power management where microcontroller overriding responsibility determining when converter enters into standby* mode. This usually programmed occur after microcontroller completes housekeeping routines. toggle request made each time pushbutton switch pressed released. When Comparator detects request, output sets State Control Logic, causing converter enter operating mode. converter initially operating, mode change takes place. Note that each toggle request conveyed microcontroller Opto current path biasing light emitting diode provided series resistor internal Input Clamp. microcontroller receives processes toggle request upon completion maintenance routine, sends toggle confirm signal back State Control input Opto This signal detected Toggle Comparator converter enters into standby* mode. With this circuit configuration, user only control standby* operating mode transition. user request operating standby* mode transition, microcontroller total control executing request. Circuit configures input brownout protection. cathode zener diode connects rectified filtered line voltage that appears positive terminal bulk capacitor With appropriate zener diode resistor values, State Control Input voltage fall below during brownout condition. This results toggle request that causes converter incisively change from operating standby* mode without converter output voltage bounce. When line voltage returns back nominal, voltage State Control Input rises, causing Comparator change converter mode from standby* operating. Note that when converter standby*, Comparator threshold will lower than specified, approximately 3.84 This because regulated hysteretic mode between Circuit shows method accomplishing digital on/off control converter. Pull-up resistor serves bias Comparator turn-on, while transistor biases Toggle Comparator turn-off. economical optocoupler used galvanic isolation signal source required. Capacitor shown each examples provides important programming function. small value capacitor (0.05 serves filter noise that coupled into state control pin, thereby preventing false triggering comparators. relatively large value capacitor (2.0 will delay initial rise state control voltage during startup. This action results converter powering standby* rather than operating mode. Circuit configures State Control Input provide power-up time delay converter. Upon initial application power, large value capacitor causes Toggle Comparator place converter standby*. When pull-up resistor charges Comparator threshold, converter changes operating mode. graph power-up time delay versus resistance three values shown. circuits shown example Circuit page exemplifies possible methods disabling State Control block on/off capability, thus rendering transparent. This feature useful applications where converter on/off control desired. When nominal line voltage applied converter input, resistor circuit will cause Comparator place converter operating mode. resistor value critical, should least insure proper device start-up. converter will also assume operating mode State Control Input left open unconnected. relatively high input impedance, this input susceptible noise pickup. small bypass capacitor range recommended Cst. converter will assume operation mode with either these circuits. Applications TO220 devices have single Ground, that serves both sense point Shunt Regulator/Amplifier high current return path power switch circuit. attempt construct converter circuit wire-wrap plug-in prototype board. order ensure proper device operation stability, important minimize lead length associated inductance ground pin. This must connect directly possible printed circuit ground plane should bent offset board layout. Power Switch offset using suffix product additional layout creepage distance required. potentially high rate change switch circuit current, components must connected through separate short copper traces. This will significantly reduce level switching noise that imposed upon feedback control signal. Figures through show universal input watt watt converter with associated test data. converters were constructed tested using printed circuit board layout shown Figure board consists fiber glass epoxy material (FR4) with single side ounce square foot copper foil. designed general purpose single output laboratory test vehicle therefore does contain input electromagnetic interference (EMI) filter. board layout capable encompassing wide range output power available from TO220TV package devices providing means accept several component
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
sizes styles. Note that there multiple positions output filter capacitors C11, allowing four capacitors parallel. various positions transformer will accomodate four core/bobbin sizes, consisting E19/8/5 (E187), E22, E25/10/6 (E250), E28. Unused pins must removed from bobbin. choice four TO220 style heatsinks used integrated circuit output rectfier They available from several manufacturers including Aavid Engineering. table shown below lists Aavid part numbers along with associated thermal characteristics. extruded heatsink must drilled tapped allow attachment device printed circuit board.
Heatsink
junction temperature current limit threshold device selected. table below provides general guide device selection assuming following conditions: Discontinuous mode flyback operation Wide range input operation from Bulk capacitor ripple voltage input Converter efficiency Ambient temperature 25°C Adequate heatsinking junction temperature 150°C
Device MC33369P MC33370P MC33371P MC33372P Converter Output Power
592502B03400 593002B03400 593202B03500 590302B03600 604953B02500 Stamped Stamped Stamped Stamped 10.4 Extruded
Aavid Part Number
Style
Thermal Resistance (°C/W)
maximum output power that obtained from given converter design limited maximum operating
MOTOROLA ANALOG DEVICE DATA
MC33373AP MC33369T/TV MC33370T/TV MC33371T/TV MC33372T/TV MC33373T/TV MC33374T/TV
MC33369 thru MC33374
Figure State Control Operating Table (Circuits through Figure
Initial State Subsequent State Line Voltage Converter Mode Input (Pin Capacitor Stimuli Converter Mode Description TOGGLE OPERATION (Circuit Nominal Nominal Standby Don't Care Don't Care Pulsed Pulsed Operating Standby converter changes from standby operating mode Toggle Comparator. Operating converter changes from operating standby* mode Toggle Comparator. MICROCONTROLLER GRACEFUL SHUTDOWN (Circuit Nominal Nominal Standby Don't Care Don't Care Pulsed High Pulsed High Pulsed Operating Operating Converter mode toggle requested. Comparator changes converter mode from standby operating. Operating Converter mode toggle requested. mode change takes place since converter initially operating. change request communicated Opto Converter mode toggle confirmed Opto converter mode changes from operating standby. Nominal Operating Don't Care Standby BROWNOUT PROTECTION (Circuit Nominal Brownout Operating Don't Care Biased Standby line voltage level changes from nominal brownout zener diode breakdown ceases. lower divider resistor biases Toggle Comparator input low, changing converter mode from operating standby. line voltage level changes from brownout nominal zener diode commences breakdown. This biases Comparator input high, changing converter mode from standby operating. Brownout Nominal Standby 0.05 Biased High 3.85 Operating DIGITAL ON/OFF CONTROL (Circuit Nominal Nominal Standby Don't Care Don't Care Biased High Biased Operating Standby transistor collector resistor biases Comparator input high, placing converter operating mode. transistor collector biases Toggle Comparator input low, placing converter standby mode. Operating DELAYED POWER-UP (Circuit Zero Nominal Pulsed High Delay Operating Discharged capacitor causes Toggle Comparator change control logic state. converter placed standby mode with power switch circuit disabled. When charges above Comparator changes converter mode from standby operating. POWER-UP (Circuits Zero Nominal Zero Nominal 0.05 None Operating Application line power causes converter operation. State Control Input presently configured transparent control logic effect during power-up. Discharged capacitor causes Toggle Comparator change control logic state. converter placed standby mode with power switch circuit disabled. Pulsed Standby NOTE: When converter standby mode, there voltage present output.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure State Control Block with Input Control Examples
Manual Toggle Operation (Circuit
Resistor required proper toggle functionality when operating device elevated temperature with long leads pushbutton switch.
Toggle Request Primary Common Vaux
Graceful Shutdown (Circuit
Toggle Request Toggle Confirm Printer Port Microcontroller Control Outputs Isolation Boundary Secondary Common off)
Internal State Control Block Functional Diagram
MC33369 thru MC33374 3.55 Comparator Input Clamp Reset Toggle Comparator State Control Logic State Control Input Power Switch Start-Up Circuit
Primary Common Vbulk
Brownout Protection (Circuit
Choose VAC(on off) VAC(off thresholds. Determine converter output power efficiency input bulk capacitance Cblk. blk(max)
Internal Bias Divide Reset
VAC(off 1.88 0.88 Vblk(max) blk(min) blk(max) blk(min) 3.84 Primary Common VAC(on off) blk(min)
Vaux
Digital On/Off Control (Circuit
Converter Converter Digital on/off control converter accomplished with small signal transistor. optocoupler used galvanic isolation required.
From Voltage Detector Outputs
Primary Common
dly, TIME DELAY
Power-Up Time Delay (Circuit
programmed power-up time delay implemented with addition simple circuit.
Power-Up Time Delay versus Resistance
Primary Common
RESISTANCE (kW)
State Control Disabled (Circuit
State Control block on/off capability disabled made appear transparent either connecting pull-up resistor from input small value capacitor from input primary common. This input should left unconnected since relatively high impedance susceptible noise pick-up.
Primary Common
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Universal Input Off-Line Converter
MBR20100CT 1N5406 Input 1.5KE200A MUR160 MOC8103 8103 TL431B V/3.5 Output
33374
0.01
On/Off Toggle
Figure Converter Test Data
Test Line Regulation Conditions Vac, Vac, 0.35 Vac, 0.35 Vac, Results
Load Regulation Output Ripple Efficiency Vac, Vac, Total mVp-p 84.4% 86.2% Input Power Vac, Converter Toggle 0.06 0.19 Vac, Converter Toggle This data taken with components listed below mounted printed circuit board shown Figure Sanyo Os-Con #16SA470M, µF/16V. IC1, Sanyo Os-Con #10SA150M, µF/16V. MC33374, MBR20100 mounted Aavid #590302B03600 heatsink. Coilcraft S5088-A, 0.011 Coilcraft W7422-A Primary: turns AWG, start, finish. layers 0.002" Mylar tape. Secondary: turns AWG, strands bifilar wound, Pins start, Pins finish. Auxiliary: turns wound center bobbin, start, finish. layers 0.002" Mylar tape. Gap: 0.017" total primary inductance (LP) with primary secondary leakage inductance Core: Ferrite International E24/25 (E25/10/6) TSF-7070 material. Bobbin: Philips E24-25PCB1-10, Pins removed.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Universal Input Off-Line Converter
MBR20100CT 1N5406 Input 1.5KE200A MUR160 MOC8103 33374 1000 1000 8103 TL431B V/6.0 Output
0.01
On/Off Toggle
Figure Converter Test Data
Test Line Regulation Conditions Vac, Vac, Vac, Vac, Results
Load Regulation Output Ripple Efficiency Vac, Vac, Total mVp-p 83.2% 85.4% Input Power Vac, Converter Toggle 0.07 0.17 Vac, Converter Toggle This data taken with components listed below mounted printed circuit board shown Figure Sanyo Os-Con #16SA1000M, 1000 µF/16V. Sanyo Os-Con #10SA150M, µF/16V. MC33374 mounted Aavid #604953B02500 extruded heatsink. heatsink must drilled tapped allow device attachment. 1.5KE200A with cathode lead soldered center 5/8" 3/4" 0.025" thick U-shaped copper heatsink. MBR20100 mounted Aavid #590302B03600 heatsink. Coilcraft PCV-0-332-10, 0.005 Coilcraft W7518-A Primary: turns AWG, start, finish. layers 0.002" Mylar tape. Secondary: turns AWG, strands bifilar wound, Pins start, Pins finish. layers 0.002" Mylar tape. Auxiliary: turns wound center bobbin, start, finish. layers 0.002" Mylar tape. Gap: 0.022" total primary inductance (LP) with primary secondary leakage inductance Core: PC40 EI28Z, PC40 material. Bobbin: BE-28-1110CPL, Pins removed.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Printed Circuit Board Component Layout (Circuit Figures E19/8/5
Toggle On/Off
Line Input
2.50
MC33369 thru
Caution! High Voltages
(Top View)
4.00
(Bottom View)
MOTOROLA ANALOG DEVICE DATA
Output
E25/10/6
MC33369 thru MC33374
Figure Snubber Damper Circuits
Snubber Damper VOLTAGE MUR160 Turn-Off Voltage TURN-OFF Time (ms) Substrate forward biased Insufficient Snubbing
Turn-Off Voltage VOLTAGE TURN-OFF Time (ms) Sufficient Snubbing
Converter Figure
Output Power
Primary Leakage Inductance
Component Values Snubber Damper
Figures zener diode limit voltage damper circuit consisting resistor capacitor zener replaced with snubber circuit shown above consisting resistor capacitor component values selected must insure that turn-off voltage never exceeds under line voltage load current conditions when using transformer with highest anticipated leakage inductance. There must
also sufficient snubbing damping prevent turn-off voltage from ringing below ground. This will cause forward biasing substrate result additional device power dissipation converter instability. Suggested snubber damper component values Figures listed table above. snubber damper circuits will greatly reduce radiated switching noise there will slight penalty converter efficiency.
Figure Recommended Printed Circuit Board Layout
Feedback bias source. High switch current from transformer Power Switch Pin.
High switch current return from Ground negative terminal capacitor
Feedback bias return auxiliary winding ground terminal transformer
order ensure proper device operation, integrated circuit Ground, must connect directly possible printed circuit board ground foil. ground should bent offset board layout. Power Switch circuit, offset additional creepage distance
required using suffix product. Components connect through seperate short copper traces IC1. This will reduce level undesirable switching noise that appears Feedback Input pins.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Transformer Auxiliary Winding Elimination Zener Shunt Regulator Method
IN965B
Figure Transformer Auxiliary Winding Elimination Bipolar Transistor Series Regulator Method
IN965B
13003
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure Transformer Auxiliary Winding Elimination MOSFET Transistor Series Regulator Method
IN968B 1N50E
Figures through show three possible methods eliminating transformer auxiliary winding associated fast recovery diode capacitor. These methods most practical fixed narrow range line voltage applications. Care must taken when used wide range line voltage applications, power dissipation voltage dropping elements become excessive.
shunt regulator method most economical series pass methods dissipate less power when used wide range line voltage applications. MOSFET method most efficient since gate requires essentially zero current. component values shown above figures nominal line voltage volts ±20%.
Figure Converter Soft-Start
bias source Feedback High switch current from transformer Power Switch Pin.
2N3906 1N757A 2N3904 1N752A
IN4148 Converter On/Off Control
0.01
High switch current circuit return from Ground negative terminal capacitor
Converter soft-start implemented separating connection between Pins with resistor. Initially with converter state, internal Start-Up circuit charges capacitor voltage that exceeds plus breakdown This causes transistors latch Since voltage greater than internal shunt regulator threshold, minimum duty cycle pulses appear Power Switch circuit
voltage across approaches regulation threshold, duty cycle will gradually increase until regulation established converter output. Upon converter power down, transistor latch will turn approximately which slightly greater than devices highest minimum operating voltage specification. This guarantees that soft-start will active upon next power-up cycle.
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
Figure High Voltage Step-Up Converter
Input 33374 Input Boost Rectifier
0.01
On/Off Toggle
simple transformerless high voltage step-up converter constructed with devices this series. maximum output voltage this topology limited Power Switch circuit breakdown minus forward voltage drop boost rectifier. converter requires minimum input guarantee start-up. regulated
output voltage equal zener voltage drops, plus shunt regulator threshold, plus voltage drop across resistor. boost rectifier must schottky fast recovery type with sufficient current voltage capability meet converter output requirements.
Figure Power Off-Line Converter
680* Input 680* 1N4006 *TRW flameproof fusable resistor 33370 1N4006 1N4933 V/20 Output
4733A
0.01 P4KE600
converter shown above designed cost sensitive power applications that require line isolated power source. Typical applications include consumer industrial equipment. Note that transformer auxiliary
winding been eliminated MC33370 operates continuously auto restart mode. This method converter operation capable providing output power
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
OUTLINE DIMENSIONS
SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE
NOTE
NOTES: DIMENSION CENTER LEAD WHEN FORMED PARALLEL. PACKAGE CONTOUR OPTIONAL (ROUND SQUARE CORNERS). DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. MILLIMETERS 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 0.76 1.27 0.20 0.30 2.92 3.43 7.62 0.76 1.01 INCHES 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 0.030 0.050 0.008 0.012 0.115 0.135 0.300 0.030 0.040
SEATING PLANE
0.13 (0.005)
SUFFIX PLASTIC PACKAGE CASE 314D-04 ISSUE
SEATING PLANE
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION DOES INCLUDE INTERCONNECT (DAMBAR) PROTRUSION. DIMENSION INCLUDING PROTRUSION SHALL EXCEED 10.92 (0.043) MAXIMUM. INCHES 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.067 0.087 0.112 0.015 0.025 0.990 1.045 0.320 0.365 0.140 0.153 0.105 0.117 MILLIMETERS 14.529 15.570 9.906 10.541 4.318 4.572 0.635 0.965 1.219 1.397 1.702 2.210 2.845 0.381 0.635 25.146 26.543 8.128 9.271 3.556 3.886 2.667 2.972
1234
0.356 (0.014)
SUFFIX PLASTIC PACKAGE CASE 314E-01 ISSUE
OPTIONAL CHAMFER
NOTES: DIMENSIONS INCHES. INTERPRET DIMENSIONS TOLERANCES ASME Y14.5M, 1994. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.005 TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. INCHES 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.890 0.930 0.067 0.105 0.015 0.025 0.900 1.000 0.320 0.365 0.259 0.140 0.153 0.620 0.468 0.505 0.718 0.090 0.100
12345
0.024
SEATING PLANE
0.010
MOTOROLA ANALOG DEVICE DATA
MC33369 thru MC33374
SENSEFET trademark Motorola, Inc.
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters which provided Motorola data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer. Mfax trademark Motorola, Inc. reach EUROPE Locations Listed: Motorola Literature Distribution; P.O. 5405, Denver, Colorado 80217. 1-303-675-2140 1-800-441-2447 Customer Focus Center: 1-800-521-6274 MfaxTM: RMFAX0@email.sps.mot.com TOUCHTONE 1-602-244-6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Ping Industrial Park, Motorola Back System Canada ONLY 1-800-774-1848 Ting Road, N.T., Hong Kong. 852-26629298 http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ JAPAN: Nippon Motorola Ltd.; SPD, Strategic Planning Office, 141, 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan. 81-3-5487-8488
MC33370/D MOTOROLA ANALOG DEVICE DATA
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