BIPOLAR SWITCHING REGULATOR CONTROLLER MB3769A DESCRIPT

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BIPOLAR SWITCHING REGULATOR CONTROLLER MB3769A DESCRIPT

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DS04-27202-6Ea
BIPOLAR
SWITCHING REGULATOR CONTROLLER
MB3769A
DESCRIPTION
Fujitsu Microelectronics MB3769A pulse-width-modulation controller which applied fixed frequency pulse modulation technique. MB3769A contains wide band width Op-Amp high speed comparator construct very high speed switching regulator system kHz. Output suitable power drive owing adoption totem pole output. MB3769A provides stand-by mode voltage power supply when applied primary control system.
FEATURES
High frequency oscillator kHz) On-chip wide band frequency operation amplifier Typ) On-chip high speed comparator Typ) Internal reference voltage generator provides stable reference supply power dissipation (1.5 standby mode, operating mode) Output current peak)
High speed switching operation 1000 Typ)
Adjustable Dead-time On-chip soft start quick shut down functions Internal circuitry prohibits double pulse dynamic current limit operation Under voltage lock function (OFF Typ, OFF: Typ) On-chip output shut down circuit with latch function over voltage On-chip Zener diode type package (SOP-16pin type)
APPLICATIONS
Power supply module Industrial Equipment AC/DC Converter
etc.
Copyright©1994-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2006.5
MB3769A
ASSIGNMENT
(TOP VIEW)
(OP) (OP)
VREF
(FPT-16P-M06)
MB3769A
BLOCK DIAGRAM
Fig. MB3769A Block Diagram
Over Current Detection Comparator 1.85 VREF +PWM +Comp. (OP)
Error Over Voltage Detector Power Triangle Wave Oscillator
(OP)
8/10
(2.5
15.4 Reference Regulator
VREF
MB3769A
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Output Current Operation Input Voltage Power Dissipation Storage Temperature Duty package mounted epoxy board. 0.15 WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings. Symbol IOUT (OP) TSTG Rating (660* 620*2 +125
Unit
MB3769A
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage Output Current (DC) Output Current (Peak) Operation Input voltage Sink Current Source Current Comparator Input Voltage Reference Section Output Current Timing Resistor Timing Capacitor Oscillator Frequency Zener Current Operating Ambient Temperature: Symbol IOUT IOUT PEAK VINOP ISINK ISOURCE
package -100 -600 -0.2 -0.3 -0.3 VREF +100 +600 VCC-3
Unit
VINCIREF fOSC
WARNING: recommended operating conditions required order ensure normal operation semiconductor device. device's electrical characteristics warranted when device operated within these ranges. Always semiconductor devices within their recommended operating condition ranges. Operation outside these ranges adversely affect reliability could result device failure. warranty made with respect uses, operating conditions, combinations represented data sheet. Users considering application outside listed conditions advised contact their representatives beforehand.
MB3769A
ELECTRICAL CHARACTERISTICS
(VCC=15V, Ta=+25°C)
Parameter
Output Voltage Input Regulation Reference Load Regulation Section Temp. Stability Short Circuit Output Current Oscillator Frequency Oscillator Section Voltage Stability Temp. Stability Input Bias Current Max. Duty Cycle Duty Cycle Dead -time Duty Control Input Cycle Section Threshold Max. Duty Voltage Cycle Discharge Voltage Input Offset Voltage Input Offset Current Input Bias Current Common-Mode Input Voltage Error Amplifier Section Voltage Gain Band Width Slew Rate Common-Mode Rejection Rate Level Output Voltage Level Output Voltage
Symbol
VREF VRIN VRLD VRTEMP fOSC fOSCIN fOSC Dmax Dset (OP) (OP) (OP) (OP) (OP)
Condition
IREF IREF VREF
Value
1.55 -0.2
±200 ±0.03 1.85 -0.3
±750 ±300
Unit
V/µs
VREF IDTC -0.3
(Continued)
MB3769A
(Continued)
(VCC=15V, Ta=+25°C)
Parameter
Input Offset Voltage Input Bias Current Current Comparator Common-Mode Input Voltage Voltage Gain Response Time Comparator Section Duty Cycle Duty Cycle Level Output Voltage Level Output Voltage Output Section Rise Time Fall Time Over Voltage Detector Under Voltage Stop Threshold Voltage Input Current Reset Standby Supply Current Operating Zener Voltage Zener Current
Symbol VOPO VOPM VOVP IIOVP VTHH VTHL ISTB
Condition over drive IOUT -100 IOUT 1000 1000 Open V11-7
Value
1.55 12.5 -1.0
1.85 13.5 -0.2 10.0 15.4 0.03
10.8 12.0
Unit
MB3769A
Fig. MB3769A Test Circuit
15.0 OUTPUT
COMP (OP) (OP) VDTC VREF MB3769A 1000
TEST INPUT <tr, Voltage 1.05 COMP 0.95 COMP-in should within
OUTPUT
MB3769A
Fig. MB3769A Operating Timing
Soft Start Operation Dead-Time Input Voltage Triangle Wave Form Error Output
1.85V
Quick Shutdown Operation
Comparator Output Output Wave Form Comp. Current Wave Form Comp. Current Wave Form Comp. Current Latch Output Voltage Latch Power Supply Voltage Standby Mode Over Voltage Detector Latch (Typ) Over Current Detector
(Typ) Over Voltage Detector
Standby Mode
MB3769A
FUNCTIONS Error Amplifier
error amplifier detects output voltage switching regulator. error amplifier uses high-speed operational amplifier with bandwidth (typical) V/µs slew rate (typical). ease use, common mode input voltage ranges from -0.2 VCC-3 Figure shows equivalent circuit.
Fig. MB3769A Equivalent Circuit Differential
VREF
(OP) (OP)
Comp.
Protection element
Overcurrent Detection Comparator
There methods protection output transistor this device from overcurrents; restricts transistor's ontime overcurrent that flows through output transistor detected from average output current, other detects overcurrent external transistor (FET) shuts output down instantaneously. Using average output currents, peak current external transistor (FET) cannot detected, output transistor with large safe operation area (SOA) margin required. method detecting overcurrents external transistor (FET), output transistor protected against shorted filter capacitor power-on surge current. MB3769A uses dynamic current limiting detect overcurrents output transistor (FET). high-speed comparator flip-flop built-in. detect overcurrents, compare voltage +IN(C) current detection resistor connected source output transistor (FET), with reference voltage (connected -IN(C)) using comparator. prevent output oscillation during overcurrent, flipflop circuit protects against double pulses occurring within cycle. output overcurrent detector ORed with other signals comparator. example Application Example" details use. Figure shows equivalent circuit over-current detection comparator.
MB3769A
Fig. MB3769A Equivalent Circuit Over Current Detection Comparator
VREF
Comp.
Protection element
DTC: Dead Time Control (Soft-Start Quick Shutdown)
dead time control terminal error amplifier output connected comparator. maximum duty cycle VDTC (voltage applied obtained from following formula (approximate value frequency): Duty Cycle (3.5 VDTC) duty cycle DMAX (80%)] dead time control terminal used provide soft start. Figure terminal connected VREF terminal through Because capacitor does charge instantaneously when power turned output transistor kept turned off. input voltage output pulse width increase gradually according time constant that control system operates safely.
Fig. MB3769A Soft Start Function
VREF Soft Start Soft Start VREF
quick shutdown function prevents soft start malfunction when power turned quickly. After power shut down, soft start disabled because terminal electric potential from beginning power turned again before capacitor discharged. MB3769A prevents this turning discharge transistor quickly discharge capacitor stand-by mode.
MB3769A
Triangular Wave Oscillator
oscillation frequency expressed following formula: 0.0002 [kHz]
fOSC
master/slave synchronized operation several MB3769As, terminals master MB3769A connected usual terminals master slave device connected together. slave MB3769A's terminal connected it's VREF terminal disable slave's oscillator. this case, 50/n number master slave ICs) upper limit that internal bias currents stop master oscillation.
Fig. MB3769A Synchronized Operation
master VREF
slave
Overvoltage Detector
overvoltage detection circuit shuts system power down switching regulator's output voltage abnormal abnormal voltage appeared. reference voltage (VREF /2). system power shut down voltage rises above output kept shut down latching circuit until power supply turned (see Figure
Stand-by Mode Under-Voltage Lockout (UVLO)
Generally, required power MOSFET switching. UVLO that output (standard) when power turned (standard) when power turned off. stand-by mode, power supply current limited less when output inhibited UVLO circuit. When MB3769A operated from line, power supply current supplied through resistor (Figure That power supply current supplied line through resistor until operation starts. Current then supplied from transformer tertiary winding, eliminating need second power supply. volts (typical) hysteresis provided return from operation mode stand-by mode return stand-by mode until output power turned avoid malfunction noise.
MB3769A
Fig. MB3769A Primary Control
MB3769A
Output Section
Because terminal (pin carries large current, collector emitter output transistor brought terminals. principle, connected connected GND, supplied from another power supply Note that should connected close package possible. capacitor more inserted between (see Figure Fig. MB3769A Typical Connection Circuit Output
MB3769A
APPLICATION EXAMPLE
Fig. MB3769A Convertor
1+IN (OP) 2-IN (OP) 4DTC 7GND VREF MB3769A
Overcurrent Protection Circuit
waveform output source terminal shown Figure time constant must chosen that voltage glitch waveform does cause erroneous overcurrent detection. This time constant should from detection current value depends because waveform weakened. keep this glitch small possible, rectifiers transformer secondary winding must fast-recovery type.
Fig. MB3769A Output Source Point
Glitch Point waveform
MB3769A
Fig. -Primary Control
+IN(OP) +IN(C) -IN(OP) -IN(C) VREF
resistance output current limiter required when driving which more than 1000 (CGS).
Secondly power supply
Fig. -Secondly Control
1000
+IN(OP) +IN(C) -IN(OP) -IN(C) VREF
MB3769A
SHORT PROTECTION CIRCUIT
system power shut down protect output against intermittent short-circuits continuous overloads. This protection circuit configured using input shown Figure
Fig. -Case (Over Protection Input) Primary Mode
output)
IN-B IN-A
MB3761
OUT-B HYS-A
MB3769A
Fig. -Case (Over Protection Input) Secondly Mode
output) VREF MB3769A
IN-B IN-A OUT-B MB3761
HYS-A
MB3769A
SYNCHRONIZE WITH OUTSIDE CLOCK
MB3769A oscillator circuit shown Figure charge discharge currents expressed following formula:
Fig. -Oscillator Circuit
VREF
This circuit shows that voltage terminal less, oscillation cycle ends next cycle starts. example external synchronous clock circuit shown Figure
Fig. -Typical Connection Synchronized Outside Clock Circuit
tcycle MB3769A MB74HC04 R(5.1 clamp circuit (VL) tcycle (fEXT kHz)
Figure shows terminal waveform. near this case, maximum duty cycle restricted shown formula below
Fig. -Voltage Waveform
1.85 Dmax= (3.5 1.85) (3.5 VTH) (3.5 (3.5 VTH) clamp circuit) When provided followings. tcycle fOSC (3.5 (3.5 VTH) fOSC(3.5 1.5)
MB3769A
(tcycle [pF] (RT: tcycle,
fOSC
Make high large duty cycle clamp circuit. circuits below used because clamp voltage must much lower than
Fig. -Clamp Circuit
VREF (4.7 (1.2 (1.2 (1.2 VREF MB3761
circuit must determined considering effects transistor saturation voltage must very small (<0.15 clamp circuit, transistor with very small (sat) should used.
MB3769A
SYNCHRONIZED OUTSIDE CLOCK CIRCUIT
Fig.
1.No Clamp Circuit (Connect with GND) V/div) Prove Capacitor V/div) Level (CT) V/div) MB74HC04
Fig.
2.Clamp Circuit (Dividing Resistor) V/div) Prove capacitor Level (CT) V/div) MB74HC04 VREF
V/div)
Fig.
3.Clamp Circuit (Apply MB3761) V/div) Prove capacitor Level (CT) V/div) MB74HC04 VREF MB3761
V/div)
MB3769A
Fig. -Test Circuit
(VCC) MB3769A
MB3769A
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. -Power Supply Voltage Power Supply Current (Low Voltage stop VCC)
Power Supply Current (mA) 10.0 12.0 16.0 20.0 operating Standby Current ISTB (mA) operating Normal operating
Fig. -Standby Current Operating Ambient Temperature
Power Supply Voltage
Operating Ambient Temperature (°C)
Fig. -Reference Voltage
Reference Voltage VREF IREF
Fig. -"L" level Output Voltage level Output Current
level Output Voltage
±750 µV/C
Operating Ambient Temperature (°C)
level Output Current (mA)
Fig. -"H" level Output Voltage level Output Current
level Output Voltage level Output Current (mA)
(Continued)
MB3769A
Oscillator Frequency fOSC (kHz)
"H", level Output Voltage
Fig. -Oscillator Frequency
Fig. -"H", level Output Voltage Oscillator Frequency
1000 2200 (k), (pF)
Frequency fOSC (Hz)
Fig. -Oscillator Frequency Operating Ambient Temperature
Oscillator Frequency fOSC
Fig. -Duty Cycle Dead Time Control Voltage
fOSC fOSC Duty Cycle 1000 Dead Time Control Voltage VDTC
Target fOSC
Operating Ambient Temperature (°C)
Fig. -Dead Time Control Voltage Current(Standby Mode)
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2 Dead Time Control Current IDTC (mA)
Dead Time Control Voltage VDTC
(Continued)
MB3769A
Fig. -Gain/Phase Frequency (Set
Gain (dB) Gain -360 -180 -240 -300 Phase (deg)
Fig. -Duty Operating Ambient Temperature
1000 VDTC
Phase
Duty
fOSC
fOSC
Frequency (Hz)
Operating Ambient Temperature (°C)
Fig. -"L" level Output Voltage level Output Current
level Output Voltage
Fig. -tr/tf Output Comparator Operating Ambient Temperature
1000
tr/tf/td (ns) level Output Current (mA)
Fig. -"H" level Output Voltage level Output Current
level Output Voltage 14.0
13.5
13.0
12.5 level Output Current (mA)
Operating Ambient Temperature (°C)
(Continued)
MB3769A
(Continued)
Fig. -OVP Latch Standby Power Supply Current Operating Ambient Temperature
Standby Power Supply Current (mA) open
Fig. -OVP Supply Voltage Reset Operating Ambient Temperature
Supply Voltage Reset
Operating Ambient Temperature (°C)
Operating Ambient Temperature (°C)
MB3769A
NOTES
Take account common impedance when designing earth line printed wiring board. Take measures against static electricity. semiconductors, antistatic conductive containers. When storing carrying printed circuit board after chip mounting, conductive container. work table, tools measuring instruments must grounded. worker must grounding device containing resistors series. apply negative voltage Applying negative voltage -0.3 less generate parasitic transistor, resulting malfunction.
ORDERING INFORMATION
Part number MB3769APF- MB3769APF-E1 Package 16-pin plastic (FPT-16P-M06) 16-pin plastic (FPT-16P-M06) Remarks Conventional version Lead Free version
RoHS Compliance Information Lead (Pb) Free version
products Fujitsu Microelectronics with "E1" compliant with RoHS Directive observed standard lead, cadmium, mercury, Hexavalent chromium, polybrominated biphenyls (PBB) polybrominated diphenyl ethers (PBDE) product that conforms this standard added "E1" part number.
MARKING FORMAT (Lead Free version)
MB3769A
XXXX
INDEX Lead Free version SOP-16
MB3769A
LABELING SAMPLE (Lead free version)
Lead free mark JEITA logo JEDEC logo
MB123456P
(3N) 1MB123456P-789-GE1 1000
(3N)2 1561190005 107210
PASS
1,000 MB123456P
2006/03/01
ASSEMBLED JAPAN
MB123456P
0605 Z01A 1000
1561190005
Lead Free version
MB3769A
MB3769APF-E1 RECOMMENDED CONDITIONS MOISTURE SENSITIVITY LEVEL
Item Mounting Method Mounting times Before opening Storage period From opening reflow When storage period after opening exceeded Storage conditions Condition (infrared reflow) Manual soldering (partial heating method) times Please within years after Manufacture. Less than days Please processes within days after baking (125 24H)
70%RH less (the lowest possible humidity)
[Temperature Profile Standard Reflow] (infrared reflow) rank
(d')
Temperature Increase gradient Preliminary heating Temperature Increase gradient Actual heating (d')
Cooling
Average °C/s °C/s Temperature 180s Average °C/s °C/s Temperature Max; more, less Temperature more, less Temperature more, less Temperature more, less Natural cooling forced cooling
Note Temperature package body Manual soldering (partial heating method) Conditions Temperature Times max/pin
MB3769A
PACKAGE DIMENSION
16-pin plastic Lead pitch Package width package length Lead shape Sealing method Mounting height Weight 1.27 10.15 Gullwing Plastic mold 2.25 0.20
(FPT-16P-M06)
Code (Reference)
16-pin plastic (FPT-16P-M06)
*110.15 -0.20 .400 -.008
+0.25 +.010
Note These dimensions include resin protrusion. Note These dimensions include resin protrusion. Note Pins width pins thickness include plating thickness. Note Pins width include cutting remainder.
0.17 -0.04
+0.03 +.001
.007 -.002
INDEX
5.30±0.30
7.80±0.40 (.209±.012) (.307±.016) Details part 2.00 -0.15 .079 -.006
+0.25 +.010
(Mounting height)
0.13(.005)
0.25(.010) 0~8°
1.27(.050)
0.47±0.08 (.019±.003)
0.50±0.20 (.020±.008) 0.60±0.15 (.024±.006)
0.10 -0.05
+0.10 +.004
.004 -.002 (Stand off)
0.10(.004)
2002 FUJITSU LIMITED F16015S-c-4-7
Dimensions (inches). Note: values parentheses reference values.
MB3769A
MEMO
MB3769A
MEMO
MB3769A
MEMO
FUJITSU MICROELECTRONICS LIMITED
Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ further information please contact: North South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 Arques Avenue, Sunnyvale, 94085-5401, U.S.A. Tel: +1-408-737-5600 Fax: +1-408-737-5999 http://www.fma.fujitsu.com/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Pittlerstrasse 63225 Langen, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 Korea FUJITSU MICROELECTRONICS KOREA LTD. KOSMO TOWER, 1002 Daechi-Dong, Kangnam-Gu,Seoul 135-280 Korea Tel: +82-2-3484-7100 Fax: +82-2-3484-7111 http://www.fmk.fujitsu.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA LTD. Lorong Chuan, #05-08 Tech Park, Singapore 556741 Tel: +65-6281-0770 Fax: +65-6281-0220 FUJITSU MICROELECTRONICS SHANGHAI CO., LTD. Rm.3102, Bund Center, No.222 Road(E), Shanghai 200002, China Tel: +86-21-6335-1560 Fax: +86-21-6335-1605 http://cn.fujitsu.com/fmc/ FUJITSU MICROELECTRONICS PACIFIC ASIA LTD. 10/F., World Commerce Centre, Canton Road Tsimshatsui, Kowloon Hong Kong Tel: +852-2377-0226 Fax: +852-2376-3269 http://cn.fujitsu.com/fmc/tw
Rights Reserved. contents this document subject change without notice. Customers advised consult with sales representatives before ordering. information, such descriptions function application circuit examples, this document presented solely purpose reference show examples operations uses FUJITSU MICROELECTRONICS device; FUJITSU MICROELECTRONICS does warrant proper operation device with respect based such information. When develop equipment incorporating device based such information, must assume responsibility arising such information. FUJITSU MICROELECTRONICS assumes liability damages whatsoever arising information. information this document, including descriptions function schematic diagrams, shall construed license exercise intellectual property right, such patent right copyright, other right FUJITSU MICROELECTRONICS third party does FUJITSU MICROELECTRONICS warrant non-infringement third-party's intellectual property right other right using such information. FUJITSU MICROELECTRONICS assumes liability infringement intellectual property rights other rights third parties which would result from information contained herein. products described this document designed, developed manufactured contemplated general use, including without limitation, ordinary industrial use, general office use, personal use, household use, designed, developed manufactured contemplated accompanying fatal risks dangers that, unless extremely high safety secured, could have serious effect public, could lead directly death, personal injury, severe physical damage other loss (i.e., nuclear reaction control nuclear facility, aircraft flight control, traffic control, mass transport control, medical life support system, missile launch control weapon system), requiring extremely high reliability (i.e., submersible repeater artificial satellite). Please note that FUJITSU MICROELECTRONICS will liable against and/or third party claims damages arising connection with above-mentioned uses products. semiconductor devices have inherent chance failure. must protect against injury, damage loss from such failures incorporating safety design measures into your facility equipment such redundancy, fire protection, prevention over-current levels other abnormal operating conditions. Exportation/release products described this document require necessary procedures accordance with regulations Foreign Exchange Foreign Trade Control Japan and/or export control laws. company names brand names herein trademarks registered trademarks their respective owners.
Edited Strategic Business Development Dept.

BIPOLAR SWITCHING REGULATOR CONTROLLER MB3769A DESCRIPT

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