ASSP Power Supplies BIPOLAR Switching Regulator Controller

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ASSP Power Supplies BIPOLAR Switching Regulator Controller

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DS04-27205-7Ea
ASSP Power Supplies
BIPOLAR
Switching Regulator Controller
MB3782
DESCRIPTION
FUJITSU MICROELECTRONICS MB3782 PWM-type switching regulator controller, designed with opencollector output connection external drive transistors coils, providing selection three types output voltage: step-up, step-down inverting (inverting output available circuit only). MB3782 features identical oscillator output waveforms enable completely synchronous operation prevent occurrence low-frequency beat between channels. Also, MB3782 features power dissipation (2.1 Typ) built-in standby mode µA), making possible configuration wide variety high-efficiency, stable power supplies, even with battery power. MB3782 ideal power supply high-performance portable devices such video camcorders cameras.
FEATURES
Wide voltage range (3.6 power dissipation (operating mode: (Typ), standby mode: (Max) Wide range oscillator frequencies, high-frequency capability kHz) On-chip timer-latch type short detection circuit On-chip undervoltage lockout circuit On-chip 2.50 reference voltage circuit (1.25 output available pin) Dead time adjustment over full duty cycle range On-chip standby mode (power on/off function) type package (SOP-20pin type)
APPLICATIONS
monitor/panel Surveillance camera etc.
Copyright©1995-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2006.5
MB3782
ASSIGNMENT
VIEW
VREF DTC1 PUT1 OUT2 DTC3 OUT3 DTC2
(FPT-20P-M01)
DESCRIPTION
Name VREF Description 2.50 (typ) voltage output: provides load current error amplifier reference input dead time setting. Oscillator timing capacity connection: should used capacity range 15000 Oscillator timing resistor connection: should used resistance range This also provide output voltage level VREF/2, error amplifier reference input. Error amplifier non-inverting input pin. Error amplifier inverting input pin. Error amplifier output pin: connect resistor capacitor between this -IN1 gain adjust frequency characteristics. OUT1 dead time setting pin: VREF voltage divided external resistor applied dead time. Also, capacitor connected between this perform soft start operations. (Continued)
+IN1 -IN1
DTC1*1
MB3782
(Continued) Name VOUT1 OUT2 Description Open collector type output with emitter connected GND. Output current Ground Open collector type output with emitter connected GND. Output current Used OUT2 dead time. VREF voltage divided external resistor applied dead time. Also, capacitor connected between this perform soft start operations. Error amplifier output pin: connect resistor capacitor between this -IN2 gain adjust frequency characteristics. Error amplifier inverting input pin. Time constant setting capacitor connection timer-latch type short prevention circuit: capacitor should connected between this pin. details, Setting Time Constant Timer-Latch Type Short Prevention Circuit." Open collector type output emitter connected GND. Output current Used OUT3 dead time. VREF voltage divided external resistor applied dead time. Also, capacitor connected between this perform soft start operations. Error amplifier output pin: connect resistor capacitor between this -IN3 gain adjust frequency characteristics. Error amplifier inverting input pin. Power supply control pin: level places standby mode reduces power consumption lower. Input level driven CMOS. Power supply pin: voltage range
DTC2*
-IN2
SCP*2
OUT3
DTC3*
-IN3
Dead Time Control Short Circuit Protection
MB3782
BLOCK DIAGRAM
VREF
1.25
Triangular wave oscillator
Reference voltage source
Power on/off control circuit
Error DTC1
Comp.1 Ch.1
OUT1
Error
Comp.2
1.25
Ch.2
OUT2
DTC2
Error
Comp.3
1.25
Ch.3
OUT3
DTC3
Comp. VREF
Latch
U.V.L.O.
MB3782
FUNCTIONAL DESCRIPTIONS
Reference Voltage Source reference voltage source uses voltage provided (pin generate temperaturecompensated reference voltage 2.50 which used operating power supply internal circuits reference voltage source output through VREF (pin Triangular Wave Oscillator connecting timing capacitor resistor respectively (pin (pin oscillator provide triangular waveform desired frequency. waveform amplitude connected non-inverting input onchip comparator also output through (pin Error Amps error amps amplifiers that detect output voltage switching regulator send control signal. common-mode input voltage range 1.05 1.45 that voltage applied non-inverting input reference voltage should either voltage obtained dividing reference voltage output (recommended value: VREF/2) voltage obtained from (pin (1.25 non-inverting input error amps internally connected VREF/2 voltage. Also, feedback transistor capacitor connected between error output inverting input provide desired level loop gain, enabling stable phase compensation. Timer Latch (S-R Latch) Type Short Prevention Circuit timer-latch type short prevention circuit detects output levels from each error amps. Whenever more error amps produces output level higher, timer circuit activated starting charging external protection enabler capacitor. error output voltage does return normal range before voltage this capacitor reaches transistor's base-emitter junction voltage (VBE 0.65 V)), latch circuit will operate turn output transistor same time dead time 100%. Once prevention circuit activated, power must switched again resume normal operation. Input Voltage Fault Prevention Circuit (Under Voltage Lock-Out (UVLO) function) When power switched excess power momentary drops power line current cause operating faults controller which turn lead damage deterioration systems. input voltage fault prevention circuit detects internal reference voltage level with respect power supply voltage level acts reset latch circuit, thereby turning output transistor same time setting dead time 100% holding (pin "low." Operation returns normal when power supply voltage reaches exceeds UVLO threshold voltage level. Comparator comparator voltage comparator with inverting non-inverting inputs, which acts voltage pulse width converter controlling on-time output pulse according input voltage level. When triangular waveform produced oscillator lower than either error output voltage, output transistor switched also possible terminal provide soft start function. Output Transistor output open-collector type, with emitter output transistor connected pin. power transistor external switching carry base current Power Supply Control Power supply on/off control enabled through (pin 19). standby mode, power supply current less.)
MB3782
ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Error input voltage Dead time control input voltage Control input voltage Collector output voltage Collector output current Allowable loss Operating ambient temperature Storage temperature Symbol VCTL VOUT IOUT Tstg
Condition +25°C Version
Rating -0.3 -0.3 -0.3 +2.8 740* +125
Unit
operation conditions where +25°C, version should derated mW/°C. When mounted cm-square dual-sided epoxy board. WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage Error input voltage Control input voltage Collector output voltage Collector output current Reference voltage output current Timing capacitance Timing resistance Oscillator frequency Operating ambient temperature Symbol VCTL VOUT IOUT IREF fOSC Condition Value 1.05 18.0 1.45 15000 Unit
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.
MB3782
ELECTRICAL CHARACTERISTICS
(VCC +25°C) Value Unit 2.50 ±0.2 2.72 2.60 0.65 -1.0 2.55 0.70 -0.6 2.25
Parameter Reference voltage Output voltage Output voltage temperature variation Input stability Load stability Short output current Threshold voltage Hysteresis width Reset voltage (VCC) Input threshold voltage Input standby voltage Input latch voltage Input source current Comparator threshold voltage Oscillator frequency Frequency deviation Frequency deviation (VCC) Frequency deviation (Ta) Input threshold voltage duty cycle Input bias current Latch mode sink current Latch input voltage
Symbol VREF VRTC Line Load VHYS VtPC VSTB Ibpc fOSC fdev Vt100 Ibdt
Conditions -30°C +85°C -0.1 VREF -0.1 -0.1 -0.1 pull-up pull-up -30°C +85°C Duty cycle Duty cycle VR/1.45
2.45 0.60 -1.4 1.05
Dead time controller Triangular wave Short circuit protection Undervoltage lock oscillator (DTC) (SCP) circuit (UVLO)
(Continued)
MB3782
(Continued) Parameter Input offset voltage Input offset current Input bias current Common mode input voltage range Error amps Voltage gain Frequency bandwidth Common mode rejection ratio Maximum output voltage range Output sink current Output source current comparator Input threshold voltage Input sink current Input source current Input conditions Input conditions Control current Output leak current Output saturation voltage Standby current Average feed current Symbol VICR CMRR VOM+ VOMIOM+ IOMVt0 Vt100 IIN+ IINVOFF ICTL Leak VSAT ICCS ICCa VCTL VOUT IOUT VCTL VCTL VCC, output load VOUT VOUT Duty cycle Duty cycle Conditions VOUT VOUT VOUT (VCC +25°C) Value Unit -100 +100 1.45 2.25
-100 -500 1.05 VREF -0.3 1.05
Notes Voltage control channel positive negative. non-inverting input error amps channel channel internally connected VREF/2, therefore voltage control positive only. VREF/2 output obtained from pin.
Entire Output device block
Control block
MB3782
SETTING TIME CONSTANT TIMER-LATCH TYPE SHORT PREVENTION CIRCUIT
Figure shows configuration protection latch circuit. output lines from error amps each connected inverting input lines short protection comparator, which constantly compares them with reference voltage approximately connected non-inverting input. When load conditions switching regulator stabilized, there variation output from error amps, therefore short prevention controls held equilibrium. this situation, voltage (pin held approximately When load conditions change rapidly, case load short, high potential signal (greater than 2.1V) from error amps input inverting signal input short protection comparator, short protection comparator outputs "low" level signal. transistor consequently switched off, that short protection capacitor externally connected voltage then charged according following formulas. 10-6/CPE 0.65 10-6/CPE tPE/0.6 (µF) When short protection capacitor charged level approximately 0.65 latch input voltage fault prevention circuit enabled, turning output drive transistor off. same time, dead time 100% (pin held "low." This closes latch input then discharges capacitor
2.50 S.C.P.Comp. Error Error Error U.V.L.O. Comp.
Latch
Figure
Protection Latch Circuit
MB3782
SETTING OUTPUT VOLTAGE
following diagrams show connections used output voltage. Because power supply error amps provided same reference voltage circuit used other internal circuits, common-mode input voltage range 1.05 1.45 reference voltage input pins should 1.25 (VREF/2). method connection channel different from channel channel addition, channel capable picking both positive negative voltages, while channel channel pick only positive output voltages.
VREF VREF
Figure Error (channel connection: Output voltage positive
VREF VREF VREF
Figure Error (channel connection: Output voltage positive
MB3782
1.25
12,17
1.25
Figure Error (channel channel connection
non-inverting input error amps channel channel internally connected VREF/2, therefore cannot configured inverting output. ch.1 ch.2 ch.3 Step Step down Inverting
MB3782
USING
triangular waves, shown Figure oscillator frequency charging discharging capacitor connected using current value resistor connected pin. addition, when voltage level VREF/2 output external circuits from pin, care must taken making external circuit connections adjust fact that increased value current external circuits determining oscillator frequency (see Figure
Triangular wave oscillator VREF VREF
Figure VREF/2 connection external circuits from
Triangular wave generator VREF external circuits VREF
Figure
VREF/2 connection external circuits from
MB3782
TREATMENT UNUSED ERROR AMPS
error amps that used should handled follows. Note that failure apply proper treatment error amps will cause circuit activate disable switching regulator output.
Error (channel
VREF DTC1
Note: shoud left open.
Error (channel
VREF
DTC2
Note: shoud left open.
Error (channel
VREF DTC3
Note: shoud left open.
MB3782
TREATMENT UNUSED
When timer latch short protection circuit used, (pin should connected shortest possible path.
MB3782
TEST CIRCUIT
OUTPUT OUTPUT
TEST INPUT
TEST INPUT TEST INPUT OUTPUT
MB3782
TIMING CHART (INTERMAL WAVEFORMS)
wavefoms Short protection comparator reference input Dead time,PWM input voltage Error output
"High"
comparator output Output transistor-collector waveforms
"Low" "High" "Low"
Dead time
waveforms
"High"
Short protection comparator output
"Low"
Power
Power
Control voltage (VCTL: minimum value)
3.6V
Power supply voltage (VCC: minimum)
Protection enable time (µs)
MB3782
EXAMPLE APPLICATION
4.7k
(6V)
0.033
+IN1 -IN1
VREF
DTC1
DTC2
DTC3 OUT1
(-5V)
0.033 -IN2 -IN3
OUT2
(+5V)
0.033
MB3782
(+12V)
OUT3
MB3782
TYPICAL CHARACTERISTICS CURVES
Reference voltage Power supply voltage
Reference voltage VREF
Average feed current Power supply voltage
Average feed current (mA)
+25°C
+25°C
Power supply voltage Reference voltage Operating ambient temperature 2.51 VCTL 2.50 2.49 2.48 2.47 2.46 2.45
Power supply voltage
Triangular wave maximum amplitude voltage Timing capacitance
Triangular wave maximum amplitude voltage
Reference voltage VREF
+25°C
Operating ambient temperature (°C)
Timing capacitance (pF)
Collector saturation voltage Sink current
Collector saturation voltagre
Error maximum output voltage amplitude
+25°C
Error maximum output voltage amplitude Frequency +25°C
Sink current (mA)
Fequency (Hz)
(Continued)
MB3782
Oscillator frequency Timing resistance +25°C +25°C
Triangular wave period Timing capacitance
Oscillator frequency fOSC (Hz)
Triangular wave period (µs)
15000
1500 Timing capacitance (pF)
Timing resistance Frequency variation Operating ambient temperature duty cycle Oscillator frequency 1330 +25°C
Frequency variation
duty Cycle
+100 +120
Oscillator frequency (Hz)
Operating ambient temperature (°C) Reference voltage Control input voltage +25°C Control input current Control input voltage
Reference voltage VREF
Control input current ICTL (µA)
+25°C
Control input voltage VCTL
Control input voltage VCTL
(Continued)
MB3782
Voltage gain phase Frequenncy Voltage gain (dB) open Voltage gain (dB)
Voltage gain phase Frequenncy 0.047
-180
Phase (deg)
-180
Frequenncy (Hz) Voltage gain phase Frequenncy Voltage gain (dB) Voltage gain (dB)
Frequenncy (Hz) Voltage gain phase Frequenncy 4700
Phase (deg)
-180
-180
Frequenncy (Hz) Test Circuit VREF VREF
Frequenncy (Hz)
Error
(Continued)
Phase (deg)
Phase (deg)
MB3782
(Continued)
Allowable loss Operating ambient temperature Allowable loss (mW) 1200 1110 1000 version
Operating ambient temperature (°C)
MB3782
CONCERNING EQUIVALENT SERIES RESISTANCE STABILITY SMOOTHING CAPACITORS
DC/DC converters, equivalent series resistance value (ESR) smoothing capacitors major influence loop phase characteristics. means which phase characteristics approximate phase relationships ideal capacitors highfrequency bands (see Graph thus improving system stability. same time, smoothing capacitors with reduces system stability, that care must taken when using semiconductor electrolytic capacitors (OS-CONTM*) tantalum capacitors with ESR. OS-CON trademark Sanyo Electric Co., Ltd.
Figure Basic circuit step-down voltage DC/DC converter
Gain frequency
Phase frequency
Phase (deg) Gain (dB)
Frequency (Hz)
Frequency (Hz)
Graph
Gain phase frequency
MB3782
Reference data Changing smoothing capacitor from aluminum electrolytic capacitor 1.0) lower-ESR semiconductor electrolytic capacitor (OS-CONTM: decreases phase margin (see Graphs
phase characteristics measured between these points
VREF/2 Error
Figure Measurement DC/DC Capacitor Phase Characteristics
Graph
DC/DC converter output Gain Phase Frequency
Phase (deg) Aluminum electrolytic capacitor fosc
Gain (dB)
Frequency (Hz)
Graph
DC/DC converter output Gain Phase Frequency Gain (dB) Phase (deg)
OS-CON22 fosc
Frequency (Hz)
MB3782
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 MB3782PF- MB3782PF-E1 Package plastic (FPT-20P-M01) plastic (FPT-20P-M01) 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)
MB3782
XXXX
INDEX Lead Free version SOP-20
MB3782
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
MB3782
MB3782PF-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
MB3782
PACKAGE DIMENSION
20-pin plastic Lead pitch Package width package length Lead shape Sealing method Mounting height Weight 1.27 12.7 Gullwing Plastic mold 2.25 0.28
(FPT-20P-M01)
Code (Reference)
20-pin plastic (FPT-20P-M01)
*112.70 -0.20 .500 -.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)
0.25(.010) 0~8°
1.27(.050)
0.47±0.08 (.019±.003)
0.13(.005)
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 F20003S-c-7-7
Dimensions (inches). Note: values parentheses reference values.
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.

ASSP Power Supplies BIPOLAR Switching Regulator Controller

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