ASSP Power Management Applications 8-ch DC/DC Converter with Synchrono

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

ASSP Power Management Applications 8-ch DC/DC Converter with Synchrono

Datasheet Thumbnail

Top Searches for this datasheet

DS04-27224-2Ea
ASSP Power Management Applications 8-ch DC/DC Converter with Synchronous
Rectifier Voltage Step-up Step-down
MB3881
DESCRIPTION
MB3881 step-up/step-down type 8-channel, DC/DC converter uses pulse width modulation (PWM) synchronous rectification, designed voltage, high efficiency, compactness. This ideal down conversion up/down conversion (employing step-up/step-down Zeta system enabling free setting). MB3881 channel power supply provide wide range supply voltages, allowing itself operate voltage. addition, MB3881 contains triangular wave oscillator which operate synchronization with external device, allowing switching timing controlled externally. This contributes reduction switching noise, facilitating system configuration. MB3881 designed compact using LQFP-64P package whose body size best power supply advanced portable equipment such camera integrated VTR. This product covered Patent Number 6,147,477.
FEATURES
Supporting step-up/step-down Zeta methods (CH1 CH7) Supporting synchronous rectification (CH1, CH2) start-up voltage (CH8) (Continued)
PACKAGE
64-pin plastic LQFP
(FPT-64P-M20)
Copyright©2002-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2002.9
MB3881
(Continued) Power-supply voltage range (CH1 CH7) Built-in high-precision reference voltage generator Oscillation frequency range Built-in triangular wave oscillator capable external synchronization Error amplifier output soft-start (CH1 CH4, CH7)
ASSIGNMENT
Output block
GND(O)-1
VCC(O)-2
VCC(O)-1
VSS(O)-2
GND(O)-2 DTC8 -IN8 +IN8 (CH7,CH8) -IN8(C) +IN8(C) DTC7 -IN7 +IN7 DTC6 -IN6 +IN6
VSS(O)-1
OUT2-2
OUT2-1
OUT1-2
OUT1-1
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
DTC1 -IN1 DTC2 -IN2 DTC3 -IN3 DTC4 -IN4 SYNC (CH1 CH4)
VREF
CSCP
-IN5(C)
CTL-1
CTL-2
CTL-3
-IN6(C)
(CH5,CH6)
Control block
CTL-4
DTC5
-IN5
+IN5
MB3881
DESCRIPTION
CH5, Symbol -IN1 DTC1 OUT1-1 OUT1-2 -IN2 DTC2 OUT2-1 OUT2-2 -IN3 DTC3 OUT3 -IN4 DTC4 OUT4 -IN5 +IN5 -IN5 DTC5 OUT5 -IN6 +IN6 -IN6 DTC6 OUT6 -IN7 +IN7 DTC7 OUT7 Descriptions Error amplifier output pin. Error amplifier inverted input pin. Dead time control pin. Main side output pin. Synchronous rectifier side output pin. Error amplifier output pin. Error amplifier inverted input pin. Dead time control pin. Main side output pin. Synchronous rectifier side output pin. Error amplifier output pin. Error amplifier inverted input pin. Dead time control pin. Output pin. Error amplifier output pin. Error amplifier inverted input pin. Dead time control pin. Output pin. Error amplifier output pin. Error amplifier inverted input pin. Error amplifier non-inverted input pin. Short detection comparator input pin. Dead time control pin. Output pin. Output maximum voltage setting pin. Error amplifier output pin. Error amplifier inverted input pin. Error amplifier non-inverted input pin. Short detection comparator input pin. Dead time control pin. Output pin. Error amplifier output pin. Error amplifier inverted input pin. Error amplifier non-inverted input pin. Dead time control pin. Output pin. (Continued)
MB3881
(Continued)
Symbol -IN8 +IN8 -IN8 +IN8 DTC8 OUT8 SYNC CTL-1
Error amplifier output pin.
Descriptions Error amplifier inverted input pin. Error amplifier non-inverted input pin. Short detection comparator inverted input pin. Short detection comparator non-inverted input pin. Dead time control pin. Output current setting pin. Output pin. Triangular wave frquency setting resistor connection pin. Triangular wave frquency setting capacitor connection External synchronous signal input pin. Power supply, control circuit. level Power supply operating mode "L"level Standby mode control circuit. level level operating mode level mode CH5, control circuit. level level CH5, operating mode level CH5, mode control circuit. level level operating mode level mode Short protection circuit capacitor connection pin. CH1, soft-start circuit capacitor connection pin. Reference voltage control circuit power supply pin. CH1, output circuit power supply pin. CH5, output circuit power supply pin. CH1, output circuit power supply pin. CH5, output circuit power supply pin. CH1, synchronous rectifier side output circuit power supply pin. Refernce voltage output pin. Triangular wave oscillator regulator output pin. Ground pin. CH1, output circuit ground pin. CH5, output circuit ground pin.
CTL-2
Control
CTL-3
CTL-4
Power
CSCP VREF
MB3881
BLOCK DIAGRAM
General view
-IN1 Error Amp.1 1.25 Comp.1 Comp.1-1 Comp.1-2 Drive
Drive
VCC(O)-1
OUT1-1 VSS(O)-1 VDD(O) OUT1-2
DTC1
-IN2 Error Amp.2 1.25 Comp.2 DTC2
Comp.2-1 Comp.2-2
Drive OUT2-1
Drive
OUT2-2
-IN3 Error Amp.3 1.25 Comp.3 DTC3
Comp.3
Drive OUT3
-IN4 Error Amp.4 1.25 Comp.4 DTC4
Comp.4
Drive OUT4
GND(O)-1
-IN5 Error Amp.5 Comp.5
Comp.5
Drive
VCC(O)-2
OUT5 VSS(O)-2
-IN5(C) +IN5 DTC5
-IN6 Error Amp.6 Comp.6
Comp.6
Drive OUT6
-IN6(C) +IN6 DTC6
-IN7 Error Amp.7 1.25 Comp.7 DTC7
Comp.7
Drive OUT7
+IN7
-IN8 +IN8 -IN8(C) +IN8(C) DTC8 Comp.8 Error Amp.8 Comp.8
Drive OUT8
GND(O)-2
CTL-2 CTL-3 CTL-4 Buff Buff Logic 1.73 1.73
UVLO Power ON/OFF VREF
CTL-1 (Power/CH1,
(Standby mode)
CSCP
SYNC
pin)
MB3881
Enlarged view
-IN1 Error Amp.1 1.25 Comp.1
Comp.1-1 Comp.1-2
Drive
VCC(O)-1
OUT1-1 VSS(O)-1
VDD(O) Drive OUT1-2
DTC1
-IN2 Error Amp.2 1.25 Comp.2 DTC2
Comp.2-1 Comp.2-2
Drive OUT2-1
Drive
OUT2-2
-IN3 Error Amp.3 1.25 Comp.3 DTC3
Comp.3
Drive OUT3
-IN4 Error Amp.4 1.25 Comp.4 DTC4
Comp.4
Drive OUT4
GND(O)-1
MB3881
Enlarged view
-IN5 Error Amp.5 Comp.5
Comp.5
Drive
VCC(O)-2
OUT5 VSS(O)-2
-IN5(C) +IN5 DTC5
-IN6 Error Amp.6 Comp.6
Comp.6
Drive OUT6
-IN6(C) +IN6 DTC6
-IN7 Error Amp.7 1.25 Comp.7 DTC7
Comp.7
Drive OUT7
+IN7
MB3881
Enlarged view
-IN8 +IN8 -IN8(C) +IN8(C) DTC8 Comp.8 Error Amp.8 Comp.8
Drive
OUT8
GND(O)-2
CTL-2 CTL-3 CTL-4
Logic Buff Buff 1.73 1.73
UVLO Power ON/OFF
VREF
(Power/CH1, (Standby mode) CTL-1 pin)
CSCP
SYNC
MB3881
ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Output current Output peak current Power dissipation Symbol pin, Duty Condition Rating 800* Unit
Storage temperature Tstg +125 packages mounted epoxy board cm). WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Power supply voltage Reference voltage output current Reference voltage output current CH7, VCC(O)-VSS(O) VREF +IN5, +IN6, -IN1 -IN7, -IN5 -IN6 Input voltage +IN8, -IN8, -IN8 +IN8 +IN7 Control input voltage SYNC input voltage Output current Output current setting resister Oscillator frequency Timing capacitor Timing resistor capacitor Soft-start capacitor Short detection capacitor VCTL VSYNC fOSC CSCP SYNC Condition Value -0.5 0.22 0.39 Unit
Operating ambient temperature 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.
MB3881
ELECTRICAL CHARACTERISTICS
Parameter Reference voltage Reference voltage block Output voltage temperature stability Input stability Load stability Short-circuit output current Threshold voltage
Under voltage lockout protection circuit block(U.V.L.O)
Symbol VREF VREF/ VREF Line Load VRST
Value Conditions Unit VREF VREF 2.475 1.20 0.5* 1.30 2.525 1.40
Hysteresis width Reset voltage
Threshold voltage Input standby voltage Charge current Threshold voltage Input standby voltage Input latch voltage Input source current Oscillator frequency
VSTB VSTB ICSCP fOSC f/fdv f/fdt ISYNC
1.25 -1.4 0.65 -1.4
1.45 -1.0 0.70 -1.0
1.65 -0.6 0.75 -0.6
Short circuit detection block (SCP)
Soft-start block (CS)
Input level Input level SYNC
Triangular wave oscillator block (OSC)
Frequency stability voltage Frequency stability temperature Output voltage SYNC input condition
1.980 2.000 2.020
Input current Standard design value.
(Continued)
MB3881
(Continued) Symbol Error amplifier block (CH1 CH4, CH7) Voltage gain Frequency bandwidth Output voltage Output source current Output sink current Input offset voltage temperature stability ISOURCE ISINK Conditions 1.35 (CH1 CH4, CH7) (CH7) 1.35 1.35 Value 1.23 -320 -260 -120 -120 1.35 1.35 1.25 0.5* 1.2* -2.0 0.5* 1.2* -2.0 1.27 -1.0 -1.0 Unit
Parameter Threshold voltage temperature stability
Input bias current
1.35 1.35 1.35
Error amplifier bolck (CH5, CH6)
Input bias current Common mode input voltage range Voltage gain Frequency bandwidth Output voltage Output source current Output sink current
ISOURCE ISINK
Standard design value. (Continued)
MB3881
(Continued) Parameter Input offset voltage Input bias current Common mode input voltage range Voltage gain Frequency bandwidth Output voltage Output source current Output sink current
Comp. block (CH1 CH4, SCP)
Symbol ISOURCE ISINK
Value Conditions Unit 0.55 0.55 -100 0.97 0.77 -320 0.55 -200 0.55 0.55 1.2* -2.0 1.00 0.80 0.60 -1.0 1.03 0.83 0.65
Error amplifier bolck (CH8)
Threshold voltage Input bias current Input offset voltage Input bias current Common mode input voltage range Input offset voltage (CH7) 0.55
Comp. block (CH8 SCP)
Comp. block (CH5,CH6 SCP)
Input bias current Common mode input voltage range
Comp. block (CH1 CH7)
Threshold voltage
VT100
Duty cycle Duty cycle 100%
1.73
1.83
Input bias current
IDTC
(CH1 CH7)
-1.0
-0.3
Standard design value. (Continued)
MB3881
(Continued) Parameter Symbol Threshold voltage VT100 Duty cycle 100% -2.6 -100 -110 -2.0 -1.4 Value Conditions Unit Duty cycle
Comp. block(CH8)
Output source current ISOURCE Output block (CH1 CH7) (Drive-1) Output sink current ISINK Output resistor Output block (CH1, CH2) (Drive-2) Output source current ISOURCE Output sink current Output resistor Output block (CH8) (Drive) ISINK
Duty Duty Duty Duty Duty
Output source current ISOURCE
Output sink current
ISINK
Output block (CTL-1 CTL-4) (CTL)
input condition Input current ICTL ICCS Standby current ICCS(O) IDDS Power supply current
Active mode Standby mode CTL-1 CTL-1 CTL-1 CTL-1 CTL-2 CTL-3 CTL-4 CTL-1 CTL-2 CTL-3 CTL-4
Standard design value.
General
MB3881
TYPICAL CHARACTERISTICS
Power supply current power supply voltage Power supply current (mA)
Reference voltage power supply voltage
Reference voltage VREF
CTL-1 CTL-2 CTL-3 CTL-4
CTL-1 CTL-2 CTL-3 CTL-4 VREF
Power supply voltage
Power supply voltage
Reference voltage ambient temperature
2.56
Reference voltage VREF
2.54 2.52 2.48 2.46 2.44
CTL-1 CTL-2 CTL-3 CTL-4
Ambient temperature (°C)
Reference voltage control voltage Reference voltage VREF
VREF
Control current control voltage
Control current (µA)
Control voltage VCTL-1
Control voltage VCTL-1 (Continued)
MB3881
(Continued) Triangular wave upper lower limit voltage vs.triangular wave oscillator frequency Triangular wave upper lower limit voltage
Triangular wave upper lower limit voltage ambient temperature Triangular wave upper lower limit voltage
Upper
Upper
Lower
Lower
1000
Triangular wave oscillator frequency fOSC (kHz)
Ambient temperature
Triangular wave oscillator frequency timing capacitor Triangular wave oscillator frequency fOSC (kHz)
10000
Triangular wave oscillator frequency timing resistor
10000
1000
Triangular wave oscillator frequency fOSC (kHz)
1000
1000
10000
Timing capacitor (pF) Triangular wave oscillator frequency ambient temperature
Timing resistor
Power dissipation ambient temperature Power dissipation (mW)
1000
Triangular wave oscillator frequency fOSC (kHz)
CTL-1 CTL-2 CTL-3 CTL-4
Ambient temperature
Ambient temperature (Continued)
MB3881
(Continued) Error amplifier gain phase frequency (CH1)
Phase (deg)
Gain (dB)
-180
1.26
Frequency (Hz)
Error amplifier gain phase frequency (CH5)
Phase (deg)
Gain (dB)
-180
Frequency (Hz)
Error amplifier gain phase frequency (CH8)
Phase (deg)
Gain (dB)
-180
Frequency (Hz)
MB3881
FUNCTIONS
DC-DC Converter Functions
Reference voltage generator reference voltage generator generates temperature-compensated reference voltage (typically from voltage supplied from power supply terminal (pin 27). voltage used reference voltage IC's internal circuitry. reference voltage supply load current external device through VREF terminal (pin 24). Triangular-wave oscillator circuit triangular wave oscillator incorporates timing capacitor timing resistor connected respectively terminal (pin terminal (pin generate triangular oscillation waveform (amplitude (amplitude 1.73 phase with CT), (amplitude 1.73 inverse phase with CT). input comparator Error amplifier (Error Amp.) error amplifier detects DC/DC converter output voltage outputs control signals. supports wide range in-phase input voltages from "VCC (channels allowing easy setting from external power supply. addition, arbitrary loop gain connecting feedback resistor capacitor from output inverted input error amplifier, enabling stable phase compensation system. comparator (PWM Comp.) comparator voltage-to-pulse width converter controlling output duty depending input voltage. Channels main sides, channel comparator keeps output transistor while error amplifier output voltage voltage remain higher than triangular wave voltage.
Channels synchronous rectification sides:The comparator keeps output transistor while error amplifier output voltage remain lower than triangular wave voltage. Output circuits output circuits main side synchronous rectification side both totem pole configuration, capable driving external transistor (channels main sides, channels transistor (channel N-channel MOSFET (channels synchronous rectification sides).
MB3881
Channel Control Function
Channels turned depending voltage levels CTL-1 terminal (pin 28), CTL-2 terminal (pin 29), CTL-3 terminal (pin 30),and CTL-4 terminal (pin 31). Channel On/Off Setting Conditions Voltage level Channel on/off state CTL-1 CTL-2 CTL-3 Undefined CTL-4 Power CH1, CH5,
(Standby state)
Protective Functions
Timer-latch short-circuit protection circuit short-circuit detection comparator each channel detects output voltage level and, channel output voltage falls below short-circuit detection voltage, timer circuits actuated start charging external capacitor CSCP connected CSCP terminal (pin 26). When capacitor voltage reaches about 0.70 circuit turned output transistor sets dead time 100%. reset actuated protection circuit, turn power supply back. (See "SETTING TIME CONSTANT TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT".) Undervoltage lockout protection circuit transient state momentary decrease supply voltage, which occurs when power supply turned cause malfunction, resulting breakdown degradation system. prevent such malfunctions, undervoltage lockout protection circuit detects decrease internal reference voltage with respect power supply voltage, turns output transistor, sets dead time 100% while holding CSCP terminal (pin level. circuit restores output transistor normal when supply voltage reaches threshold voltage undervoltage lockout protection circuit.
MB3881
Soft-Start Operation
Description When CTL-1 CTL-4 pins driven high ("H" level) channel-8 output voltage soft-started capacitor (C+IN8) connected +IN8 terminal (pin capacitor (Cs) connected terminal (pin starts being charged output voltages channels channel soft-started error amplifier proportion voltage. Input CTL-1 CTL-2 CTL-3 CTL-4 Output
output voltage
VREF
1.25
CH4, output voltage VO4, CH5, output voltage VO5,
CH4, soft-start interval soft-start interval
MB3881
When CTL-2 (CTL-4) terminal driven ("L" level) after channels have been soft-started capacitor (Cs) connected terminal (pin starts being charged. channel-2 (channel-7) output voltage soft-started error amplifier proportion voltage.
Input CTL-1 CTL-2 (CTL-4 CTL-3 Output
output voltage
VREF
1.25 1.25
CH1, CH3, output voltage VO1, VO3, (CH7) output voltage (VO7) CH5, output voltage VO5,
(5)' (6)'
Channel-1, soft-start interval Channel-8 soft-start interval Channel-2 (channel-7) soft-start interval Channel-2 (channel-7) soft-start interval (waveform) CTL-2 (CTL-4) goes from during channel-1, soft-start interval
MB3881
Setting Soft-start Channel-8 soft-start Channel soft-started connecting capacitor between DTC8 terminal (pin GND. softstart time depends input voltage load current. Channel channel soft-start Soft-start time ts[s] 1.25 Cs[µF] Note short-circuit detection function remains working even during soft-start operation channels Channel-5, soft-start Channel soft-started connecting capacitor between +IN5 terminal (pin GND. Channel like channel soft-started connecting capacitor between +IN6 terminal (pin GND.
SETTING OSCILLATION FREQUENCY
oscillation frequency connecting timing capacitor (CT) terminal (pin timing resistor (RT) terminal (pin 33). Oscillation frequency fOSC (kHz) 550000 (pF)
MB3881
SETTING OUTPUT VOLTAGE
-IN1 Error Amp.1 1.25
1.25
Comp.1
CH5,
-IN5 Error Amp.5
-IN5(C) +IN5
Comp.5
MB3881
-IN7 Error Amp.7
+IN7 1.25
1.25
+IN7< 1.25
+IN7
1.25 +IN7 Comp.7
-IN8 Error Amp.8
+IN8 -IN8(C) +IN8(C) Comp.8
MB3881
SAMPLE POWER SUPPLY USING CHANNEL SELF-POWER SUPPLY
Using channel self-power supply, MB3881 support wide range supply voltages operate input voltage (Vin following example shows sample power supply using transformer.
-IN8
Error Amp.8
+IN8
OUT8
VO8-1 <CCD> VO8-2 <LCD> VO8-3 <CCD> VO8-4 (-15 <LCD>
following settings used "APPLICATION EXAMPLE". VSS(O) number turnings that produces VCC(O) number turnings that produces Note that, because channels operate they must number turnings that produces more that they operate
MB3881
SETTING OUTPUT CURRENT
output circuit (drive structured illustrated below output circuit diagram). found "Output Current Waveform" below, source current value output current waveform constant current setting. Note that source current following equation: Output source current RB[A]
(O)-2
Source current
External transistor Output source current
OUT8
Output sink current Sink current
(O)-2
output circuit diagram
Output source current (Peak) Output source current Output current
Output sink current (Peak)
Output current waveform
MB3881
SETTING TIME CONSTANT TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT
short detection comparator (SCP comparator) each channel monitors output voltage. While switching regulator load conditions stable channels, LOG_SCP output remains level, transistor turned CSCP terminal (pin held level. load condition channel changes rapidly short load, causing output voltage drop, output short detection comparator that channel goes level. This causes transistor turned external short protection capacitor CSCP connected CSCP terminal charged When capacitor CSCP charged threshold voltage (VTH 0.70 latch external turned (dead time 100%). this point, latch input closed CSCP terminal held level. Short detection time (tPE) 0.70 CSCP (µF)
External transistor
-IN1 Drive OUT1-2 Comp.1 Drive OUT1-1
-IN8(C) +IN8(C)
Comp.8 LOG_SCP
Drive CSCP Timer-latch short protection circuit bias bias
OUT8
CSCP
UVLO
Power ON/OFF
CTL-1
Timer-latch short circuit protection circuit
MB3881
SETTING EXTERNAL SYNCHRONOUS OSCILLATION
external synchronous operation, connect timing capacitor (CT) terminal (pin timing resistor (RT) terminal (pin 33). this case, select that oscillation frequency lower than frequency external synchronous signal excluding setting error oscillation frequency. duty cycle (T1/T) external synchronous signal must within range from 90%. Triangular wave oscillator (OSC) equivalent circuit
Latch1
level:
SYNC
Proportional VRT/RT
Latch2
External synchronization circuit Free-run oscillation
VSYNC
External synchronous oscillation
VSYNC
Note: external synchronous pulse input, device started with free-run oscillation. free-run oscillation, SYNC terminal (pin "Lo" "HiZ" level. external synchronization circuit starts operation after VREF rise. oscillation frequency startup when voltage terminal (pin with triangular wave superimposed noise during external synchronous oscillation, insert filter.
MB3881
TREATMENT WITHOUT USING CSCP
When timer-latch short protection circuit, connect CSCP terminal (pin with shortest distance
CSCP
Treatment when using CSCP
TREATMENT KILLING SOFT-START FEATURE
disable channel soft-start function, leave terminal (pin open. disable channel soft-start function, remove capacitor from +IN8 terminal (pin 16).
"Open"
+IN8
When soft-start time
MB3881
SETTING DEAD TIME
When device step-up inverted output based step-up step-up/down Zeta method flyback method, voltage reach exceed rectangular wave voltage load fluctuation. this case, output transistor fixed full-ON state duty 100%). prevent this, maximum duty output transistor. voltage DTC1 terminal (pin applying resistive voltage divider VREF voltage shown below. When voltage DTC1 terminal (pin higher than triangular wave voltage (CT1), output transistor turned maximum duty calculation formula assuming that triangular wave amplitude 0.73 triangular wave minimum voltage given below. (Same other channels.) DUTY (ON) max= 100[%], 0.73 VREF
When DTC1 terminal (pin used, connect directly VREF terminal (pin shown below. (Same other channels.)
VREF DTC1
When using dead time (Same other channels.) CH1)
VREF DTC1
When soft-start time Same other channels.)
MB3881
APPLICATION EXAMPLE
General view
VCC(O)-1 OUT1-1 2200 VSS(O)-1 VDD(O) OUT1-2 (2.0
-IN1
DTC1
3900 (2.8
OUT2-1
-IN2
OUT2-2 (5.0 3900
DTC2
OUT3
-IN3
DTC3
(5.0 3900
OUT4
-IN4
DTC4
GND(O)-1 VCC(O)-2 OUT5 VSS(O)-2 (DRUM)
(3.6 -IN5(C)
Motor control signal
-IN5
(CAP)
+IN5 DTC5
-IN6 -IN6(C)
Motor control signal
OUT6
+IN6 Over voltage threshold
setting voltage
DTC6
(B.L)
OUT7 2200
-IN7
+IN7
Back light luminousity switching signal
DTC7
-IN8 +IN8
VSS(0) (1.8 Vo8-1 <CCD> Vo8-2 <LCD> Vo8-3 <CCD> Vo8-4 (-15 <LCD>
VCC(0) (5.8
OUT8
-IN8(C)
+IN8(C)
DTC8
GND(O)-2
CTL-2 CTL-3 CTL-4
Synchronous signal
CTL-1
(Power/CH1, (Standby mode)
SYNC 3V5V
CSCP
VREF
pin)
MB3881
Enlarged view
(2.0
VCC(O)-1 OUT1-1 2200 VSS(O)-1 VDD(O) OUT1-2
-IN1
DTC1
3900 (2.8
OUT2-1
-IN2
OUT2-2 (5.0 3900
DTC2
OUT3
-IN3
DTC3
(5.0 3900
OUT4
-IN4
DTC4
GND(O)-1
MB3881
Enlarged view
(DRUM)
(3.6 VCC(O)-2 OUT5 VSS(O)-2
-IN5 -IN5(C)
Motor control signal
+IN5 DTC5
-IN6(C)
Motor control signal
(CAP)
OUT6
-IN6
+IN6 Overvoltage threshold
setting voltage
DTC6
(B.L)
OUT7 2200
-IN7
+IN7
Back light luminousity switching signal
DTC7
MB3881
Enlarged view
-IN8 +IN8
VSS(0) (1.8 Vo8-1 <CCD> Vo8-2 <LCD> Vo8-3 <CCD> Vo8-4 (-15 <LCD>
VCC(0) (5.8
OUT8
+IN8(C) DTC8
-IN8(C)
GND(O)-2
CTL-2 CTL-3 CTL-4 CSCP
CTL-1
(Power/CH1, Standby mode pin)
Synchronous signal SYNC
3V5V
VREF
MB3881
PARTS LIST
COMPONENT L10, R18,
ITEM
SPECIFICATION VCEO VCEO VDSS 0.42 (Max) 0.77 (Max) 2200 3900 2200 0.69 74.5 35.4 74.5 35.4 74.5 0.69 74.5 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16
VENDOR SANYO SANYO Fairchild ORIGIN ORIGIN SUMIDA
PARTS CPH3106 CPH3206 NDS355AN F1J2H F02J9 SLF6028T-330MR69 SLF6028T-150M1R0 SLF6028T-6R8M1R5 SLF6028T-150M1R0 SLF6028T-6R8M1R5 SLF6028T-150M1R0 SLF6028T-330MR69 SLF6028T-150M1R0 CLQ72B
Diode Diode Coil Coil Coil Coil Coil Coil Coil Coil Transformer Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Ceramics Condensor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor
(Continued)
MB3881
(Continued) COMPONENT
ITEM
SPECIFICATION 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16
VENDOR
PARTS
Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor
Note SANYO SANYO Electric Co., Ltd. Fairchild Fairchild Semiconductor Corporation ORIGIN Origin Electric Co., Ltd. Corporation SUMIDA Sumida Electric Co., Ltd.
MB3881
REFERENCE DATA
Conversion efficiency load current (CH1 Down conversion method with synchronous rectification)
2200 (2.0
Conversion efficiency
OUT1-1
OUT1-2
output
Load current (mA) Conversion efficiency load current (CH2 Zeta method with synchronous rectification)
3900 (2.8
Conversion efficiency
OUT2-1
OUT2-2
output
Load current (mA)
(Continued)
MB3881
(Continued) Conversion efficiency load current (CH3 Zeta method
3900 (5.0
Conversion efficiency
OUT3
ouputt
Load current (mA)
MB3881
USAGE PRECAUTION
Never setting exceeding maximum rated conditions.
Exceeding maximum rated conditions cause permanent damage LSI. Also, recommended that recommended operating conditions observed normal use. Exceeding recommended operating conditions adversely affect reliability.
this device within recommended operating conditions.
Recommended operating conditions values within which normal operation warranted. Standard electrical characteristics warranted within range recommended operating conditions within listed conditions each parameter.
Printed circuit board ground lines should with consideration common impedance. Take appropriate static electricity measures.
Containers semiconductor materials should have anti-static protection made conductive material. After mounting, printed circuit boards should stored shipped conductive bags containers. Work platforms, tools, instruments should properly grounded. Working personnel should grounded with resistance between body ground.
apply negative voltages.
negative voltages below -0.3 create parasitic transistors lines, which cause abnormal operation.
ORDERING INFORMATION
Part number MB3881PFF Package 64-pin plastic LQFP (FPT-64P-M20) Remarks
MB3881
PACKAGE DIMENSION
64-pin plastic LQFP (FPT-64P-M20)
9.00±0.20(.354±.008)SQ 7.00±0.20(.276±.008)SQ
1.60(.063)MAX 1.40±0.10 (.055±.004) 0.10±0.10 (.004±.004)
Details part
0.10(.004) INDEX
(1.00(.039))
3.5°±3.5° 0.127(.005)
0.50±0.20 (.020±.008)
0.40(.016)
0.16±0.03 (.006±.001)
2000 FUJITSU LIMITED F64031S-1c-1
Dimensions (inches)
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 Management Applications 8-ch DC/DC Converter with Synchrono

Top Searches for this datasheet

Other recent searches