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BA9741 Dataheets PDF



Part Number BA9741
Manufacturers UTC
Logo UTC
Description TWO-CHANNEL SWITCHING REGULATOR CONTORLLER
Datasheet BA9741 DatasheetBA9741 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD BA9741 LINEAR INTEGRATED CIRCUIT TWO-CHANNEL SWITCHING REGULATOR CONTORLLER  DESCRIPTION The UTC BA9741 is a two-channel switching regulator controllers that use the PWM method. It can be used for DC to DC conversion for step-up, step-down, and inverting. The IC comes in a compact package, making it ideal for use in portable equipment.  FEATURES *High-accuracy reference voltage circuit (±1%) *Time-latch, short-circuit protection circuit *Miss-operation preven.

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UNISONIC TECHNOLOGIES CO., LTD BA9741 LINEAR INTEGRATED CIRCUIT TWO-CHANNEL SWITCHING REGULATOR CONTORLLER  DESCRIPTION The UTC BA9741 is a two-channel switching regulator controllers that use the PWM method. It can be used for DC to DC conversion for step-up, step-down, and inverting. The IC comes in a compact package, making it ideal for use in portable equipment.  FEATURES *High-accuracy reference voltage circuit (±1%) *Time-latch, short-circuit protection circuit *Miss-operation prevention circuit for low-voltage input *Reference voltage with output (2.5V) *Rest period adjustment is possible over the entire duty *range  ORDERING INFORMATION Ordering Number Lead Free Halogen Free BA9741L-D16-T BA9741G-D16-T - BA9741G-S16-R - BA9741G-P16-R Package DIP-16 SOP-16 TSSOP-16 Packing Tube Tape Reel Tape Reel  MARKING DIP-16 SOP-16 / TSSOP-16 www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 7 QW-R103-017.C BA9741  PIN CONFIGURATIONS LINEAR INTEGRATED CIRCUIT  PIN DESCRIPTIONS PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME CT RT NON1 INV1 FB1 DT1 OUT1 GND VCC OUT2 DT2 FB2 INV2 NON2 SCP VREF FUNCTOIN External timing capacitor External timing resistor Positive input for error amplifier 1 Negative input for error amplifier 1 Error amplifier 1 output Output 1 dead time/soft start setting Output 1 Ground Power supply Output 2 Output 2 dead time / soft start setting Error amplifier 2 output Negative input for error amplifier 2 Positive input for error amplifier 2 Time latch setting Reference voltage output (2.5V) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R103-017.C BA9741  BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT VCC CT RT 9 12 VREF 16 Vref Reference Voltage Triangle Oscillator NON 1 3 INV 1 4 FB 1 5 NON 2 14 INV 2 13 FB 2 12 + - Err Amp 1 + - Err Amp 2 + + SCP Comp - Vref + + PWM Comp1 + + PWM Comp2 SCP 15 Vref STimeR r Latch URVL O Vref 6 11 DT1 DT2 8 GND 7 OUT1 10 OUT2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R103-017.C BA9741 LINEAR INTEGRATED CIRCUIT  ABSOLUTE MAXIMUM RATINGS (TA=25C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Power Supply Voltage VCC 36 V Output Current IO 120(note 2) mA Output Voltage VO 36 V Power Dissipation (Note 2) SOP-16 DIP-16 PD 500 mW 650 Operating Temperature TOPR -40 ~ +85 C Storage Temperature TSTG -55 ~ +125 C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. When mounted on 70mm×70mm×1.6mm glass epoxy board. Reduced by 5.0mW, for each increase in TA of 1C over 25C. 3. Should not exceed Pd and ASO values.  RECOMMENDED OPERATING CONDITIONS (TA=25C, unless otherwise specified) PARAMETER Power Supply Voltage Output Current Output Voltage Error Amplifier Input Voltage Timing Capacitor Timing Resistor Oscillator Frequency SYMBOL VCC IO VO VOM CCT RRT FOSC MIN 3.6 0.3 100 5.1 10 TYP MAX UNIT 6.0 35 V 100 mA 35 V 1.6 V 15000 pF 50 k 800 kHz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R103-017.C BA9741 LINEAR INTEGRATED CIRCUIT  ELECTRICAL CHARACTERISTICS (TA=25C, VCC=6V, unless otherwise specified) PARAMETER SYMBOL TEST CONIDITIONS REFERENCE VOLTAGE BLOCK Output Voltage Input Stability Load Stability TRIANGULAR WAVE OSCILLATOR VREF VDLI VDLO IREF =1mA VCC =3.6~35V IREF =0~5mA Oscillation Frequency Frequency Deviation PROTECTION CIRCUIT FOSC FDV RRT=10 kΩ, CCT=220pF VCC=3.6~35V Threshold Voltage VIT Standby Voltage VSTB Latch Voltage VLT Source Current ISCP Comparator Threshold Voltage VCT REST PERIOD ADJUSTMENT CIRCUIT No pull up No pull up 5Pin,12Pin Input Threshold Voltage (fosc=10kHz) Vt0 Vt100 Duty Cycle =0% Duty Cycle =100% On Duty Cycle DON Divide VREF using 13 kΩ and27 kΩ Input Bias Current IBDT DT1, DT2=2.0V Latch Mode Source Current IDT DT1, DT2=0V Latch Input Voltage VDT IDT=40µA LOW-VOLTAGE INPUT MISS-OPERATION PREVENTION CIRCUIT Threshold Voltage VUT ERROR AMPLIFIER Input Offset Voltage Input Offset Current Input Bias Current Open Circuit Gain VIO IIO IIB AV Common-mode Input Voltage range VOM VCC=3.6~35V Common-mode Rejection Ratio CMRR Maximum Output Voltage Minimum Input Voltage Output Sink Current Output Source Current VOH VOL IOI FB=1.25V IOO FB=1.25V PWM COMPARATOR Input Threshold Voltage (fosc=10kHz) OUTPUT BLOCK Saturation Voltage Leak Current Vt0 Vt100 Duty Cycle =0% Duty Cycle =100% VSAT IREAK IO=75mA VO=35V TOTAL DEVICE Standby Current Average Current Consumption ICCS When output is off ICCA RRT=10 kΩ MIN TYP. MAX UNIT 2.4 2.5 2.6 V 1 10 mV 1 10 mV 320 400 480 kHz 1% 1.48 1.64 1.80 V 50 100 mV 30 100 mV 1.5 2.5 3.5 µA 0.9 1.05 1.2 V 1.79 1.97 2.15 V 1.32 1.48 1.64 V 45 55 65 % 0.1 1 µA 200 560 µA 2.28 2.48 V 2.53 V 6 mV 30 nA 15 100 .


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