BA9741 datasheet(4/5 Pages) ETL

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UTCBA9741

LINEAR INTEGRATED CIRCUIT

UTC UNISONIC TECHNOLOGIES CO., LTD. 4

QW-R103-017,B

PARAMETER

SYMBOL

TEST CONIDITIONS

MIN

TYP. MAX UNIT

On Duty Cycle

DON

Divide Vref using 13 k

Ω and27 kΩ

Input Bias Current

IBDT

DT1,DT2=2.0V

0.1

Latch Mode Source Current

IDT

DT1,DT2=0V

200

560

Latch Input Voltage

VDT

IDT=40µA

2.28

2.48

LOW-VOLTAGE INPUT MISS-OPERATION PREVENTION CIRCUIT

Threshold Voltage

VUT

2.53

ERROR AMPLIFIER

Input Offset Voltage

VIO

Input Offset Current

IIO

Input Bias Current

IIB

100

Open Circuit Gain

Common-mode Input Voltage range

VOM

Vcc=3.6~35V

0.3

1.6

Common-mode Rejection Ratio

CMRR

Maximum Output Voltage

VOH

2.3

2.5

Minimum Input Voltage

VOL

0.7

0.9

Output Sink Current

IOI

FB=1.25V

Output Source Current

IOO

FB=1.25V

PWM COMPARATOR

Vt0

Duty Cycle =0%

1.79

1.97

2.15

Input Threshold Voltage

(fosc=10kHz)

Vt100

Duty Cycle =100%

1.32

1.48

1.64

OUTPUT BLOCK

Saturation Voltage

VSAT

Io=75mA

0.8

1.2

Leak Current

IREAK

Vo=35V

TOTAL DEVICE

Standby Current

Iccs

When output is off

1.3

1.8

Average Current Consumption

IccA

RRT=10 k

Ω

1.6

2.3

TIMING CHART

1.97V

1.05V

1.48V

1.64V

2.53V

tDT

Vcc 3.6V

Triangular wave output(from oscillator)

Error amplifier output

Dead-time input voltage

Short protection comparator

PWM comparator output

Output waveform

SCP waveform

Short protection comparator output

Power supply voltage

Lockout release

Figure. 1

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