USRB04

Preliminary

CMOS IC

UNISONIC TECHNOLOGIES CO., LTD

4 of 6

www.unisonic.com.tw

W-3-

.a



ABSOLU T E M AX I M U M RAT I N GS

PARAMETER

SYMBOL

RATINGS

UNIT

-0.3 ~ 20

V

C-B Voltage

700

V

CS Input Voltage

-0.3 ~ 7

V

FB Voltage

-0.3 ~ 20

V

Operating Ambient Temperature

-40 ~ +85

°C

Min/Max Operating Junction Temperature

-40 ~ +150

°C

Min/Max Storage Temperature

-55 ~ +150

°C

Note: 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.



С, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Start up Current

10

uA

CS=0.5V

1.5

2

mA

Operation current

FB=6V

0.4

mA

3

3.7

3.9

V

10.5

11.5

12.5

V

14

15

16

V

FB Regkulation Voltage

5.15

V

Current Sense Input Section

LEB Time

0.25

0.3

0.35

us

Over Current Threshold

550

575

600

mV

Short Current Protection

Threshold

Voltage

0.6

0.7

0.8

V

CS floating Protection Threshold Voltage

0.9

1

1.1

V

OCP Propagation Delay

50

100

ns

EA Section

Reference Voltage for Feedback Threshold

1.44

1.5

1.56

V

FB divider coefficient

3.43

Frequency Section

IC Maximum Frequency IC Maximum

Frequency

36

40

44

KHz

Frequency Shuffling Range

±8

%

Shuffling Frequency

F_Shuffling

78

Hz

Maximum Duty Cycle

7

11

15

%

Burst Mode Switch Frequency

F_Burst

20

KHz

Base Driver Section

Base Sourcing Maximum Current

90

mA

Base Sourcing Maximum Current After

Pre-off

3

mA

Protection Section

FB Pin Open Loop Detection Voltage

0.515

V

For Exiting Over Temperature protection

125

°C

For Entering Over Temperature Protection

OTP

150

°C

Power BJT Section

Collector-Emitter Breakdown Voltage

450

V

Collector-Base Breakdown Voltage

700

V

Collector Peak Current

1

A