UC3842A/3843A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 9

www.unisonic.com.tw

QW-R103-002.F

ELECTRICAL CHARACTERISTICS(Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Current Sense section

Gain

(Note 2,3)

2.85

3

3.15

V/V

Maximum Input signal

Vpin 1=5V( Note 2)

0.9

1

1.1

V

PSRR

70

dB

Input Bias Current

-2

-10

μA

Delay to Output

Vpin 3=0 to 2V

150

300

ns

Output Section

0.1

0.4

V

Low

1.5

2.2

V

13

13.5

V

Output Level

High

12

13.5

V

Rise Time

50

150

ns

Fall Time

50

150

ns

Under-Voltage Lockout Output Section

3842A

14.5

16

17.5

V

Start Threshold

3843A

7.8

8.4

9

V

3842A

8.5

10

11.5

V

Min. Operating Voltage

3843A

7

7.6

8.2

V

PWM Section

MAX

95

97

100

%

Duty Cycle

Min

0

%

Total Standby Current

Start-up Current

0.12

0.3

mA

Operating Supply Current

Vpin 2=Vpin 3=0V

11

17

mA

34

V

Note:1.These parameters, although guaranteed ,are not 100% tested in production.

2. Parameters measured at trip point of latch with Vpin 2=0.

3. Gain defined as: