UC3842A-D08-T Просмотр технического описания (PDF) - Unisonic Technologies

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UC3842A-D08-T

CURRENT MODE PWM CONTROL CIRCUITS

Unisonic Technologies 

UC3842A/3843A

LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS(Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

Current Sense section

Gain

Maximum Input signal

PSRR

GV

VI(MAX)

(Note 2,3)

Vpin 1=5V( Note 2)

12≦VCC≦25V

Input Bias Current

Delay to Output

IBIAS

Vpin 3=0 to 2V

Output Section

Output Level

Low

VOL

High

VOH

Rise Time

tR

Fall Time

tF

Under-Voltage Lockout Output Section

IO(SINK)=20mA

IO(SINK)=200mA

IO(SOURCE)=20mA

IO(SOURCE)=200mA

TJ=25°C,CL=1nF(Note 1)

TJ=25°C,CL=1nF(Note 1)

Start Threshold

3842A

3843A

VTH(ST)

3842A

Min. Operating Voltage 3843A VOPR(MIN) After Turn On

PWM Section

Duty Cycle

Total Standby Current

MAX

Min

D(MAX)

D(MIN)

Start-up Current

IST

Operating Supply Current

ICC(OPR) Vpin 2=Vpin 3=0V

VCC Zener Voltage

Vz ICC=25mA

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:

∆Vpin 1

A=

; 0≦Vpin3≦0.8V

∆Vpin 3

4. Adjust VCC above the start threshold before setting at 15V.

MIN TYP MAX UNIT

2.85 3 3.15 V/V

0.9 1 1.1 V

70

dB

-2 -10 µA

150 300 ns

0.1 0.4 V

1.5 2.2 V

13 13.5

V

12 13.5

V

50 150 ns

50 150 ns

14.5 16 17.5 V

7.8 8.4 9

V

8.5 10 11.5 V

7 7.6 8.2 V

95 97 100 %

0

%

0.12 0.3 mA

11 17 mA

34

V

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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QW-R103-002,D

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