UC3842A Просмотр технического описания (PDF) - Fairchild Semiconductor

Номер в каталоге

Компоненты Описание

производитель

UC3842A

SMPS Controller

Fairchild Semiconductor 

UC3842A/UC3843A

Absolute Maximum Ratings

Parameter

Symbol

Value

Unit

Supply Voltage

VCC

30

V

Output Current

IO

±1

A

Analog Inputs (pin 2, 3)

VI(ANA)

- 0.3 to 6.3

V

Error Amp. Output Sink Current

ISINK(EA)

10

mA

Power Dissipation

PD

1

W

Electrical Characteristics

(VCC = 15V, RT = 10KΩ, CT = 3.3nF, TA = 0°C to + 70°C ,Unless otherwise specified)

Parameter

REFERENCE SECTION

Output Voltage

Line Regulation

Load Regulation

Output Short Circuit

OSILLATOR SECTION

Initial Accuracy

Voltage Stability

Amplitude

Discharge Current

CURRENT SENSE SECTION

Gain

Maximum Input Signal

PSRR

Input Bias Current

Delay to Output

Symbol

Conditions

VREF

∆VREF

∆VREF

ISC

TJ = 25°C, IO = 1mA

VCC = 12V to 25V

IO = 1mA to 20mA

Ta = 25°C

FOSC

STV

VOSC

IDISCHG

TJ = 25°C

VCC = 12V to 25V

VPIN4, Peak to Peak

TJ = 25°C, Pin4 = 2V

GV

VI(MAX)

PSRR

IBIAS

TD

(NOTE 2, 3)

VPIN1 = 5V(NOTE 2)

VCC = 12V to 25V (NOTE 1, 2)

-

VPIN3 = 0 V to 2V (NOTE1)

Min. Typ. Max. Unit

4.9 5.0 5.1 V

-

6 20 mV

-

6 25 mV

- - 100 - 180 mA

47 52 57 KHz

- 0.2 1 %

- 1.7 -

V

7.8 8.3 8.8 mA

2.85 3 3.15 V/V

0.9 1.0 1.1 V

- 70 - dB

- - 2 -10 uA

- 100 200 ns

2

Share Link: