FA13842, 13843, 13844, 13845

1

s Description

The FA1384X series are CMOS current mode control ICs for

off-line and DC-to-DC converters.

These ICs can reduce start-up circuit loss and are optimum for

high efficiency power supplies because of the low power

dissipation achieved through changes in the CMOS fabrication

process.

These ICs can drive a power MOSFET directly.

The high-performance, compact power supply can be

designed with minimal external components .

s Features

• CMOS process

• Low-power dissipation

• Standby current 2

µA (max.), start-up current 30µA (max.)

• Pulse-by-pulse current limiting

• 5V bandgap reference

• UVLO (Undervoltage lockout) with hysteresis

• Maximum duty cycle

FA13842, 13843: 96%

FA13844, 13845: 48%

• Pin-for-pin compatible with UC384X

Note:

Pins are fully compatible, but characteristics are not.

When our ICs are applied to a power supply circuit

designed for other manufactures' 384X series, the

characteristics and safety features of the power supply

must be checked.

s Types of FA1384X series

FA13842,13843,13844,13845

CMOS IC

For Switching Power Supply Control

s Dimensions, mm

SOP-8

4.9

1

4

8

5

DIP-8

1

8

5

4

9.3

7.62

1.5

0~15˚

0~15˚

0.25

+0.1

–0.05

Type

UVLO

Maximum duty Package

Start threshold Stop threshold cycle

FA13842P 16.5V

±1V

9V

±1V

96%

DIP

FA13842N

SOP

FA13843P

9.6V

±1V

9V

±1V

96%

DIP

FA13843N

SOP

FA13844P 16.5V

±1V

9V

±1V

48%

DIP

FA13844N

SOP

FA13845P

9.6V

±1V

9V

±1V

48%

DIP

FA13845N

SOP