CURRENT MODE PWM CONTROLLER

AP384XC

Data Sheet

2

Sep. 2006 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

Figure 2. Pin Configuration of AP3842C/3C/4C/5C (Top View)

Pin Configuration

Pin Description

Pin Number

Pin Name

Function

1

COMP

This pin is the Error Amplifier output and is made available for loop compensation.

The inverting input of the Error Amplifier. It is normally connected to the switching

power supply output through a resistor divider.

A voltage proportional to inductor current is connected to this input. The PWM uses

this information to terminate the output switch conduction.

The Oscillator frequency and maximum output duty cycle are programmed by con-

ble.

5

GND

The combined control circuitry and power ground.

6

OUTPUT

This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A are

sourced and sunk by this pin.

The positive supply of the control IC.

P/M Package

(DIP-8/SOIC-8)

COMP

8

7

6

OUTPUT

5

GND

1

2

3

4