IL3842

PIN FUNCTION DESCRIPTION

Pin

No.

Function

Description

1

Compensation

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

2

Voltage Feedback

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

power supply outpul through a resistor divider.

3

Current Sense

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

information to terminate the output switch conduction

4

RT/CT

The Oscillator frequency and maximum Output duty cycle are programmed by connecting

5

GND

This pin is the combined conlrol circuitry and power ground

6

Output

This output directly drives the gate of a power MOSFET. Peak currents up to 1,0A are

sourced and sunk by this pin.

7

Vcc

This pin is the positive supply of the control IC.

8

ABSOLUTE MAXIMUM RATINGS

Characteristic

Symbol

Value

Unit

Total Power Supply and Zener Current

30

mA

Output Current

±1.0

A

Output Energy (Capacitive Load per Cycle)

W

5.0

µJ

Error Amp Output Sink Current

10

mA

Current Sense and Voltage Feedback Inputs

Vin

-0.3 to 5.5

V

0.862

W

Thermal Resistance,Junction-to-Air

145

°C/W

Operating Junction Temperature

+150

Storage Temperature Range

-65 ~ +150

2