www.fairchildsemi.com

© 2007 Fairchild Semiconductor Corporation

SG6848x1 • Rev. 2, Feb-2020

4

NOT RECOMMENDED FOR NEW DESIGNS

Pin Configurations

Figure 4.

SSOT-6 Pin Configuration

Figure 5.

DIP-8 Pin Configuration

Pin Definitions

DIP

Pin #

SSOT

Pin #

Name

Description

1

6

GATE The totem-pole output driver for driving the power MOSFET

2

5

VDD

Power supply

3

NC

No connection

4

4

SENSE

Current sense. This pin senses the voltage across a resistor. When the voltage reaches

the internal threshold, PWM output is disabled. This activates over-current protection.

This pin also provides current amplitude information for current-mode control.

5

3

RI

A resistor connected from the RI pin to ground generates a constant current source

used to charge an internal capacitor and determine the switching frequency. Increasing

the resistance reduces the amplitude of the current source and the switching frequency.

frequency.

6

NC

No connection

7

2

FB

Feedback. The FB pin provides the output voltage regulation signal. It provides

feedback to the internal PWM comparator, so that the PWM comparator can control the

duty cycle.

8

1

GND

Ground