© 2011 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN6863W • Rev. 1.0.1

3

Marking Information

Figure 3. Top Mark

Pin Configuration

Figure 4. Pin Configuration

Pin Definitions

Pin #

Name

Function

Description

1

GND

Ground

Ground

2

FB

Feedback

The FB pin provides the output voltage regulation signal. It provides feedback to

the internal PWM comparator, so the PWM comparator can control the duty

trigger level and persists at that level, the controller stops and restarts.

3

RT

Temperature

Detection

An external NTC thermistor is connected from this pin to the GND pin. The

impedance of the NTC decreases at high temperatures. If the voltage of the RT

pin drops below the threshold, PWM output is disabled.

4

SENSE Current Sense

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

internal threshold, PWM output is disabled and this activates over-current

protection. This pin also provides current amplitude information for Current

Mode control.

5

VDD

Power Supply Power supply

6

GATE

Driver Output The totem-pole output driver for driving the power MOSFET

ABx:

ABU: FAN6863WTY

ABV: FAN6863WRTY

ABW: FAN6863WLTY

TT:

Wafer Lot Code

_ _ _

:

Week Code