FAN6863RTY Datasheet, PDF (3/16 Pages) Fairchild Semiconductor – Highly Integrated Green-Mode PWM Controller

Marking Information
Pin Configuration
ABx:
TT:
:
_ _ _:
ABR: FAN6863TY
ABF: FAN6863RTY
ABG: FAN6863LTY
Wafer Lot Code
Year Code
Week Code
Figure 3. Top Mark
Figure 4. Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
Name Function
Description
GND
Ground Ground.
The FB pin provides the output voltage regulation signal. It provides feedback to
FB
Feedback
the internal PWM comparator, so the PWM comparator can control the duty
cycle. This pin also provides over-current protection. Once V_FB is large than
trigger level and last for a long time, the controller stops and restarts.
RT
Temperature
Detection
An external NTC thermistor is connected from this pin to GND pin. The
impedance of the NTC decreases at high temperatures. Once the voltage of the
RT pin drops below a threshold, PWM output is disabled.
This pin senses the voltage across a resistor. When the voltage reaches the
SENSE
Current Sense
internal threshold, PWM output is disabled and this activates over-current
protection. This pin also provides current amplitude information for Current-
Mode control.
VDD Power Supply Power supply.
GATE Driver Output The totem-pole output driver for driving the power MOSFET.
© 2011 Fairchild Semiconductor Corporation
FAN6863 • Rev. 1.0.1
3
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