FAN6863W Fairchild Semiconductor, FAN6863W Datasheet - Page 3

• Manufacturer Part Number: FAN6863W
• Description: A highly integrated PWM controller, FAN6863 provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN6863W • Rev. 1.0.0
Marking Information
Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
SENSE Current Sense
Name
GATE
GND
VDD
FB
RT
Power Supply Power supply
Driver Output The totem-pole output driver for driving the power MOSFET
Temperature
Function
Feedback
Detection
Ground
Ground
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
cycle. This pin also provides over-current protection. IF V
trigger level and persists at that level, the controller stops and restarts.
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.
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.
Figure 4. Pin Configuration
Figure 3. Top Mark
3
ABx:
TT:

_ _ _
Description
:
:
ABU: FAN6863WTY
ABV: FAN6863WRTY
ABW: FAN6863WLTY
Wafer Lot Code
Year Code
Week Code
FB
is higher than the
www.fairchildsemi.com