FAN6862H Fairchild Semiconductor, FAN6862H Datasheet - Page 3

• Manufacturer Part Number: FAN6862H
• Description: A highly integrated PWM controller, FAN6862H(HR) provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2010 Fairchild Semiconductor Corporation
FAN6862H(HR) • Rev. 1.0.0
Marking Information
Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
SENSE
Name
GATE
GND
VDD
RT
FB
Power Supply Power supply
Driver Output The totem-pole output driver for driving the power MOSFET.
ABxTT
Temperature
Function
Feedback
Detection
Ground
Current
Sense
• • • •
- - -
Description
Ground
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 cycle. This pin also provides OCP: once V
level and lasts for a long time, the controller stops and restarts.
For over-temperature protection, an external NTC thermistor is connected from
this pin to the GND pin. The impedance of the NTC thermistor 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
internal threshold, PWM output is disabled. This activates over-current
protection. This pin also provides current amplitude information for current-
mode control.
Figure 4. Pin Assignments
Figure 3. Top Mark
3
ABx:
TT:
_ _ _
:
:
ABO: FAN6862HTY
ABP: FAN6862HRTY
Wafer Lot Code
Year Code
Week Code
FB
is larger than the trigger
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