FAN302UL Fairchild Semiconductor, FAN302UL Datasheet - Page 3
Manufacturer Part Number
This highly integrated PWM controller provides several features to enhance the performance of flyback converters
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.2
Current Sense. This pin connects a current-sense resistor to detect the MOSFET current for
Peak-Current-Mode control for output regulation. The current-sense information is also used to
estimate the output current for CC regulation.
PWM Signal Output. This pin has an internal totem-pole output driver to drive the power
MOSFET. It is internally clamped at 15V.
Power Supply. IC operating current and MOSFET driving current are supplied through this pin.
This pin is typically connected to an external V
Voltage Sense. This pin detects the output voltage information and diode current discharge
time based on voltage of the auxiliary winding.
Feedback. Typically, an Opto-Coupler is connected to this pin to provide feedback information
to the internal PWM comparator. This feedback is used to control the duty cycle in CV
High Voltage. This pin connects to the DC bus for high-voltage startup.
Figure 5. Pin Assignments
Figure 4.Top Mark
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
P: Y= Green Package
M: Manufacture Flow Code