FAN302UL Datasheet, PDF (3/19 Pages) Fairchild Semiconductor – PWM Controller for Low Standby Power Battery-Charger Applications

Marking Information
Pin Configuration
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
T: M=SOP
P: Y= Green Package
M: Manufacture Flow Code
Figure 4.Top Mark
Figure 5. Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
CS
GATE
VDD
VS
GND
FB
NC
HV
Description
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_DD capacitor.
Voltage Sense. This pin detects the output voltage information and diode current discharge
time based on voltage of the auxiliary winding.
Ground
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
regulation.
No Connect
High Voltage. This pin connects to the DC bus for high-voltage startup.
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.3
3
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