FAN501A Datasheet, PDF (3/16 Pages) Fairchild Semiconductor – Offline DCM / CCM Flyback PWM Controller for Charger Applications

Marking Information
ZXYTT
FAN501A
TM
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
T: Package Type (MP=MLP)
M: Manufacture Flow Code
Pin Configuration
Figure 4. Top Mark
HV
SD
8
7
6 FB
CS 9 FAN501A 5 SGND
PGND 10
4 COMP
1
2
3
GATE VDD VS
Figure 5. Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
9
10
Name
GATE
VDD
VS
COMP
SGND
FB
SD
HV
CS
PGND
Description
PWM Signal Output. This pin has an internal totem-pole output driver to drive the power
MOSFET. The gate driving voltage is internally clamped at 7.5 V.
Power Supply. IC operating current and MOSFET driving current are supplied through this pin.
This pin is typically connected to an external capacitor.
Voltage Sense. This pin detects the output voltage information and diode current discharge time
based on the voltage of the auxiliary winding. It also senses sink current through the auxiliary
winding to detect input voltage information.
CC Control Correction. This pin connects to external resistor to program the CC control
correction weighting.
Signal Ground
Feedback. An opto-coupler is typically connected to this pin to provide feedback information to
the internal PWM comparator. This feedback is used to control the duty cycle in Constant-
Voltage (CV) regulation.
Shut Down. This pin is implemented for external over-temperature protection by connecting to
an NTC thermistor.
High Voltage. This pin connects to a DC bus for high-voltage startup.
Current Sense. This pin connects to 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.
Power Ground
© 2014 Fairchild Semiconductor Corporation
FAN501A • Rev. 1.0.0
3
www.fairchildsemi.com