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Pin Configuration
CS
OUT
VCC
RT
HV
NV
GND
ADIM
Figure 3. Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
CS
OUT
VCC
RT
ADIM
GND
NC
HV
Description
Current Sense . Limits output current depending on the sensing resistor voltage. The CS pin is
also used to set the LED current regulation
OUT . Connects to the MOSFET gate.
VCC . Supply pin for stable IC operation ZCD signal detection used for accurate PFC function.
RT . Programmable operating frequency using external resistor and the IC has pre-fixed
frequency when this pin is open or floating.
Analog Dimming . Connect to the internal current source and can change the output current
using an external resistor. If ADIM is not used, it is recommended to connect a 0.1 μF bypass
capacitor between the ADIM and GND.
GROUND . Ground for the IC.
No Connection
High Voltage . Connect to the high voltage line and supply current to the IC
? 2011 Fairchild Semiconductor Corporation
FL7701 ? Rev. 1.0.4
3
www.fairchildsemi.com
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