Application Diagram
BD
L1
D1
LED
Fuse
L3
C1
C2
CS
HV
D2
OUT
VCC
RT
NV
GND
ADIM
R2
Q1
C3
R1
U1
C4
R3
L2
Figure 1. Typical Application
Block Diagram
VCC 3
VCC
JFET
8
HV
ZCD
UVLO
time
I AD
ZCD
ADIM
5
DAC
Soft start
Digital Block
TSD
RT
4
Oscillator
S
Q
2 OUT
-
Reference
+
R
GND 6
LEB
Leading Edge
Blanking
-
+
AOCP
1
CS
2.5V
Figure 2. Block Diagram
? 2011 Fairchild Semiconductor Corporation
FL7701 ? Rev. 1.0.4
2
www.fairchildsemi.com
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