FAN7621B Fairchild Semiconductor, FAN7621B Datasheet - Page 14

• Manufacturer Part Number: FAN7621B
• Description: The FAN7621B is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN7621B • Rev. 1.0.1
Typical Application Circuit (Half-Bridge LLC Resonant Converter)
Features
Vin=340~400Vdc
Application
High efficiency ( >94% at 400V
Reduced EMI noise through zero-voltage-switching (ZVS)
Enhanced system reliability with various protection functions
LCD TV
3.15A/250V
F101
220uF/ 450V
C101
R109
R110
R111
1M
1M
45k
Vcc=16~ 20Vdc
FAN7621B
Device
U2
R104
5.1k
R108
10k
R105
7.5k
DC
R103 400k
C108
12nF
C107
10uF
input)
R107
7.7k
R112
ZD101
R102
6.8V
U5
10k
U4
Input Voltage Range
1k
Figure 29. Typical Application Circuit
680pF
C111
C104
open
(340~400V
R101
0.2
100pF
C103
0.33uF
C105
CON
390V
RT
CS
JP5
0
LVcc
SG
DC
HVcc
CTR
HO
LO
PG
DC
14
)
1N4148
1N4148
D102
R113
D102
R114
3.3
3.3
1N4937
D101
R115
R116
10k
10k
FCPF11N60F
FCPF11N60F
Q1
Rated Output Power
Q2
C110
open
C102
22nF
C106
150nF
JP1, 0
JP2, 0
JP3, 0
JP4, 0
192W
EER3542
C301
FYPF2010DN
FYPF2010DN
D202
D201
R202
1k
(Rated Current)
Output Voltage
C203
2000uF /
47nF
C201
R201
24V-8A
35V
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10k
U2
R203
33k
2000uF/
C202
35V
R204
62k
R205
7k
Vo
C204
12nF
R205
2k