FAN3121T Fairchild Semiconductor, FAN3121T Datasheet - Page 17

• Manufacturer Part Number: FAN3121T
• Description: The FAN3121 and FAN3122 MOSFET drivers are designed to drive N-channel enhancement MOSFETs in low-side switching applications by providing high peak current pulses
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN3121 / FAN3122 • Rev. 1.0.0
Typical Application Diagrams
V
IN
B2
B1
V
PWM
IN
A1
A2
Figure 54. Hybrid Synchronous Rectification in a Forward Converter
From A2
From A1
Active HIGH
SR Enable
Figure 53. Full-Bridge Synchronous Rectification
AGND
V
SR EN
EN
FAN3121
DD
IN
1
2
3
4
V
IN
EN
DD
(AGND)
AGND
17
P1
1
2
3
4
FAN3122
V
BIAS
8
6
7
5
V
OUT
OUT
PGND
DD
PGND
6
5
8
7
OUT
OUT
V
DD
SR EN
V
EN
IN
DD
AGND
1
2
3
4
FAN3122
V
OUT
6
5
8
7
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V
OUT
OUT
PGND
DD
V
OUT
BIAS