FAN3121 Datasheet, PDF (17/21 Pages) Fairchild Semiconductor – Single 9A High-Speed, Low-Side Gate Driver

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