FAN6861 Datasheet, PDF (2/15 Pages) Fairchild Semiconductor – Low-Cost, Highly Integrated, Green-Mode PWM Controller for Peak Power Management

Typical Application
Figure 1. Typical Application
Block Diagram
VDD 5
OVP ^OLP
OCP
Auto
Recovery
Protection
25V
OVP _Latch-off
OTP Protection
Latch-Off release
4V
Internal
BIAS
OSC
Green
Mode
Controller
UVLO
FB
GND
1
S
Q
R
17.5V/9.5V
OCP
OCP
Delay
SENSE
0.5V
Soft
Driver
VDD
Vlimit ramp
(Include Soft-Start)
Slope
Compensation
3R
Blanking
Circuit
5.2V
R
6 GATE
4 _SENSE
2 FB
I_RT
RT ³
1V
0.7V
OTP1
Debounce
OTP2
Debounce
OTP
OLP
OLP
Delay
4.6V
Figure 2. Block Diagram
© 2009 Fairchild Semiconductor Corporation
FAN6861 • Rev. 1.0.1
2
www.fairchildsemi.com