FAN6210 Fairchild Semiconductor, FAN6210 Datasheet - Page 8

• Manufacturer Part Number: FAN6210
• Description: FAN6210 is a primary-side trigger Integrated Circuit (IC) specially designed for the synchronous rectifier (SR) in dual forward converters employing FSR660/630
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN6210 Rev. 1.0.2
Figure 17. Programmable Delay with Resistor
SOUT
SOUT
SIN
SIN
XP
XP
XN
DET
XN
DET
300ns
300ns
50ns
300ns
50ns
300ns
700ns
700ns
Programmable delay
Programmable delay
Gate drive for Powering SR
Gate drive for Powering SR
50ns
50ns
Figure 16. Timing Diagram
300ns
300ns
100ns
100ns
50ns
Heavy load condition
700ns
Light load condition
50ns
8
700ns
Under-Voltage Lockout (UVLO)
The power-on and -off threshold of FAN6210 are fixed
at 10V and 8V, respectively. The VDD pin can be
connected with the power source of the PWM controller.
V
V
abnormal conditions. Once the V
V
for t
Green-Mode Operation
To improve light-load efficiency, green-mode operation
is employed, which disables the SR turn-on trigger
signal, minimizing gate drive power consumption at
light-load condition. Green mode is enabled when the
duty cycle of SIN is smaller than 10%.
Gate drive for Free-wheeling SR
Gate drive for Free-wheeling SR
DD
DD
DD
OVP
Pin Over-Voltage Protection
over-voltage protection voltage (V
over-voltage protection prevents damage due to
, FAN6210 stops
Programmable delay
Programmable delay
operation.
DD
300ns
300ns
50ns
300ns
50ns
300ns
voltage exceeds the
DD-OVP
www.fairchildsemi.com
) and lasts