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Fairchild Semiconductor Electronic Components Datasheet

FAN6210 Datasheet

Primary-Side Synchronous Rectifier (SR) Trigger Controller

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September 2009
FAN6210
Primary-Side Synchronous Rectifier (SR) Trigger Controller
for Dual Forward Converter
Features
ƒ Primary-Side Trigger Controller for Dual Forward
Converters with Synchronous Rectifier (SR)
ƒ Specialized SR Controller for Dual Forward
Converter
ƒ Programmable Turn-on Delay Time for the
Powering SR (RDLY Pin)
ƒ Winding Voltage Detection for Precision Control at
Light-Load Condition (DET Pin)
ƒ Green-Mode Operation to Improve Light-Load
Efficiency
ƒ Differential Mode Control Signal with Better Noise
Immunity
ƒ VDD Over-Voltage Protection (OVP)
Applications
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ƒ Personal Computer (PC) Power Supply
ƒ Entry-Level Server Power Supply
Description
FAN6210 is a primary-side trigger Integrated Circuit (IC)
specially designed for the synchronous rectifier (SR) in
dual forward converters employing FSR660/630.
FAN6210 provides drive signal for the primary-side
power switches by using an output signal from PWM
controller. FAN6210 can be combined with any PWM
controller that can drive a dual-forward converter. To
obtain optimal timing for the SR drive signals,
transformer winding voltage is also monitored. 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.
FAN6210 is available in 8-pin SOP package.
Ordering Information
Part Number
Operating
Temperature Range
FAN6210MY
-40°C to +105°C
Eco Status
Green
Package
8-Pin Small Outline
Package (SOP)
Packing Method
Tape & Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2009 Fairchild Semiconductor Corporation
FAN6210 Rev. 1.0.1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN6210 Datasheet

Primary-Side Synchronous Rectifier (SR) Trigger Controller

No Preview Available !

Application Diagram
Figure 1. Typical Application
Internal Block Diagram
Rising/Falling Delay
SIN 3
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RDLY 4
Green
Mode
(D<10%)
GM
300ns
100ns
Controlled Rising Delay
DET 5
2/3V
+
-
+
-
25.5V
OVP
Rising Delay
50ns
Rising/Falling Delay
VDD 6
+
-
10/8V
50ns
50ns
Internal Bias
7 SOUT
8 GND
GM One-shot Vibrator
700ns
1 XP
One-shot Vibrator
300ns
One-shot Vibrator
300ns
2 XN
Figure 2. Functional Block Diagram
© 2009 Fairchild Semiconductor Corporation
FAN6210 Rev. 1.0.1
2
www.fairchildsemi.com


Part Number FAN6210
Description Primary-Side Synchronous Rectifier (SR) Trigger Controller
Maker Fairchild Semiconductor
Total Page 11 Pages
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