FAN6206 Fairchild Semiconductor, FAN6206 Datasheet

no-image

FAN6206

Manufacturer Part Number
FAN6206
Description
The highly integrated FAN6206 is a dual-channel synchronous rectification (SR) controller
Manufacturer
Fairchild Semiconductor
Datasheet
© 2010 Fairchild Semiconductor Corporation
FAN6206 • Rev. 1.0.2
FAN6206
Highly Integrated Dual-Channel Synchronous
Rectification Controller for Dual-Forward Converter
Features
Applications
Ordering Information
Part Number
FAN6206MY
Highly Integrated Dual-Channel SR Controller
Receives Synchronized Driving Signal from the
Primary Side
Internal Linear-Predict Timing Control for DCM
Operation
Ultra-Low V
Output Voltage of PC Power
V
14V Gate Driver Clamp
PC Power
Server Power
Open-Frame SMPS
DD
Over-Voltage Protection
DD
Operating Voltage for Different
Temperature Range
-40°C to +105°C
Operating
8-Pin Small Outline Package (SOP)
Description
The highly integrated FAN6206 is a dual-channel
synchronous rectification (SR) controller. FAN6206
allows design of a cost-effective power supply with
fewer external components, especially suited for dual-
forward topology used to obtain higher efficiency for
ATX power supplies.
The primary-side control method provides synchronous
rectification control for dual-forward converters that
operate
FAN6206 includes a proprietary linear-predict timing
control mechanism for dual-forward converters that
operate in discontinuous conduction mode (DCM) at
fixed or variable frequency. PWM frequency tracking
with secondary-side winding detection is provided by
adding dividing resistors. The primary-side signals are
generated from Fairchild’s FAN6210 (Primary-Side
Synchronous Rectifier Signal Trigger for Dual-Forward
Converter). The primary-side signals are transferred
through a pulse transformer to the secondary-side. The
benefits of this technique include simple control method
and improved power system reliability.
FAN6206 is available in 8-pin SOP package.
in
Package
continuous
conduction
mode
Tape & Reel
April 2010
www.fairchildsemi.com
Packing
Method
(CCM).

Related parts for FAN6206

FAN6206 Summary of contents

Page 1

... Synchronous Rectifier Signal Trigger for Dual-Forward Converter). The primary-side signals are transferred through a pulse transformer to the secondary-side. The benefits of this technique include simple control method and improved power system reliability. FAN6206 is available in 8-pin SOP package. Operating 8-Pin Small Outline Package (SOP) April 2010 in ...

Page 2

... Application Diagram Internal Block Diagram © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Figure 1. Typical Application Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...

Page 3

... Driver output for freewheeling synchronous rectifier MOSFET. 7 GND Ground 8 GATE1 Driver output for rectifying synchronous rectifier MOSFET. © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 F: Fairchild Logo Z: Plant Code X: Year Code Y: Week Code TT: Package Type T: M=SOP P: Y: Green Package M: Manufacture Flow Code Figure 3 ...

Page 4

... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Ambient Temperature A © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Parameter < 50°C A Parameter 4 Min. Max. ...

Page 5

... Propagation Delay to OUT HIGH t PD-HIGH-SP2 t PD-LOW-SN1 Propagation Delay to OUT LOW t PD-LOW-SN2 t PD-LOW-LPC1 Propagation Delay to OUT LOW t PD-LOW-LPC2 t ON-MAX1 Maximum On Time t ON-MAX2 © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Conditions V =15V, DET=50KHz 7.5V DD OVP 1 DD OVP 20V 20V DD V =12V, I ...

Page 6

... Threshold Voltage for Disable V LPC-LOW2 LPC Function Debounce Time for Disable LPC t LPC-LOW1 Function Debounce Time for Disable LPC t LPC-LOW2 Function © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Conditions Min. Sweep V from LOW N- HIGH 3 Sweep V from LOW P- HIGH ...

Page 7

... Figure 9. Operating Current 420 400 380 360 340 320 300 280 -40 -25 - Temperature℃ Figure 11. Propagation Delay to OUT HIGH 1 (Trigger by SP) © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 = 25°C. A 8.5 8.4 8.3 8.2 8.1 8 110 125 Figure 6. Turn-On Threshold Voltage 2 7.7 7.6 7.5 7.4 7.3 65 ...

Page 8

... Figure 17. Maximum On Time 1 5.0 4.5 4.0 3.5 3.0 -40 -25 - Temperature℃ Figure 19. Threshold Voltage Turn Off SR MOS 1 © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 = 25°C. A 350 300 250 200 150 110 125 Figure 14.Propagation Delay to OUT LOW 2 180 160 140 ...

Page 9

... Temperature℃ Figure 25. Lower Clamp Voltage 1 300 275 250 225 200 -40 -25 - Temperature℃ Figure 27. Maximum Source Current 1 © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 = 25°C. A 5.0 4.5 4.0 3.5 3 110 125 Figure 22.Threshold Voltage of V 2.2 2.1 2.0 1.9 1 ...

Page 10

... Figure 33 shows the timing diagram for discontinuous conduction mode (DCM). The switching operation of SR MOSFETs Q determined by the SN and SP signals. FAN6206 turns on SR MOSFETs at the rising edge of the SP signal, while it turns off the SR MOSFETs at the rising edge of the SN signal. Within one switching cycle, SP and SN are obtained two times ...

Page 11

... Figure 32. SR Gate is Driven by SP & SN Signal in CCM Mode Figure 33. Freewheeling SR Turned Off by LPC Mechanism in DCM Mode © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 11 www.fairchildsemi.com ...

Page 12

... off earlier. Figure 34. Turn-Off Timing of Freewheeling SR © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Under-Voltage Lockout (UVLO) The power-on and off thresholds are fixed at 8.5V and voltage is applied to 7.5V. The VDD pin is connected to a 12V output voltage IN terminal. VDD Pin Over-Voltage Protection The over-voltage conditions are usually caused by open feedback loops ...

Page 13

... Typical Application Circuit (Dual-Forward Converter with SR) Application Fairchild Devices FAN4801 PC Power FAN6210 FAN6206 © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 Input Voltage Range 90~264V AC Figure 35. Application Circuit 13 Output 12V/25A www.fairchildsemi.com ...

Page 14

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2010 Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0 1.75 4 ...

Page 15

... Fairchild Semiconductor Corporation FAN6206 • Rev. 1.0.2 15 www.fairchildsemi.com ...

Related keywords