FAN6103 Fairchild Semiconductor, FAN6103 Datasheet

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FAN6103

Manufacturer Part Number
FAN6103
Description
FAN6103 controller is designed for switching mode power supply for desktop PCs
Manufacturer
Fairchild Semiconductor
Datasheet
© 2009 Fairchild Semiconductor Corporation
FAN6103 • Rev. 1.0.0
FAN6103
Power Supply Supervisor Plus PWM
Features
Applications
Ordering Information
FAN6103NZ
Part Number
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
PC Half-Bridge Power Supply Supervisor Plus
PWM
High Integration, Few External Components
Over-Voltage Protection for 3.3V, 5V, and 12V
Under-Voltage Protection for 3.3V, 5V, and 12V
Under-Voltage protection for –12V and/or –5V
Over-Power and Short-Circuit Protection
Power-Down Warning Circuitry
Power-Good Circuitry
Delay Time for PSON and PG Signal
Remote ON/OFF Function
On-Chip Oscillator and Error Amplifier
Latching PWM for Cycle-By-Cycle Switching
Push-Pull PWM Operation and Totem-Pole Outputs
Soft-Start and Maximum 93% Duty Cycle
Desktop PC Power Supply
Temperature Range
-40°C to +105°C
Operating
Eco Status
RoHS
Description
FAN6103 controller is designed for switching mode
power supply for desktop PCs. It provides all the
functions necessary to monitor and control the output of
the power supply. Remote ON/OFF control, power good
circuitry, and protection features against over-voltage
and over-power are implemented. It directly senses all
the output rails for OVP without the need of external
dividers. An innovated AC-signal sampling circuitry
provides a sufficient power-down warning signal for PG.
A built-in timer generates accuracy timing for control
circuit, including the PS-off delay. The cycle-by-cycle
PWM switching prevents the power transformer from
saturation and ensures the fastest response for the
short-circuit protection, which greatly reduces the stress
for power transistors.
Utilizing minimum external components, the FAN6103
includes all of the functions for push-pull and/or half-
bridge topology, decreasing the production cost and
PCB space, while increasing the mean time between
failures for power supply
16-Pin Dual Inline Package (DIP)
Package
October 2009
www.fairchildsemi.com
Packing
Method
Tube

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FAN6103 Summary of contents

Page 1

... For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 Description FAN6103 controller is designed for switching mode power supply for desktop PCs. It provides all the functions necessary to monitor and control the output of the power supply. Remote ON/OFF control, power good circuitry, and protection features against over-voltage and over-power are implemented ...

Page 2

... Application Diagram tro lle r V © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0 Figure 1. Typical Application ...

Page 3

... ffe r 2. ffe 1.4V On/Off D elay Marking Information © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0 2µA 0. ...

Page 4

... The soft-start settable through an external capacitor. The current source output at this pin 8µA and the voltage is clamped at 2.5V Reference Resistor. Connected to external resistor for the reference setting. 16 VCC Supply voltage; 4.5V ~ 5.5V, connected to 5V standby. © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 Figure 4. Pin Configuration 4 www.fairchildsemi.com ...

Page 5

... Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Ambient Temperature A © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 Parameter < 50°C A Human Body Model, JESD22-A114 Charged Device Model, ...

Page 6

... Protection PWM Output Section Output Voltage Low Output Voltage High OH R Output Impedance Note (2/3) • (1/3) • V OPPS OPP © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 Conditions PSON = LOW, OP1/OP2 = 1000pF PSON = HIGH, OP1/OP2 = 1000pF 3.3V 5.0V 12.0V 3.3V 5.0V 120V 3.3V 5.0V 12. 1.5V (3) UVAC OH ...

Page 7

... PSRR Power Supply Rejection Ratio Oscillator Section PWM Frequency f OSC DC Max Duty Cycle MAX Soft-Start Section Charge Current I SS © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 (Continued) Conditions R = 75kΩ 100pF, Pull L 2.25V to 5.00V C = 100pF, Pull to L 5.00V to 2.25V ...

Page 8

... Temperature (°C) Figure 7. PWM Output Voltage vs. Temperature 90.0 89.5 89.0 88.5 88.0 -40 -25 - Temperature (°C) Figure 9. Maximum Duty Cycle vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 2.60 2.55 2.50 2.45 2. 110 125 -40 Figure 6. Reference Voltage vs. Temperature 66.0 65.0 64.0 63.0 62.0 61 110 125 -40 Figure 8. Frequency vs. Temperature 7 ...

Page 9

... Temperature (°C) Figure 11. 3.3V V UVP 3.63 3.61 3.59 3.57 3.55 3.53 -40 -25 - Temperature (°C) Figure 13 vs. Temperature UVP 7.20 7.15 7.10 7.05 7.00 6.95 -40 -25 - Temperature (°C) Figure 15. 12V V UVP © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 (Continued) 4.20 4.15 4.10 4.05 4. 110 125 vs. Temperature 6.25 6.20 6.15 6.10 6.05 6. 110 125 14.65 14.60 14.55 14.50 14.45 14. ...

Page 10

... PWM section comprises a built-in 65KHz oscillator and high-immunity circuits, which protect the system from noise interference and provide more noise margins. FAN6103 has OVP and UVP for 12V, 5V, and 3.3V. NVP is used for negative voltage protection, such as - 12V and/or -5V. The UVAC is applied to detect AC line condition ...

Page 11

... Timing Chart VCC PSON 3.3V,5V,12V t PSON(ON) NVP SS(on/off VCC PSON UVAC OPP SS(on/off) PG © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 t PSON(OFF) t PSOFF Voltage < V UVAC Figure 20. Timing Diagram 11 t UVP t NVP t OPP www.fairchildsemi.com ...

Page 12

... 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/. © 2009 Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 A 19.68 18.66 9 ...

Page 13

... Fairchild Semiconductor Corporation FAN6103 • Rev. 1.0.0 13 www.fairchildsemi.com ...

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