SG6520A Fairchild Semiconductor, SG6520A Datasheet

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SG6520A

Manufacturer Part Number
SG6520A
Description
The SG6520A is designed to provide the supply voltage, current supervisor, remote on/off (PSON), power-good (PGO) indicator, and fault protection (FPO) functions for switching power systems
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2008 Fairchild Semiconductor Corporation
SG6520A • Rev. 1.0.3
SG6520A
PC Power Supply Supervisors
Features
Applications
Ordering Information
SG6520ADY
Part Number
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Two 12V Sense Input Pins: VS12 and VS12B
Over-Voltage Protection (OVP) for 3.3V, 5V, and
Two 12V
Over-Current Protection (OCP) for 3.3V, 5V, and
Two 12V
Under-Voltage Protection (UVP) for 3.3V, 5V, and
Two 12V
Open-Drain Output for PGO and FPO Pins
300ms Power-Good Delay
2.8ms PSON Control to FPO Turn-off Delay
48ms PSON Control Delay
No Lock-up During the Fast AC Power On/Off
Wide Supply Voltage Range: 4V to 15V
Over-Temperature Protection (OTP)
Switch-Mode Power Supplies with Active PFC
Servo System Power Supplies
PC-ATX Power Supplies
Temperature Range
-40°C to +85°C
Operating
Eco Status
Green
Description
The SG6520A is designed to provide the supply
voltage, current supervisor, remote on/off (PSON),
power good (PGO) indicator, and fault protection (FPO)
functions for switching power systems.
For supervisory functions, it provides the over-voltage
protection (OVP) for 3.3V, 5V, and two 12V; over-
current protection (OCP) for 3.3V, 5V, and two 12V;
under-voltage protection (UVP) for 3.3V, 5V, and two
12V. When 3.3V, 5V, or 12V voltage decreases to 2.3V,
3.5V, and 9V, respectively, the under-voltage protection
function is enabled. FPO is set HIGH to turn off the
PWM controller IC. The voltage difference across the
external current shunt is used for OCP functions. An
external resistor can be used to adjust protection
threshold. An additional protection input pin provides
the flexibility for designing protection circuits.
The power supply is turned on after a 48ms delay when
PSON signal is set from HIGH to LOW. To turn off the
power supply, the PSON signal is set from LOW to
HIGH with a delay of 48ms. The PGI circuitry provides a
power-down warning signal for PGO. When PGI input is
lower than the internal 1.25V reference voltage, the
PGO signal is pulled LOW.
16-pin Dual In-Line Package (DIP)
Package
August 2008
www.fairchildsemi.com
Packing
Method
Tube

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SG6520A Summary of contents

Page 1

... For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Description The SG6520A is designed to provide the supply voltage, current supervisor, remote on/off (PSON), power good (PGO) indicator, and fault protection (FPO) functions for switching power systems. ...

Page 2

... Application Diagram © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Figure 1. Typical Application 2 www.fairchildsemi.com ...

Page 3

... Block Diagram © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Figure 2. Function Block Diagram 3 www.fairchildsemi.com ...

Page 4

... Marking Information Pin Configuration © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 F – Fairchild logo Z – Plant code X – 1 digit year code Y – 1 digit week code TT – 2 digits die run code T – Package type (D:DIP) P – Z:Pb free, Y:Green package M – Manufacture flow code Figure 3 ...

Page 5

... Supply voltage: 4.2V ~ 15V. For ATX SMPS connected to 5V-standby and 12V through 15 VDD diodes, respectively. Power-good logic output (open-drain). Power good=1 means that the power supply is 16 PGO good for operation. The power good delay is 300ms. © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 = 1.25/R , for OCP programming. REF I www.fairchildsemi.com ...

Page 6

... 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 Parameter T Operating Ambient Temperature A © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Parameter Min. -40 6 Min. Max. Unit ...

Page 7

... IL t Timing PSON to On/Off PSON t Timing PGO LOW to FPO HIGH PSOFF Over-Temperature Section V Over-Temperature Threshold TH V Hysteresis HYST © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Conditions Min. 4.2 PSON = LOW PSON = HIGH 1 VS33 3.830 VS5 5.80 VS12, VS12B 13. 18.5kΩ ~ 75kΩ ...

Page 8

... Functional Description The SG6520A provides over-current protection for the 3.3V, 5V, and two 12V rails. Whenever an OCP condition occurs at any of the voltage rails, PGO is LOW and FPO is open. The internal OCP comparators have a very small offset voltage ( ± 3mV). The sink currents of IS33, IS5, and IS12 are eight times the current at the RI pin ...

Page 9

... Timing Chart © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 Figure 6. Timing Diagram 9 www.fairchildsemi.com ...

Page 10

... Temperature (℃) Figure 7. V 6.00 4.00 2.00 0.00 -2.00 -4.00 -6.00 -40 -25 - Temperature (℃) Figure 9. V OFFSET 1.30 1.28 1.26 1.24 1.22 1.20 -40 -25 - Temperature (℃) Figure 11. V © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 2.10 2.00 1.90 1.80 1.70 1.60 1.50 1. 110 125 vs. T PGI A 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0 110 125 vs ...

Page 11

... 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/. © 2008 Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 A 19.68 18. ...

Page 12

... Fairchild Semiconductor Corporation SG6520A • Rev. 1.0.3 12 www.fairchildsemi.com ...

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