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MFG:FSC  Package Cooled:SOP  D/C:00+  

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Part Number: FAN7687

 

MFG: FSC

Package Cooled: SOP

D/C: 00+

Description: The FAN7685/FAN7686/FAN7687 is a complete output supervisory circuitry intended for use in the secondary side of the...


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FAN7687 General Description


The FAN7685/FAN7686/FAN7687 is a complete output supervisory circuitry intended for use in the secondary side of the switched mode power supply. It provides overvoltage protection (OVP), undervoltage protection(UVP), overcur-rent protection (OCP), and power good signal generator to monitor and control the outputs of the switching power sup-ply system. Remote on/off(PSON</a>) control and some preci-sion protection features are also implemented.

It directly senses all the output rails for OVP, UVP, and OCP without external divider resistors. As for output control, power good output(PGO) and fault protection output(FPO</a>) are included. The FAN7685/FAN7686/FAN7687 offers a simple and cost effective solution with minimum number of external components and greatly reduces PCB board space for power supply.

FAN7687 Maximum Ratings

Parameter Symbol Value Unit
Supply Voltage VCC, VCC12 16 V
Input Voltage VPSON</a>, VS5, VS33, VPGI,IS5, IS33 8 V
VS12, IS12, ISVCC12 16
Output Voltage VPGO 8 V
VFPO</a> 16
Operating Temperature Topr -40 ~ 125 °C
Storage Temperature Tstg -55 ~ 150 °C
Power Dissipation PD 1 W

FAN7687 Features

PC Power Supply Outputs Supervisory Circuitry
Few External Components
Over Voltage Protection for 3.3V, 5V and 12V Outputs
Under Voltage Protection for 3.3V, 5V and 12V Outputs
Over Current Protection for 3.3V, 5V and 12V Outputs
Dual Over Current Portection for 12V Outputs(FAN7687)
Fault Protection Output With Open Drain Output
Open Drain Power Good Output
300ms Power Good Delay
38ms PSON</a> On/Off Delay
73us Debounce
2.3ms PSON</a> to FPO</a> Turn Off Delay
Latch Function Controlled by PSON</a>

FAN7687 Typical Application

-PC Switching Mode Power Supply

FAN7687 Connection Diagram

FAN7687  Connection Diagram

FAN7687 datasheet

FAN7687
PDF/DataSheet Download

  • Datasheet: FAN7687
  • File Size: 329376 KB
  • Manufacturer: FAIRCHILD [Fairchild Semiconductor]
  • Click here to Download

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