FAN7687AN
FAN7687AN Datasheet
FAN7685/FAN7686/FAN7687
| Part | Datasheet |
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FAN7687AN |
FAN7687AN (pdf) |
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| FAN7685/FAN7686/FAN7687 PC Power Supply Output Monitoring IC • 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 On/Off Delay • 73us Debounce • 2.3ms PSON to FPO Turn Off Delay • Latch Function Controlled by PSON • PC Switching Mode Power Supply 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 , overcurrent protection OCP , and power good signal generator to monitor and control the outputs of the switching power supply system. Remote on/off PSON control and some precision 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 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. 14DIP 14SOP 2004 Fairchild Semiconductor Corporation FAN7685/FAN7686/FAN7687 Internal Block Diagrams Vcc 13 VS12 10 VS5 12 VS33 11 IS33 9 Start-up Vref REF. 3.6V Vref Oscillator Reset UVP L Delay 75ms L PGI_O OVP L PSON clr Delay 2.3ms R L Debounce L 73us L R S QL L PWR PSON L Debounce L 38ms R CLK 3.6V H FPO 3 FPO 3.6V 150uA L 4 PSON 14 PGO 2 GND IS5 8 IS12 5 8*Iref Ordering Information Product Number FAN7685N FAN7686N FAN7687N FAN7687AN FAN7685M FAN7686M FAN7687M FAN7687AM FAN7685MX FAN7686MX FAN7687MX FAN7687AMX Package 14DIP 14SOP Operating Temperature -40 ~ 125°C -40 ~ 125°C -40 ~ 125°C Packing Tube Tape & Reel DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 3/9/04 0.0m 001 2004 Fairchild Semiconductor Corporation |
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