Datenblatt-Suchmaschine für elektronische Bauteile |
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SS6580L Datenblatt(PDF) 6 Page - Silicon Standard Corp. |
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SS6580L Datenblatt(HTML) 6 Page - Silicon Standard Corp. |
6 / 8 page www.SiliconStandard.com 6 of 8 SS6580/L n BLOCK DIAGRAM - + - + SD Oscillator PWM Comparator Error AMP COMP FB REF VCC PHASE OCSET UGATE GND 200 µA Over Current Built-In Soft Start Gate Control Power-On Reset - + n PIN DESCRIPTIONS PIN 1: OCSET - Current limit sense pin. Connect a resistor ROCSET from this pin to the drain of the external MOSFET. ROCSET, an internal 200µA current source (IOCSET), and the external MOSFET on-resistance (RDS(ON)) jointly set the over-current trip point according to the following equation: I I R R PEAK OCSET OCSET DS(ON = × ) If the FB pin voltage is sensed to be below 50% of the internal voltage reference VDAC, the over-current comparator cycles the soft-start function. PIN 2: SD - Shutdown pin. Connect this pin to ground for shutdown. PIN 3:COMP - External compensation pin. This pin is connected to the error amplifier output and PWM comparator. An RC network is connected to the FB pin to compensate the voltage-control feedback loop of the converter. PIN 4: FB - The error amplifier inverting input pin. The FB pin and COMP pin are used to compensate the voltage-control feedback loop. PIN 5: GND - Ground pin. PIN 6: PHASE - Over-current detection pin. Connect the PHASE pin to the source of the external N-MOSFET. This pin detects the voltage drop across the MOSFET RDS(ON) for over-current protection. PIN 7: UGATE - External MOSFET gate drive pin. Connect this pin to the gate of the external MOSFET. PIN 8: VCC - The chip power supply pin. Recommended supply voltage is 12V. Rev.2.01 6/26/2003 |
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Ähnliche Beschreibung - SS6580L |
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