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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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MIC5022BWM Fiches technique(PDF) 2 Page - Micrel Semiconductor |
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MIC5022BWM Fiches technique(HTML) 2 Page - Micrel Semiconductor |
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2 / 10 page  MIC5022 Micrel, Inc. MIC5022 2 July 2005 Pin Description DIP Pin No. SOIC Pin No. Pin Name Pin Function 1 1 VDD Supply: +12V to +36V. Decouple with ≥ 10µF capacitor. 2 3 Input TTL Compatible Input: Logic high turns the high-side external MOSFET on and the low-side external MOSFET off. Logic low turns the high-side external MOSFET off and the low-side external MOSFET on. An internal pull-down returns an open pin to logic low. 3 4 Fault When either sense voltage exceeds threshold, open collector output is open circuit for 5µs (tG(ON)), then pulled low for tG(OFF). tG(OFF) is adjustable from CT. 4 5 CTH Retry Trimming Capacitor, High Side: Controls the off time (tG(OFF)) of the overcurrent retry cycle. (Duty cycle adjustment.) • Open = approx. 20% duty cycle. • Capacitor to Ground = approx. 20% to < 1% duty cycle. • Pullup resistor = approx. 20% to approx. 75% duty cycle. • Ground = maintained shutdown upon overcurrent condition. 5 6 Enable Output Enable: Disables operation of the output drivers; active high. An internal pull-down returns an open pin to logic low. 6 7 CTL Retry Trimming Capacitor, Low Side: Same function as CTH. 7 8 Gnd Circuit Ground 8 8 Sense L + Current Sense Comparator (+) Input, Low Side: Connect to source of low- side MOSFET. A built-in offset (nominal 50mV) in conjunction with RSENSE sets the load overcurrent trip point. 9 10 Sense L – Current Sense Comparator (–) Input, Low Side: Connect to the negative side of the low-side sense resistor. 10 11 Gate L Gate Drive, Low Side: Drives the gate of an external power MOSFET. Also limits VGS to 15V max. to prevent Gate to Source damage. Will sink and source current. 11 12 Sense H + Current Sense Comparator (+) Input, High Side: Connect to source of high- side MOSFET. A built-in offset (nominal 50mV) in conjunction with RSENSE sets the load overcurrent trip point. 12 13 Source H – Current Sense Comparator (–) Input, High Side: Connect to the negative side of the high-side sense resistor. 13 14 Gate H Gate Drive, High Side: Drives the gate of an external power MOSFET. Also limits VGS to 15V max. to prevent Gate to Source damage. Will sink and source current. 14 15 VBOOST Charge Pump Boost Capacitor: A bootstrap capacitor from VBOOST to the MOSFET source pin supplies charge to quickly enhance the external MOSFET’s gate . Pin Configuration DIP Package SOIC Package (N) (WM) 14 2 3 4 5 6 7 13 12 10 9 8 11 VDD VBOOST Input Fault CTH Enable CTL Gnd Gate H Sense H– Sense H+ Gate L Sense L– Sense L+ 1 14 2 3 4 5 6 7 13 12 10 9 11 VDD VBOOST Input Fault CTH Enable CTL Gnd Gate H Sense H– Sense H+ Gate L Sense L– Sense L+ NC NC 8 15 16 1 |
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