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MIC5022 Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC5022 Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 9 page MIC5022 Micrel MIC5022 178 September 1999 MIC5022 Half-Bridge MOSFET Driver Features • 12V to 36V operation • 600ns rise time into 1000pF (high side) • TTL compatible input with internal pull-down resistor • Outputs interlocked to prevent cross conduction • TTL compatible enable • Fault output indication • Individual overcurrent limits • Gate protection • Internal charge pump (high-side) • Current source drive scheme reduces EMI Applications • Motor control • Switch-mode power supplies General Description The MIC5022 half-bridge MOSFET driver is designed to operate at frequencies up to 100kHz (5kHz PWM for 2% to 100% duty cycle) and is an ideal choice for high speed applications such as motor control and SMPS (switch mode power supplies). A rising or falling edge on the input results in a current source pulse or sink pulse on the gate outputs. This output current pulse can turn on a 2000pF MOSFET in approximately 1 µs. The MIC5022 then supplies a limited current (< 2mA), if necessary, to maintain the output states. Two overcurrent comparators with nominal trip voltages of 50mV make the MIC5022 ideal for use with current sensing MOSFETs. External low value resistors may be used instead of sensing MOSFETs for more precise overcurrent control. Optional external capacitors placed on the C TH and CTL pins may be used to individually control the current shutdown duty cycles from approximately 20% to <1%. Duty cycles from 20% to about 75% are possible with individual pull-up resis- tors from C TL and CTH to VDD. An open collector output provides a fault indication when either sense input is tripped. The MIC5022 is available in 16-pin wide SOIC and 14-pin plastic DIP packages. Other members of the MIC502x family include the MIC5020 low-side driver and the MIC5021 high-side driver. Typical Application VDD Input Fault CTH Enable CTL Gnd VBOOST Gate H Sense H– Sense H+ Gate L Sense L– Sense L+ CTL CTH 10µF RS1 RS2 2.7nF M +12V to +36V MIC5022 TTL Input (PWM signal) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 DC Motor Control Application Ordering Information Part Number Temperature Range Package MIC5022BWM –40 °C to +85°C 16-pin Wide SOIC MIC5022BN –40 °C to +85°C 14-pin Plastic DIP |
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