MIC5020 Micrel Semiconductor, MIC5020 Datasheet
MIC5020
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MIC5020 Summary of contents
Page 1
... output provides a fault indication when the sense inputs are tripped. The MIC5020 is available in 8-pin SOIC and plastic DIP packages. Other members of the MIC502x series include the MIC5021 high-side driver and the MIC5022 half-bridge driver with a cross-conduction interlock. ...
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... MIC5020 Pin Configuration Block Diagram 6V Internal Regulator C INT 2I Sense + Sense – 50mV Input Transistor Count: 82 Pin Description Pin Number Pin Name Input 3 Fault Gnd 6 Sense + 7 Sense – 8 Gate October 1998 1 V Gate Input Sense ...
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... MIC5020 Absolute Maximum Ratings Supply Voltage (V ) .................................................. +55V DD Input Voltage ................................................ –0.5V to +15V Sense Differential Voltage .......................................... 6.5V Sense + or Sense – to Gnd .......................... –0.5V to +50V Fault Voltage ............................................................... +50V Current into Fault ....................................................... 50mA Timer Voltage (C ) ..................................................... +5.5V T Electrical Characteristics Gnd = 0V 12V, Sense +,– = 0V, Fault = Open ...
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... MIC5020 Typical Characteristics Supply Current vs. Supply Voltage 3 3.0 2.5 2.0 1 1.0 0 (V) SUPPLY Input Current vs. Input Voltage 100 V = 12V SUPPLY (V) IN Sense Threshold vs. Temperature -60 - 120 150 TEMPERATURE ( C) 5µ ...
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... Supply Voltage A feature of the MIC5020 is that its supply voltage rating 50V is higher than many other low-side drivers. The minimum supply voltage required to fully enhance an N- channel MOSFET is 11V. ...
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... MIC5020 Lamp Driver Application Incandescent lamps have a high inrush current (low resis- tance) when turned on. The MIC5020 can perform a “soft start” by pulsing the MOSFET (overcurrent condition) until the filament is warm enough for its current to decrease (resistance increases). The sense resistor is selected so the voltage across the sense resistor drops below the sense threshold (50mV) as the filament becomes warm ...
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... Gnd T Figure 4. Faster MOSFET Switching Circuit NPN and PNP transistors are used to respectively charge and discharge the MOSFET gate. The MIC5020 gate current is multiplied by the transistor . The switched circuit voltage can be increased above 40V by selecting transistors with higher ratings. Remote Overcurrent Limiting Reset ...