A4940KLPTR-T Allegro Microsystems Inc, A4940KLPTR-T Datasheet
A4940KLPTR-T
Specifications of A4940KLPTR-T
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A4940KLPTR-T Summary of contents
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Features and Benefits ▪ High current gate drive for N-channel MOSFET full bridge ▪ Independent control of each MOSFET ▪ Charge pump for low supply voltage operation ▪ Cross-conduction protection with adjustable dead time ▪ 5 supply ...
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... A4940 Selection Guide Part Number A4940KLPTR-T 4000 pieces per reel Absolute Maximum Ratings* Characteristic Load Supply Voltage Logic Supply Voltage Logic Inputs Logic Outputs Pin VREG Pins CP1, CP2 Pin RDEAD Pins SA, SB Pins GHA, GHB Pins GLA, GLB Pins CA, CB ...
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A4940 VBB VDD Diagnostics & FAULT Protection AHI ALO Control Logic BHI BLO RESET RDEAD Automotive Full Bridge MOSFET Driver Functional Block Diagram C P CP2 CP1 Charge VREG Pump Regulator Bootstrap Monitor CA GHA High Side SA Low GLA ...
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A4940 ELECTRICAL CHARACTERISTICS Characteristics Supply and Reference V Functional Operating Range Range DD V Quiescent Current BB V Quiescent Current DD VREG Output Voltage Bootstrap Diode Forward Voltage Bootstrap Diode Resistance Bootstrap Diode Current Limit Gate Output ...
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A4940 ELECTRICAL CHARACTERISTICS Characteristics Logic Inputs and Outputs FAULT Output (Open drain) 3 FAULT Output Leakage Current 3 RDEAD Current Input Low Voltage Input High Voltage Input Hysteresis Input Current (Except RESET) 3 Input Pull-down Resistor (RESET) RESET Pulse Time ...
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A4940 The A4940 is a full-bridge MOSFET driver (pre-driver) requir- ing an unregulated supply and a logic supply from 3 to 5.5 V. The four gate drives are capable of driving a wide range of ...
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A4940 on the upper half of the drive, sourcing current to the gate of the high-side MOSFET in the external motor-driving bridge, turning it on. GHx going low turns on the lower half of the drive, sinking current from the ...
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A4940 FAULT Pin This is an open drain output fault flag, which indi- cates a fault condition by its state, as shown in table 2. It must be pulled to V with an external resistor, typically kΩ. ...
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A4940 Dead Time To prevent cross-conduction (shoot-through) in any phase of the power MOSFET bridge necessary to have a dead time delay between a high-side or low-side turn-off and the next DEAD complementary turn-on event. The ...
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A4940 Bootstrap Capacitor Selection The bootstrap capacitors, CBOOTx, must be correctly selected to ensure proper operation of the A4940. If the capacitances are too high, time will be wasted charging the capacitor, resulting in a limit on the maximum duty ...
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A4940 Supply Decoupling Because this is a switching circuit, there are current spikes from all supplies at the switching points. As with all such circuits, the power supply connections should be decoupled with a ceramic capacitor, typically 100 nF, between ...
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A4940 Cx 20V 19V 18V GHx 18V 18V Sx VREG 18V GLx GND (A) Gate drive outputs ESD AHI 3 kΩ ALO BHI BLO 8.5V (E) Logic inputs: no pull-down resistor Automotive Full Bridge MOSFET Driver Input and Output Structures ...
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A4940 Terminal List Number AGND AHI ALO BHI BLO CA CB CP1 CP2 FAULT GHA GHB GLA GLB GND PAD RDEAD RESET SA SB VBB VDD VREG Automotive Full Bridge MOSFET Driver Pin-out Diagram FAULT 24 RESET 1 23 RDEAD ...
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A4940 Package LP 24-Pin TSSOP with Exposed Thermal Pad 7.80±0. 4.32 NOM 24X 0.10 C 0.30 0.65 BSC 0.19 Copyright ©2009, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. ...