3971 DUAL DMOS FULL-BRIDGE DRIVER

Allegro MicroSystems

Description

3971 ADVANCE INFORMATION (Subject to change without notice) May 2, 2000 DUAL DMOS FULL-BRIDGE DRIVER Designed to interface between external PWM contr.
No (Internal) connection Logic ground Control input, bridge 1 Output A, bridge 1 Load supply voltage, bridge 1 Ground Sense resistor, bridge 1 Output.

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Datasheet Specifications

Part number: 3971
Manufacturer: Allegro MicroSystems
File Size: 141.47 KB
Datasheet: 3971_AllegroMicroSystems.pdf
Description: DUAL DMOS FULL-BRIDGE DRIVER

Features

* I ±2.5 A Load Current Capability per Bridge I Parallel Outputs for 5 A Load-Current Capability I Low rDS(on) Outputs Typically 325 mΩ source, 175 mΩ sink I Synchronous Rectification via Control Logic I Internal Undervoltage Monitor I Crossover-Current Protection I Source Connections for External Cur

Applications

* the two DMOS full bridges in the A3971 may be connected in parallel as shown below. The current will be shared equally in each full bridge due to the positive temperature coefficient of the DMOS rDS(on). PWM CONTROL +5 V 1 2 3 4 NC VDD 24 23 22 21 15
* 50 V VBB1 VBB2 15
* 50 V LOGIC

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3971 DUAL DMOS FULL-BRIDGE DRIVER Allegro MicroSystems

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