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High-Performance Power ICs and Hall-Effect Sensors
Allegro MicroSystems, Inc. Announces Family of Pre-Driver
ICs for Driving High Current Automotive and Industrial Actuators
New Pre-Driver Family (A3932, A3935, A3938, A3940, A3946) 
Worcester, MA — January 14, 2004 — Allegro MicroSystems, Inc. announces the introduction of a family of pre-driver IC products designed to drive external N-Channel MOSFETs. This family of products fills the need for driving either DC brush, or DC brushless (BLDC) motors in systems with motor supply voltages as low as 7 V and as high as 60 V.
| Part Number | Operating Voltage | Output Topology | Package | Special Features |
|---|---|---|---|---|
| A3932 | 12 V to 50 V | Three-phase bridge | 32L PLCC | On-chip commutation logic |
| A3935 | 7 V to 40 V | Three-phase bridge | 36L QSOP 48L e-LQFP |
Automotive Grade |
| A3938 | 12 V to 50 V | Three-phase bridge | 36L QSOP 38L TSSOP |
Power-down Brake mode |
| A3940 | 7 V to 40 V | Full-bridge | 28L SOIC 28L e-TSSOP |
Automotive Grade |
| A3946 | 7 V to 60 V | Half-bridge | 16L SOIC 16L e-TSSOP |
Automotive Grade |
A key target market for these pre-driver ICs is the automotive market. Important features such as wide operating temperature range, fault diagnostics and reporting, and operation over a wide supply voltage range make the Allegro product family an excellent fit for the harsh automotive environment. In addition, several of the ICs are designed to fully operate up to 60 V allowing use in next generation automotive 42 V systems.
The Allegro pre-driver family is manufactured using Allegro's ABCD3 (Allegro Bipolar CMOS DMOS 3rd generation) process. Each IC is offered in various options of surface mount packages, including some in low profile and thermally efficient e-LQFP and e-TSSOP packages.
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With over 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, as well as free samples on our products, can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director – Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com