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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.
About Allegro
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director - Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com