Site Map • Contact Us
中文 • English

High-Performance Power ICs and Hall-Effect Sensors

• Search Allegromicro.com:
  
• Home
• Products
  • • Hall-Effect Sensors
    • Power ICs
    • Power Management
    • Sanken
  • Applications
    • Automotive
    • LED Lighting and Displays
    • Office Automation
    • Portable
  • Part Numbers
  • Design Center
  • Packaging
  • Store
• Corporate
  • About Us
  • Contact Us
  • Environment
  • Facilities
  • Jobs
  • Legal
    • Terms and Conditions
      of Sale
  • Press Room
  • Quality
• Sales
  • Americas
  • Europe
  • Asia Pacific
  • Japan
• Site Map
• Feedback

Related Links:

Datasheets:
A3950: DMOS Full-Bridge Motor Driver (PDF)

Selection Guides:
Power Integrated Circuits,

Power Motor Drivers - Full-Bridge

when this product is updated

Press Releases:
A3950: Allegro Announces New DMOS Full-Bridge Motor Driver with Over-Current Protection

A3950
DMOS Full-Bridge Motor Driver

Features

• Low R_DS(on) outputs
• Overcurrent protection
• Motor lead short-to-supply protection
• Short-to-ground protection
• Sleep function
• Synchronous rectification
• Diagnostic output
• Internal undervoltage lockout (UVLO)
• Crossover-current protection

Description

Designed for PWM (pulse width modulated) control of dc motors, the A3950 is capable of peak output currents to ±2.8 A and operating voltages to 36 V.

PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a dc motor with externally applied PWM control signals. Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.

Internal circuit protection includes motor lead short-tosupply / short-to-ground, thermal shutdown with hysteresis, undervoltage monitoring of V_BB and V_CP, and crossover-current protection.

The A3950 is supplied in a thin profile (<1.2 mm overall height) 16 pin TSSOP package (LP), and a very thin (0.75 mm nominal height) QFN/MLP package. Both packages provide an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte tin leadframe plating.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A3950SEU-T	16-lead QFN/MLP	Yes	view data	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A3950SEUTR-T	16-lead QFN/MLP	Yes	view data	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A3950SLP-T	16-lead TSSOP	Yes	view data	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A3950SLPTR-T	16-lead TSSOP	Yes	view data	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.