Product category: Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: A3974
Edited by the Electronicstalk Editorial Team on 14 March 2002
Dual DMOS full-bridge motor driver IC
Allegro MicroSystems has a new DMOS dual full-bridge motor driver integrated circuit for the pulsewidth modulated current control of two DC motors
Related stories
Relay driver chip for automotive applications
An automotive-grade relay-driver IC provides robust performance over extended voltage and temperature ranges
Driver IC suits DC motors
The compact package of the A3985 means that a complete high-current microstepping motor driver or dual DC motor system can be implemented with limited PC board space
Allegro MicroSystems has a new DMOS dual full-bridge motor driver integrated circuit, the A3974, for the pulsewidth modulated current control of two DC motors. The new device can provide continuous output currents up to +/-1.5A and operating voltages up to 50V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast and mixed current-decay modes.
Independent 'enable' input terminals are provided for use in controlling the speed and torque of each DC motor with externally applied PWM control signals.
'Sleep' and 'idle' modes are available for energy conservation.
Synchronous rectification circuitry allows the load current to flow through the low 'on' resistance of the DMOS output driver during the current decay.
Further reading
Charge pump cuts the cost of LED driving
High-efficiency charge pump IC offers a simple low-cost method of driving up to six white LEDs in various application configurations
Driver cuts LED display component count
A 3bit constant-current LED driver enables users to minimise the number of components needed to drive LEDs with large pixel spacing
This feature eliminates the need for external clamp diodes in most applications, saving cost and external component count and minimising power dissipation.
Internal circuit protection includes thermal shutdown with hysteresis, undervoltage monitoring of the drive voltage and the charge pump, and crossover-current protection.
Special power-up sequencing is not required.
The new driver IC is supplied in a 44-lead plastic PLCC with four copper batwing tabs for maximum heat dissipation.
The power tabs are at ground potential and need no electrical isolation.
• Allegro MicroSystems Europe: contact details and other news
• Email this news to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Related Business News
Applications/Solutions
High-performance analog ICs provide efficient, compact and dependable solutions for engine management systems, body electronics and comfort systems.
Board: Druggists Must Fill Prescriptions
Druggists who believe 'morning-after' birth control pills are tantamount to abortion can't stand in the way of a patient's right to the drugs, state regulators have decided.
Sec Aide: Risk In Credit-default Swaps
The Securities and Exchange Commission is raising the possibility that an increasingly popular type of financial instrument may be used to engage in insider trading -- but there may be questions about the SEC's jurisdiction over the products.
Company Profile for Intelligentz Corporation
Intelligentz provides not only a cutting edge RFID solution, but the software to make it work. Dedication makes us strive to exceed all of your expectations.
Tcdi(r) Announces Staff Additions
Tcdiâ® , a market leader in Litigation Technology, today announces the addition of five new employees.
Search the Pro-Talk network of sites
