TITLE

Full-bridge DC motor driver

PUB. DATE
November 2005
SOURCE
Portable Design;Nov2005, Vol. 11 Issue 11, p44
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
The article describe Allegro MicroSystems' A1441 full-bridge motor driver, designed to drive single-phase, low-voltage, bipolar brushless direct current motors. Commutation of the motor is achieved by the use of a single Hall element to detect the position of an alternating pole ring magnet. An on-chip charge pump circuit allows for the use of a MOS full-bridge output complete with body diodes, eliminating the need for flyback diodes or capacitors. All necessary circuitry is integrated and no external devices are required. A bypass capacitor is recommended to lower switching transients for reduced radiated emissions.
ACCESSION #
18947730

 

Related Articles

  • A Step-Up Converter Based on Charge Pump and Dual Boost. Hwu, K. I.; Tu, W. C.; Chuang, C. F. // International Review of Electrical Engineering;Jul/Aug2012, Vol. 7 Issue 4, p4814 

    In this paper, a novel step-up converter is presented, whose operating principles are mainly based on charge pump capacitors and dual boost inductors. Furthermore, although three switches are used, no isolated gate driver is needed instead of one half-bridge gate driver and one low-side gate...

  • Single-Cell Regulated Charge Pump Draws Low Quiescent Current. D.MOORE, BRUCE // Electronic Design;6/6/2013, Vol. 61 Issue 6, p68 

    The article describes the design of a single-cell regulated charge pump which draws low quiescent current. The design demonstrates the application of a low-voltage microcontroller to a capacitor-based charge pumps (Q-pumps). Mathematical formulas in the computation of the output voltage of the...

  • Driver pushes white LEDs where they need to go. Schweber, Bill; Granville, Fran // EDN;3/17/2005, Vol. 50 Issue 6, p22 

    This article provides information on the SC606 controlled current drive from Semtech. The SC606 is a charge pump for white or colored light emitting diodes (LED) that handles six of these devices. With this integrated circuit, designers can program the six LED as three pairs, driving each LED...

  • Tighter tolerance in Allegro switch.  // Electronics Weekly;7/13/2005, Issue 2202, p1 

    The article focuses on Allegro MicroSystems Inc. which has introduced the BiCMOS A120x family of ultra-sensitive bipolar Hall-effect switches as tighter-tolerance replacements for its A313x line. The devices power-on in under 4µs and, to avoid sliver pulses, have a 1.5µs blanking pulse....

  • Regulated output charge pumps.  // Electronics Weekly;8/4/2004, Issue 2158, p19 

    Catalyst Semiconductor Inc. has introduced a pair of low noise, regulated output charge pumps that implement a 2MHz constant switching frequency, enabling the use of small 1µ F ceramic capacitors. The CAT3200-5 and CAT3200 devices are designed to continuously monitor and control the inrush...

  • Adaptive-Gain Charge-Pump Technique Drives White LEDs. Nurzad, Dario // Electronic Design;1/19/2006, Vol. 54 Issue 2, p60 

    The article discusses the methods in boosting the battery voltage of a white light emitting diode (LED). The advantage of the step-up direct current to direct current converter method is its high efficiency over all load and input voltage conditions since the input voltage may be boosted to the...

  • PRODUCT Q&As.  // Electronic Design;7/21/2005, Vol. 53 Issue 16, p41 

    This article presents information on new products related to the high technology industry launched in the U.S. With over 90% peak efficiency, the LM2751 is a constant frequency switched capacitor charge pump. Using constant frequency pre-regulation, the LM2751 minimizes conducted noise on the...

  • High-current charge pump.  // Portable Design;May2006, Vol. 12 Issue 5, p40 

    The article presents information on AnalogicTech's high current charge pump, AAT3174. The AAT3174 is a high-current, high-efficiency charge pump for multifunctional LED applications. According to the company, this device simplifies the design of applications supporting both flash and movie modes...

  • Developing Spring-Roll Dielectric Elastomer Actuator System Based on Optimal Design Parameters. Awadalla, Medhat; Anees, Besada // International Journal of Computer Science Issues (IJCSI);Sep2011, Vol. 8 Issue 5, p46 

    To develop a well designed practical spring-roll dielectric elastomer actuator system, we have to optimize its design parameters. In our pervious work, we have achieved the design parameters without taking the applied voltage required to activate the actuator into consideration because the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics