CA3275: Dual Full Bridge Driver

The CA3275 Dual Full Bridge Driver is intended for general purpose applications requiring Dual Full Bridge drive or switching, including direction and pulse-width modulation for position control. While all features of the IC may not be utilized or required, they would normally be used in instrumentation systems with quadrature coils, such as air-core gauges, where the coils would be driven at frequencies ranging from 200Hz to 400Hz. The coils are wrapped at 90o angles for independent direction control. Coils wound in this physical configuration are controlled by pulse width modulation, where each coil drive is a function of the sine or cosine versus degrees of movement. The direction control is used to change the direction of the current in the H-Driver coil.

The switch rate capability of the IC is typically 30kHz regardless of the inductive load. Over-current limiting is used to limit short circuit current. Over-voltage protection (in the range of 18V to 24V) causes the device to shut down the output current drive. Thermal shutdown limits power dissipation on the chip. The CA3275 is supplied in a 14 lead dual-inline plastic package.

Key Features
  • Two Full Bridge Drivers
  • ± 150mA Maximum Current
  • Logic Controlled Switching
  • Direction Control
  • PWM IOUT Control
  • 18V Over-Voltage Protection
  • 300mA Short-Circuit Protection
  • Nominal 8V to 16V Operation
  • Internal Voltage Regulation With Bandgap Reference
Applications
  • Dual Full Bridge Driver For Air Core Gauge Instrumentation
  • µP Controlled Sensor Data Displays
  • Speedometer Displays
  • Tachometer Displays
  • Stepper Motors
  • Slave Position Indicators
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1116: Elantec CMOS applicationsPDF13 Nov 2014231 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
CA3275 DatasheetPDF14 Nov 201431 KB
White Papers
TitleTypeUpdatedSizeOther Languages
Five Easy Steps to Create a Multi-Load Power SolutionPDF30 Jan 2017502 KB
How Green is Your Cloud?PDF05 May 2015275 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
CA3275E14 Ld PDIP0.9714N/ANA
CA3275 Datasheet 14 Nov 2014
AN1116: Elantec CMOS applications 13 Nov 2014
Five Easy Steps to Create a Multi-Load Power Solution 30 Jan 2017
How Green is Your Cloud? 05 May 2015