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OCH2987 - 350mA Single Phase Hall-Effect DC Fan Driver

Datasheet Summary

Description

The OCH2987 is an integrated Hall sensor with H-Bridged output driver designed for brushless DC motor applications.

Features

  • One-chip Solution (Hall Element + Driver).
  • Input Voltage Range : 3V to 24V.
  • Low Output Switching Current Noise.
  • Built-in VCC To GND reverse voltage protection.
  • Rotor Lock Protection (Lock detection, output shutdown and automatic re-start).
  • High Sensitivity Hall Sensor BOP(25GS),BRP(-25GS).
  • Thermal Shutdown Protection.
  • -40℃ to +125 ℃ Temperature Range.
  • RoHS Compliant.
  • Available in SIP-4L(TO94) package.

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Datasheet preview – OCH2987

Datasheet Details

Part number OCH2987
Manufacturer Orient Chip
File Size 816.13 KB
Description 350mA Single Phase Hall-Effect DC Fan Driver
Datasheet download datasheet OCH2987 Datasheet
Additional preview pages of the OCH2987 datasheet.

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Full PDF Text Transcription

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OCS Confidential DO NOT COPY OCH2987 350mA Single Phase Hall-Effect DC Fan Driver  General Description The OCH2987 is an integrated Hall sensor with H-Bridged output driver designed for brushless DC motor applications. The device is using HV process includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a comparator to provide switching hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the DO is turned to sink and DOB is turned to drive. This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned to drive and DOB turned to sink.
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