OCH2987

W W W OCH2987.ORIENT-CHIP.COM 1 234 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. OCH2987 is available in SIP-4L package and is rated over the -40°C to 125°C. ◼ Features ⚫ One-chip Solution (Hall Element + Driver) ⚫ Input Voltage Range : 3V to 24V ⚫ Low Output Swi...