5275

5275 COMPLEMENTARY OUTPUT ® POWERHALL LATCH 5275 COMPLEMENTARY OUTPUT POWER HALL® LATCH Type UGN5275K latching Hall-effect sensors are bipolar integrated circuits designed for electronic commutation of brushless dc motors. They feature open-collector complementary power outputs that are capable of sinking up to 300 mA continuously. Increased current ratings, complementary outputs, and sensitive switching points that are stable over temperature and time ideally suit these devices for minimum-component brushless dc motor designs. Each sensor IC includes a Hall-voltage generator, an operational amplifier, a Schmitt trigger, a voltage regulator, and large-area dual npn-output transistors. The regulator allows the IC to operate with supply voltages ranging from 4.5 V to 14 V. On-chip compensation circuitry stabilizes switch point performance over temperature. The large bipolar junction output transistors are fed by a unique driver stage, which minimizes power dissipation within the IC. The magnetic operation of this device is similar to that of the UGN3275K complementary-output Hall-effect latch. Output Q of the IC switches to the LOW state when the internal Hall generator experiences a magnetic field that exceeds the rated operate point. Output Q switches HIGH within one µs of the Output Q change of state. When the device is exposed to a sufficient magnetic field of opposite polarity, Output Q returns to the HIGH state, and Output Q returns to the LOW state. The UGN5275K is rate...