AH266 Datasheet | BCD Semiconductor

Data Sheet HIGH VOLTAGE HALL EFFECT LATCH General Description The AH266 is an integrated Hall sensor with output driver designed for electronic mutation of brushless DC motor applications. The device includes an onchip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection and two plementary darlington open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits and allows a wide operating supply voltage ranges. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the pin DO will be turned low (on) and pin DOB will be turned high (off). This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned high (off) and DOB turned low (on). AH266 is available in TO-94 (SIP-4L) package. .. Features - - - - - - - - On-Chip Hall Sensor 4V to 30V Supply Voltage 400m A (avg) Output Sink Current Build in Protection Diode for Reverse Power Connecting -20o C to 85o C Operating Temperature Low Profile TO-94 (SIP-4L) Package Build in Over Temperature Protection Function ESD Rating: 300V(Machine Model) Applications - - - - 12V/24V Dual-Coil Brushless DC Motor/Fan Power Supply and Switchboard munications Facilities Industrial Equipment TO-94 Figure 1. Package Type of AH266 Feb. 2007 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Data Sheet HIGH VOLTAGE HALL EFFECT LATCH Pin Configuration Z4 Package (TO-94) 4 3 2 1 GND DOB DO VCC Figure 2. Pin Configuration of AH266 (Top View) Pin Description Pin Number 1 2 3 4 Pin Name VCC DO DOB GND Supply voltage Output 1 Output 2 Ground Function Feb. 2007 Rev. 1. 1 2 BCD Semiconductor Manufacturing Limited Data Sheet HIGH VOLTAGE HALL EFFECT LATCH Functional Block Diagram VCC 1 2...