BCD Semiconductor Manufacturing Limited AH277A
The AH277A is an integrated Hall sensor with output driver designed for electronic commutation 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, a temperature compensation circuit to compensate the temperature drift of Hall sensitivity and two complementary 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.| Part No. | AH277A |
|---|---|
| Datasheet | AH277A Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | COMPLEMENTARY OUTPUT HALL EFFECT LATCH |
| Buy | Stock & Price |
GENERAL DESCRIPTION
FEATURES
Data Sheet AH277A 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).● On-Chip Hall Sensor
● 3.5V to 16V Supply Voltage
● 400mA (avg) Output Sink Current
● Reversed Supply Voltage Protection
● -20oC to 85oC Operating Temperature
● Low Profile TO-94 (SIP-4L) Package
● ESD Rating: 300V (Machine Model)
APPLICATIONS
● Dual-Coil Brushless DC Motor● Dual-Coil Brushless DC Fan
● Revolution Counting
● Speed Measurement AH277A is available in TO-94 (SIP-4L) package. Oct. 2009 Rev. 1. 6 TO-94 Figure 1. Package Type of AH277A BCD Semiconductor Manufacturing Limited 1 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Pin Configuration Z4 Package (TO-94) 4 GND 3 DOB 2 DO 1 VCC Figure 2. Pin Configurati...
