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AH277A Folha de dados(PDF) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED |
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AH277A Folha de dados(HTML) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED |
1 / 2 page ©SiFirst Technology - 1 - Confidential SiFirst_DS_277A_V1.0 FEATURES ◆ On-Chip Hall Sensor ◆ 3.5V to 20V Supply Voltage ◆ 300mA (avg) Output Sink Current APPLICATIONS ◆ Dual-Coil Brush-less DC Motor ◆ Dual-Coil Brush-less DC Fan GENERAL DESCRIPTION The AH277A is an integrated Hall sensor with output driver designed for electronic commutation of brush- less DC motor applications. The device includes an on-chip 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. 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). AH277A is available in TO-94(SIP-4L) package. TYPICAL APPLICATION COIL1 COIL2 1 2 3 4 VCC DO DOB GND AH277A 470R 470R 2.2uF 2.2uF Pin Configuration TO94(Top View) |
Nº de peça semelhante - AH277A |
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Descrição semelhante - AH277A |
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