AH477Z4-BE1 查看數據表（PDF） - BCD Semiconductor

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AH477Z4-BE1

SINGLE PHASE HALL EFFECT LATCH

BCD Semiconductor 

SINGLE PHASE HALL EFFECT LATCH

Description

The AH477 is an integrated Hall sensor with output driver

designed for electronic commutation of brushless DC

motor applications. The device includes an on-chip Hall

sensor for magnetic sensing, an amplifier that amplifies

the Hall voltage, a comparator to provide switching hys-

teresis for noise rejection, a bi-directional drivers for sink-

ing and driving large current load. It also includes an

internal bandgap regulator to provide temperature com-

pensated bias for internal circuits and allows a wide oper-

ating supply voltage range.

Placing the device in a variable magnetic field, if the mag-

netic 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 driveand

DOB turned to sink.

Parametric Table

Product Brief

AH477

Supply Voltage (V)

Output Down Saturation Voltage (V)

Output Up Saturation Voltage (V)

Supply Current (mA)

Hysteresis (Gauss)

Package

4 to 20

0.25

1.0

14

70

TO-94

Features

· On-Chip Hall Sensor

· Operating Voltage: 4V to 20V

· H-Bridge Output Drivers for Single Coil

· Internal Bandgap Regulator for Temperature Com-

pensation

· Low Output Switching Current Noise

· -20oC to 85oC Operating Temperature

· Low Profile TO-94 (SIP-4L) Package

· ESD Rating: 3000V (Human Body Model)

Benefits

· Minimum External Components

· Good High Temperature Performance

· High Efficiency

· Rotate Reposefully

Applications

· Single-Coil Brushless DC Motor

· Single-Coil Brushless DC Fan

Additional Available Materials

· Samples

· Preliminary Datasheet

· Reliability Report

· ESD Report

Nov. 2007

BCD Semiconductor Manufacturing Limited

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