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Single phase Hall effect latch with noise rejection and integrated output driver DIODES AH477AZ4 BG1

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Single phase Hall effect latch with noise rejection and integrated output driver DIODES AH477AZ4 BG1

BHYS : 7mT

Operating Current : 13.5mA

Operation Points : 10mT

Release Points : 10mT

Operating Temperature : -20℃~+85℃

Voltage - Supply : 3.5V~18V

Description : SIP-4 Switches (Solid State) RoHS

Mfr. Part # : AH477AZ4-BG1

Model Number : AH477AZ4-BG1

Package : SIP-4

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Product Overview

The AH477A is a single-phase Hall effect latch with an integrated H-bridge output driver, designed for brushless DC motor applications. It features an on-chip Hall sensor, amplifier, comparator for noise rejection, and bi-directional drivers for high current loads. An internal bandgap regulator ensures temperature compensation and a wide operating voltage range. The device switches output states based on magnetic flux density thresholds, making it suitable for PWM power supply control speed applications in single-coil brushless DC motors and fans.

Product Attributes

Brand: BCD Semiconductor Manufacturing Limited
Package Type: TO-94 (SIP-4L)
Certifications: RoHS compliant and green (designated with "G1" suffix)

Technical Specifications

Parameter	Symbol	Value	Unit	Notes
Supply Voltage	VCC	3.5 to 18	V	Recommended Operating Conditions
Magnetic Flux Density (Operating Point)	BOP	5 to 70 (Grade A) / 100 (Grade B)	Gauss	TA=25oC
Magnetic Flux Density (Releasing Point)	BRP	-70 to -5 (Grade A) / -100 (Grade B)	Gauss	TA=25oC
Hysteresis	BHYS	70	Gauss	TA=25oC
Output Saturation Voltage (Sink)	VSAT	0.45 to 0.65	V	VCC=14V, IO=200mA
Output Saturation Voltage (Drive)	VSAT	VCC- 1.3 to VCC- 1.0	V	VCC=14V, IO=200mA
Supply Current	ICC	13.5 to 16	mA	VCC=20V, Output Open
Output Rise Time	tr	0.5 to 1.0	s	RL=820, CL=20pF
Output Fall Time	tf	0.5 to 1.0	s	RL=820, CL=20pF
Continuous Output Current	IO	250	mA
Hold Output Current	IO	300	mA
Peak Output Current (start up)	IO	600	mA
Power Dissipation	PD	550	mW
Operating Temperature	TA	-20 to 85	oC
Storage Temperature	TSTG	-50 to 150	oC
ESD Rating (Human Body Model)		6000	V
Frequency (PWM Power)	f	0.1 to 25	kHz

2210281000_DIODES-AH477AZ4-BG1_C842030.pdf

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