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Two Phase 5V/12V BLDC All-In-One Fan and Motor Drive Latch with Output Zener Clamp Reverse Supply Protection and Thermal Shutdown

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The AH276 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. 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 · 350mA (avg) Output Sink Current · Reversed Supply Voltage Protection · Build in Over Temperature Protection Function · -20°C to 85°C Operating Temperature · Low Profile TO-94 (SIP-4L) Package · ESD Rating: 300V (Machine Model)


· Dual-Coil Brushless DC Motor · Dual-Coil Brushless DC Fan · Revolution Counting · Speed Measurement

Product Specifications

Product Parameters

Operating Voltage (V) 3.5 to 16 V
SupplyCurrent (mA) 12 mA
Average OutputDrive Current (mA) 350 mA
Peak Output Current (mA) 750 mA
Typical Total RDS(ON)(NMOS and PMOS Combined) 1 @ 14V Ω
Typical Zener Breakdown Voltage (V) 55 V
Operating Point Bop Gauss (Min) 10, 5, 0
Operating Point Bop Gauss (Typ) -
Operating Point Bop Gauss (Max) 50, 70, 100
Release Point Brp Gauss (Min) -50, -70, -100
Release Point Brp Gauss (Typ) -
Release Point Brp Gauss (Max) 10, -5, -
Lock Detect, Shut-Down and Auto Start -
Frequency Generator (FG) and Rotation Detect - RD
Operating Ambient Temperature (°C) -20 to 85 °C

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2527 2021-06-09 2021-09-09 Additional Wafer Source (GFAB, JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Additional Assembly/Test
(A/T) Site (CAT)