AH288 (Not Recommended for new design)

NRND = Not Recommended for New Design

Two Phase 9V/12V/24V BLDC All-In-One Fan and Motor Driver with Output Zener Clamp

Datasheet

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Description

AH288 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-drain transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection relatively. Rotor-lock shutdown detection circuit turns off the output driver when the rotor is blocked to avoid coil overheat. Then, the automatic recovery circuit will restart the motor. These protected actions are repeated and periodic during the blocked period. Until the blocking is removed, the motor recovers and runs normally.

Feature(s)

On chip Hall sensor

Rotor-locked shutdown

Automatically restart

Frequency generator (FG) output

Built-in Zener protection for output driver

Operating voltage: 3.8V to 28V

Output current: IO(AVE) = 400mA

Lead Free Package: SOT89-5L

SOT89-5L: Available in “Green” Molding Compound (No Br, Sb)

Lead Free Finish/RoHS Compliant

Product Specifications

Product Parameters

Average OutputDrive Current (mA)	500
Frequency Generator (FG) and Rotation Detect	FG
Lock Detect, Shut-Down and Auto Start	Yes
Operating Ambient Temperature (°C)	-40 to 100
Operating Point Bop Gauss (Max)	60
Operating Point Bop Gauss (Min)	10
Operating Point Bop Gauss (Typ)	30
Operating Voltage (V)	3.8 to 28
Peak Output Current (mA)	700
Release Point Brp Gauss (Max)	-10
Release Point Brp Gauss (Min)	-60
Release Point Brp Gauss (Typ)	-30
SupplyCurrent (mA)	2
Typical Total R_DS(ON)(NMOS and PMOS Combined)	2.25 @ 24V
Typical Zener Breakdown Voltage (V)	55

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

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-2505	2021-01-26	2021-07-26	Device End of Life (EOL)