AH5772 (Not Recommended for new design)

NRND = Not Recommended for New Design

Low Noise Single Phase 9V/12V/15V BLDC All-In-One Fan and Motor Driver with Overvoltage Protection and Thermal Shutdown High Performance

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Description

The AH5772 is a single chip solution for driving single-coil brushless direct current (BLDC) fans and motors. The integrated full-bridge driver output stage uses soft switching to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution.

To simplify system circuit and minimize external components, the device integrates a stable high sensitivity Hall-Effect sensor, voltage and temperature compensated internal references, amplifiers and the output H-bridge power switches with low RDSON.

To help protect the motor coil, the AH5772 provides Rotor Lock Protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. In case of over voltage, the device shuts down the output drive and enters standby mode to help prevent over voltage stress on the coil. Over temperature shutdown provides thermal protection for the device.

The AH5772 is available in industry standard TO94 package.

Feature(s)

Supports Single-phase Full Wave BLDC Fan/Motor Drive
Wide Operating Voltage Range: 2.4V to 18V
Built-in High Sensitivity Hall Effect Sensor
Very Low Temperature and Voltage Coefficient of the Magnetic Operating Switch Points
Built-in H-Bridge with Low RDSON Resistance
Soft Switching for Low Noise DC Fan Motor Applications
Rotor Lock Protection (Lock Detection, Output Shutdown and Automatic Re-start)
Over Voltage Shutdown
Thermal Protection
No External Timing Capacitor - Reduces the Numbers of External Components Required
Industry Standard TO94 Package
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device

Application(s)

5V / 9V / 12V / 15V Min. BLDC Cooling Fans
Netbook/ Notebook and Desktop BLDC Fans
Instruments Cooling Fans
Medium Voltage/ Low Power BLDC Motors

Product Specifications

Product Parameters

Average OutputDrive Current (mA)	450
Frequency Generator (FG) and Rotation Detect	-
Lock Detect, Shut-Down and Auto Start	Yes
Operating Ambient Temperature (°C)	-40 to 105
Operating Point Bop Gauss (Max)	-
Operating Point Bop Gauss (Min)	5
Operating Point Bop Gauss (Typ)	20
Operating Voltage (V)	2.4 to 18
Peak Output Current (mA)	1000
Release Point Brp Gauss (Max)	-
Release Point Brp Gauss (Min)	35
Release Point Brp Gauss (Typ)	-
Soft-Switch	Yes
Speed Control	VDD PWM
SupplyCurrent (mA)	3.2
Typical Total R_DS(ON)(NMOS and PMOS Combined)	1.26

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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-2672	2024-03-11	2024-09-07	Device End of Life (EOL)
PCN-2654	2024-02-15	2024-04-28	Device End of Life (EOL)