FD2157H

Smart motor driver with embedded Hall sensor

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Rev1.2 Jul. 06, 2009

P.1

FEELING

TECHNOLOGY

Features

Motor driver with high sensitivity Hall-effect sensor

Open drain MOS driver output

Lock-shutdown protection & auto-restart function

“Soft-switch” phase-switching technique to reduce vibration and acoustic noise

Thermal shutdown protection(TSD)

Available in SIP-4L package

For 24V DC motor / FAN systems

General Description

FD2157H is a two-phase half wave motor driver with embedded Hall-effect sensor IC. It integrates a open drain

MOS driver, a high sensitivity hall-effect sensor, an event timer for rotor locked in SIP-4L package, which make the

motors’ PCBs(printed circuit boards) design easy and fabricate the high efficiency and high voltage DC motors or

FANs as simply as possible.

For safety, Lock-shutdown function would turn the IC’s internal drivers off avoiding over-heat when the rotor is

locked, and IC will try to re-start the rotor’s torque after the time of these drivers’ shutdown.

Thermal-shutdown protection (TSD) ensures the internal drivers of IC are operating under a safe operating

temperature range.

All the protection mechanisms mentioned above combine to provide a complete protecting scenario in the motor

system and avoid any possible damages and guarantee under a correct and safe operation.

Block Diagram

Figure.1

Bias Generator

Open Drain

MOS Driver

Oscillator

Hall Plate

Reset

Power On

Digital Control Logic

(Event Timer)

Chopper Amplifier

Halogen Free