FD0259f

Smart motor driver with embedded Hall sensor

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No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.

Rev1.3 Aug. 12, 2009

P.1

FEELING

TECHNOLOGY

Bias Generator

H-Bridge

MOS Driver

Oscillator

Hall Plate

Reset

Power On

Digital Control Logic

(Event Timer)

Chopper Amplifier

PWM Control

Features

Motor driver with high sensitivity Hall-effect sensor

H-Bridge MOS driver

Lock-shutdown protection & auto-restart function

Built-in tachometer signal output (FG)

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

Thermal shutdown protection (TSD)

PWM mode variable speed control

Available in TS826 package

For 5V DC motor / FAN systems

General Description

FD0259f is a single-phase full-wave motor driver with embedded Hall-effect sensor. It integrates a H-bridge MOS

driver, a high sensitivity Hall-effect sensor, an event timer for locked rotor detection, and the variable speed control

function with the tachometer or alarm signal output logic into the ultra-small TS826 package, which make the

motors’ PCB (printed circuit board) design easier and the fabrication of small-size DC motors or FANs as simple as

possible.

The external system could read the motor’s speed of rotation from FG signal of FD0259f.

For safety, Lock-shutdown function turns the IC’s internal driver off to avoid over-heating when the rotor is locked,

and the IC will try to re-start the motor after the shutdown interval.

Thermal-shutdown protection (TSD) ensures the internal driver of IC is operating under the 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

Halogen Free