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.
