DC MOTOR DRIVE CIRCUIT

DESCRIPTION

UTC UMD9130 is an integrated DC motor drive solution for

applications such as 12V powered fan motor and stepper motor.

It has H bridge driver and uses the PMOS and NMOS power

transistors with low output resistance. The circuit has a wide

working voltage range (from 8V to 18V), the maximum continuous

output current reaches 0.5A, and the maximum peak output

current reaches 1.0A.

UTC UMD9130 has on-chip temperature protection function.

When the load current through the drive circuit is much greater

than the maximum continuous current of the circuit, limited by the

package heat dissipation capacity, the junction temperature of the

chip inside the circuit will rise rapidly. When the chip temperature

exceeds a maximum temperature point (typically 150°C) set by

internal temperature protection circuit, the internal circuit will

switch off the on-chip power switching transistor of UTC

UMD9130, and switch off load current, preventing potential safety

hazards such as fuming, igniting, etc. Of plastic package caused

by over temperature .Only after having confirmed that the circuit

has returned to safety temperature, can the on-chip temperature

hysteresis circuit be allowed to re-control the circuit.

FEATURES

* Low standby current

* Low static operational current

* Integrated H-bridge drive circuit

* Built-in anti-common-state conduction circuit

* Low-on-resistance power MOSFET

* Built-in thermal protection circuit (TSD) with hysteresis