UNI SONI C TECHNOLOGI ES CO., LTD

UMD9115

Preliminary

CMOS IC

www.unisonic.com.tw

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Copyright © 2019 Unisonic Technologies Co., Ltd

BRU SH DC M OT OR DRI V E

CI RCU I T

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DESCRI PT I ON

UTC UMD9115 is an integrated brush DC motor drive solution

for battery-powered toys or battery-powered motion control

applications. It has H bridge driver and uses the PMOS and NMOS

power transistors with low output resistance. Low on-resistance

ensures the circuit to consume lower power in operating at a

continuous current, and ensures the circuit to operate stably for a

long time. The circuit has a wide working voltage range, and an

output power section is able to supply an output current of up to

200mA (typical) according to the logic control.

The IC allows control of reversible motors in cassette players

and other electrical equipment by using CMOS-level logic signals.

UTC UMD9115 has on-chip temperature protection function.

When load motor with low internal resistance is in locked rotor,

UTC UMD9115 output current will increase momentarily, power

dissipation of the circuit will go up sharply, and the chip

temperature will soar. But, when the chip temperature exceeds a

maximum temperature point set by internal temperature protection

circuit, the internal circuit will switch off the on-chip power switching

transistor of UTC UMD9115, 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.

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FEAT U RES

* H bridge driver of internal PMOS/NMOS power switches

* Built-in motor driving power transistors (typ.200mA)

* Built-in anti-common state conduction circuit.

* Direct control with the CMOS logic

* Low standby current (typ.0.1uA)

* Low static operational current

* On-chip thermal shut down (TSD) with hysteresis

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