TC78B041FNG and TC78B042FTG are developed for three-phase

brushless DC fan motors.

The TC78B041FNG adopts SSOP30 type package.

The TC78B042FTG adopts QFN32 type package, adding RESX

and VREF2 pins

Features

• Sine-wave PWM control

• Automatic lead angle control (InPAC: Intelligent Phase

Control)

• Lead angle control with external input

• Hall sensor input/Hall IC input

• Forward rotation/Reverse rotation switch

• Number of pulses of rotation pulse signal output is selectable.

• Output current can be limited.

• Built-in regulator circuit (VREF= 5 V (typ.), 35 mA (max))

• Operating supply voltage range: VCC = 6 V to 16.5 V

• Built-in motor lock detection