TC78B015AFTG TOSHIBA CMOS Integrated Circuit Silicon Monolithic TC78B015AFTG 3-phase Driver for Brushless DC Motors The TC78B015AFTG is for three-phase full-wave brushless DC motor with 150-degree trapezoid PWM chopper system. They control motor rotational speed by changing the PWM duty, based on the speed control input. Hall signal is supported to one sensor for the TC78B015AFTG. P-WQFN36-0505-0.50-001 Features Weight: 0.06 g (typ.) Three-phase full wave drive 150-degree trapezoid PWM chopper system Soft switching Hall amplifier (hall element / hall IC): 1-sensor drive Power supply: absolute maximum voltage: 36 V Output current: absolute maximum current: 3 A Selectable rotational speed command input signal: Pulse duty signal input/analog voltage input/PWM signal input Selectable PWM frequency Adjustable minimum duty in PWM control Adjustable speed ratio in PWM control Selectable lead angle control function: Auto lead angle function/External lead angle control (32 steps correspond to 0 to 58) Selectable rotation direction Brake function terminal Selectable lock detection function Restart function Rotation frequency signal (FG OUT): 1 pulse/ electrical angle 360, 2/3 pulse/ electrical angle 360, 1/2 pulse/ electrical angle 360, 1/3 pulse/ electrical angle 360 Lock detection signal (LD OUT) Power supply voltage monitoring function Overcurrent detection circuit (ISD) Thermal shutdown circuit (TSD) Under voltage lockout circuit (UVLO) Current limit circuit Adjustable start conditions Selectable control function of forced commutation frequency (1-sensor drive). 1 2017-02-01 2017 TOSHIBA Corporation TC78B015AFTG Pin assignment <Top view> 27 26 25 24 23 22 21 20 19 TIP LD OUT 28 18 TEST TEST2 29 17 SEL LA MVM 30 16 MIN SP VM 31 15 E-PAD SEL SP VM 32 14 PGND3 FPWM 33 13 LA SEL LD 34 12 TSP/VSP BRAKE 35 11 CW/CCW SEL FG 36 10 1 2 3 4 5 6 7 8 9 Note 1: Design the pattern in consideration of the heat design because the back side (E-PAD) has the role of heat radiation. The back side (E-PAD) should be connected to GND because it is connected to the back of the chip electrically. Note 2: There are four pairs of terminals named U, V, W, and VM. Connect two each of the terminals which has the same pin symbol via external patterns. Regarding GND, connect PGND1, PGND2, PGND3, and SGND via external patterns. PGND1 and PGND2 are short-circuited in the IC. 2 2017-02-01 TSTEP U ILIM U PGND1 SGND V OSCCR V VREG PGND2 HUP W HUM W VST FG OUT FST