TC78H600FNG/FTG
2012-09-05
3
Pin Functions
Pin No.
TC78H
600
FNG
TC78H
600
FTG
Pin name Functional description Remarks
1 4, 5 Vcc Power supply pin for logic block Vcc(opr)=2.7 to 5.5V
2 6 STBY Standby input Refer to “Input/Output functions”.
3 7 OSC
Connection pin for an external capacitor used
for internal oscillation
4 8 IN2B Control input pin for Bch (2) Refer to “Input/Output functions”.
5 9 IN1B Control input pin for Bch (1) Refer to “Input/Output functions”.
6 10, 11 VM Power supply pin for output VM
(opr)
= 2.5 to 15.0 V
7 12 PWMB PWM signal input pin for Bch Refer to “Input/Output functions”.
8 13 BO2 Output pin of B phase (2) Connect BO2 to a motor coil pin.
9 14 RSGNDB
Connection pin for a B-phase output current
detection resistor
Refer to “Select Direct PWM or Constant current
PWM”.
10 15 BO1 Output pin of B phase (1) Connect BO1 to a motor coil pin.
11 16 AO2 Output pin of A phase (2) Connect AO2 to a motor coil pin.
12 17 RSGNDA
Connection pin for an A-phase output current
detection resistor
Refer to “Select Direct PWM or Constant current
PWM”.
13 18 AO1 Output pin of A phase (1) Connect AO1 to a motor coil pin.
14 19 SELECT Constant PWM, Direct PWM select pin
15 20, 21 GND Ground pin
16 22 ALERT Monitor signal pin for TSD and ISD (output) Open drain, Pulled up by an external resistor
17 23 PWMA PWM signal input pin for Ach Refer to “Input/Output functions”.
18 1 Vref
External set terminal for A-phase and
B-phase reference voltage
Refer to “Select Direct PWM or Constant current
PWM”.
19 2 IN2A Control input pin for Ach (2) Refer to “Input/Output functions”.
20 3 IN1A Control input pin for Ach (1) Refer to “Input/Output functions”.
TC78H600FTG: Pin No. 24 of QFN24: N.C.
<Pin circuit>
Input pin
(IN1A, IN1B, IN1B, IN2B,
PWMA, PWMB, SELSCT, and
STBY)
Output pin
(ALERT)
Vcc
200kΩ
100 Ω
