SS30

No.A1878-5/7

Continued from preceding page.

Pin No.

Pin name

Function

Equivalent circuit

6

OSC

Motor startup frequency setting. A capacitor must

be connected between this pin and ground. The

startup frequency is adjusted by controlling the

charge/discharge current (

±2.5μA) and the

capacitance of the capacitor.

VCC

6

VCC

7

SGND

Ground for IC. It is short-circuited and uses it with

pin SUBGND (pin 19).

8

F/R

Motor rotation direction switching. A high-level input

causes current to flow into the motor in the order of

U, V, and W and a low-level input in the order of U,

W, and V. Changing the order of current application

turns the motor in the opposite direction.

VCC

8

Reverse signal

Forward signal

Forward/reverse

switching signal

9

1/2FG

FG pulse output. This pin outputs 1/2 Hall sensor

system equivalent pulse signal.

10

FG

FG pulse output. This pin outputs a Hall sensor

system equivalent pulse signal.

11

RD

Motor lock detection output pin.

When the motor is locked, "H" is output.

10

9

11

12

PWM

PWM signal input. A high-level input turns on the

output transistors. A low-level input turns off the

output transistors and motor stops. The motor

speed is set by controlling the duty cycle of the input

PWM signal. The motor runs at full speed when this

pin is held open.

VCC

12

13

VG

Charge pump step-up output. A capacitor must be

connected between this pin and ground.

14

CP

Charge pump step-up pulse output pin. A capacitor

must be connected between this pin and the CPC

pin (pin 15).

15

CPC

Charge pump step-up pin. A capacitor must be

connected between this pin and the CP pin (pin 14).

VCC

14

15

13

19

SUBGND

SUBGND pin for IC. It is short-circuited and uses it

with pin SGND (pin 7).