No. 5503-4/6

LB1913

Pin no.

Pin

Pin voltage

Equivalent circuit

Function

2

ID

Low: 0.4 V max

• Index output

High: 4.5 V min

3

CD

• Connection for external RC time constant circuit.

4

SS

Low: 0.8 V max

• Start/stop switching input

High: 3.5 V min

This is an active-low input.

5

SL

Low: 1.0 V max

• Speed switching input

High: 3.5 V min

6

CLK

Low: 1.0 V max

• Reference clock input

High:

Use a clock rate of 1 MHz for 300 and 360 rpm

speeds.

7

GND

• Ground connection

Connect this pin, pin 14, and the frame to ground.

8

• Power supply

Provide a well-stabilized power supply so that ripple

and noise do not enter the LB1913 from this pin.

9

Rf

• Used for output current detection.

The output current is converted to a voltage and

detected by connecting a resistor (Rf) between this

detecting the voltage on this pin.

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