LB1913 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1913

FDD Spindle Motor Driver

SANYO -> Panasonic 

Continued from preceding page

Pin no. Pin

Pin voltage

2

ID

Low: 0.4 V max

High: 4.5 V min

3

CD

LB1913

Equivalent circuit

• Index output

Function

• Connection for external RC time constant circuit.

4

SS Low: 0.8 V max

High: 3.5 V min

5

SL

Low: 1.0 V max

High: 3.5 V min

6

CLK Low: 1.0 V max

High:

VCC–1.0 V min

7

GND

8

VCC

9

Rf

• Start/stop switching input

This is an active-low input.

• Speed switching input

• Reference clock input

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

speeds.

• Ground connection

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

• Power supply

Provide a well-stabilized power supply so that ripple

and noise do not enter the LB1913 from this pin.

• Used for output current detection.

The output current is converted to a voltage and

detected by connecting a resistor (Rf) between this

pin and VCC. The current limiter operates by

detecting the voltage on this pin.

Continued on next page

No. 5503-4/6

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