LB1928(1999) データシートの表示（PDF） - SANYO -> Panasonic

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LB1928
(Rev.:1999)

Three-Phase Brushless Motor Driver for Office Automation Equipment

SANYO -> Panasonic 

LB1928

Pin Description

Pin number Pin name

Equivalent circuit

28

OUT1

1

OUT2

2

OUT3

VCC

300Ω

VM 5

3

GND2

5

VM

1 2 28

Pin function

Motor drive output pins.

Connect a Schottky diode between these

outputs and VCC.

Output ground pin.

Output block power supply and output

current detection pin.

Connect a resistor (Rf) between this pin and

VCC to detect the output current as a voltage.

The output current is limited according to the

3

A12983

equation IOUT = VRF/Rf.

4

VCC

6

VREG

VCC

6

Power supply pin (except for output block)

Regulated power supply output pin (5V

output)

Connect a capacitor (approx. 0.1 µF) between

this pin and ground to stabilize the output.

7

PWM

VREG

8

CSD

VREG

9

XI

10

XO

VREG

A12984

200Ω

2kΩ

7

A12985

300Ω

8

1kΩ

A12986

10

9

A12987

PWM frequency setting pin.

Connect a capacitor between this pin and

ground.

C = 3900 pF results in a frequency of about

18 kHz.

Lock protection circuit operation time

setting pin.

Connecting a capacitor of about 10 µF

between this pin and ground results in a

protection circuit operation time of about 3.3

seconds.

Quartz oscillator pins.

Connect to quartz oscillator to generate the

reference clock.

When an external clock (of several MHz) is

used, the clock signal should be input via a

resistor of about 5.1 kΩ connected in series

with the XI pin. In this case, the XO pin must

be left open.

Continued on next page

No. 6198-6/11

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