LB1895 查看數據表（PDF） - SANYO -> Panasonic

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LB1895

3-Phase Brushless Motor Driver for CD-ROM Spindle Motors

SANYO -> Panasonic 

Continued from preceding page.

Pin No. Symbol

Voltage

19 (20) S/S

0 V to VCC1

20 (21)

SIG

GND

22 (25) FC

23 (26) VCREF 2 V to 3 V

24 (27) VC

0 V toVCC1

25 (29)

27 (30)

1

2

WOUT

PWR

GND

VOUT

UOUT

7 (6) RF

LB1895, 1895D

Equivalent circuit

75kΩ

19

(20)

50kΩ

VCC1

A06721

22

(25)

24

200Ω

(27)

VCC1

2kΩ

20kΩ 5kΩ

A06722

VCC1

23

200Ω

(26)

100µA

100µA

A06723

VCC2

7 (6)

25 1 2

(29)

27

(30)

A06724

Description

None of the circuits operate if the

voltage on this pin is 0.7 V or less,

or if this pin is open.

When driving the motor, the

voltage on this pin must be 2 V or

more.

Ground connection for all circuits

except the outputs.

Control loop frequency

characteristics compensation pin.

Connect a capacitor between this

pin and GND to stop closed loop

oscillation in the current control

system.

Control reference voltage

application pin. This voltage

determines the control start

voltage.

Speed control voltage application

pin. V-type control, where:

VC > VCREF = forward and

VC < VCREF = reverse

W-phase output pin.

Output transistor ground.

V-phase output pin.

U-phase output pin.

Upper output NPN transistor

collector pin (three-phase

common). Connect a resistor

between VCC3 and the RF pin for

current detection. When this

voltage is detected, the constant

current control and current limiter

circuits function.

No.5634-8/12

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