LB1890M 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1890M

FDD Spindle Motor Driver

SANYO -> Panasonic 

Pin Description

Pin No. Symbol

5 W–

6 W+

7 V–

8 V+

9

U–

10 U+

Pin voltage

2.2V min

VCC –0.7V max

11 HB

1.5V typ

(IH = 5mA)

LB1890M

Unit (resistance: Ω)

Equivalent circuit

Pin description

• W-phase hall-effect input pin.

W+ > W– is established when logic is at an “H”

level.

• V-phase hall-effect input pin.

V+ > V– is established when logic is at an

“H” level.

• U-phase hall-effect input pin.

U+ > U– is established when logic is at an

“H” level.

• Minus pin for hall-effect bias.

When stopped, switches open and hall-

effect bias severs.

12 FC

13 I+

14 I–

1.5V min

VCC –0.5V max

15 SL

“L”: 0.8V max

“H”: 2.0V min

17 X1

• Frequency characteristics revision pin

By installing a capacitor between this pin

and GND, close-loop oscillation for the

current control system halts.

• Index input pin.

When the I+ pin is at an “L” level, I1 operates

with the fixed current of I1 = 10 µA and when

at an “H” level, I1 does not flow.

Hysteresis width is determined by the

resistor attached externally to the I+ pin.

• Time changeover pin.

1 : 1.2

“L” level : “H” level

• Reference clock generating pin.

18 X2

19 GND

• Ground pin.

Grounded as with pins 1 and 36.

Continued on next page.

No. 4354-4/8

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