LB1890M Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Lista de partido

LB1890M

FDD Spindle Motor Driver

SANYO -> Panasonic 

Continued from preceding page.

Pin No. Symbol

Pin voltage

29 DO

30 IAI

31 IAO

32 VID

33 VCC

34 Rf

35 UOUT

LB1890M

Unit (resistance: Ω)

Equivalent circuit

Pin description

• Speed discriminator output pin.

• Integrated amplifier input pin.

• Integrated amplifier output pin.

• Index pulse output and index delay pulse

output power supply pin.

For applications when VCC equals 5 V,

VCC = VID = 5 V.

• Total power supply voltage pin except for

VID.

Voltage must be stable and free of ripple

and noise interference.

• Output current detection pin.

By installing an Rf resistor between this

pin and VCC, output current is detected as

voltage. Voltage detection at this pin

activates the current limiter.

• U-phase output pin.

36 Pow GND

1 Sub GND

2

VOUT

3

WOUT

4 AGC

• Output transistor ground pin.

• Ground pin.

Grounded as with pins 19 and 36.

• V-phase output pin.

• W-phase output pin.

• AGC pin.

Controls hall-effect amplifier gain in

response to hall-effect input frequency.

No. 4354-6/8

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