8958 Ver la hoja de datos (PDF) - Allegro MicroSystems

Número de pieza

componentes Descripción

Fabricante

8958

VOICE COIL MOTOR DRIVER

Allegro MicroSystems 

8958

VOICE COIL

MOTOR DRIVER

Term.

1

2

3&4

5

6&7

8

9

10

11

12

13

14

15

16

17

18 & 19

20

21

22

23

24

Terminal Name

LOGIC SUPPLY

INHIBIT

UV1 and UV2

LIMIT

GROUNDAB

PARK VOLTAGE

SENSEIN–

INA+

INA–

OUTA

OUTB

LOAD SUPPLY

INB–

INB+

SENSEIN+

GROUNDAB

PWR OK

GROUND

PARK

PARK DRIVE

SENSEOUT

TERMINAL FUNCTIONS

Function

VCC; logic supply voltage.

An active-high logic input that inhibits the output stages without initiating a park.

Under-voltage detection inputs. If not used, these terminals must be connected

to the logic supply (VCC).

A tri-state input that forces the output of amplifier A into saturation in either direction,

or allows normal linear operation.

Power amplifiers’ ground and thermal heat sink.

Auxiliary inverting input to power amplifier A.

Inverting input to current sense error amplifer.

Non-inverting input to power amplifier A.

Inverting input to power amplifier A.

Power amplifier A output to voice coil motor.

Power amplifier B output to voice coil motor.

VBB; load supply voltage.

Inverting input to power amplifier B.

Non-inverting input to power amplifier B.

Non-inverting input to current sense error amplifer.

Power amplifiers’ ground and thermal heat sink.

A logic low at this output indicates an under-voltage condition.

Circuit reference.

An active-high logic input that activates the park function.

Power transistor for retract current control on power down or park command.

Output of current sense error amplifier.

www.allegromicro.com

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