Rainbow-electronics BA6950FS Manual de usuario descargar pdf (Pagina 1)

484

Motor driver ICs

Reversible motor driver

BA6950FS

The BA6950FS is a reversible-motor driver suited for brush motors. Two logic inputs allow four output modes: forward,

reverse, stop (standby), and brake. The rotational speed of motor can be set arbitrarily by changing the voltage applied

to the motor with control pins. The IC can also drive a motor at a constant speed by using a built-in current feedback

amplifier.

Applications

VCRs, audio equipment

Features

1) Two logic inputs allow four output modes: forward, re-

verse, stop (standby), and brake.

2) Motor speed variable with voltage control signals.

3) Built-in current feedback amplifier allows constant

motor speed.

4) Control gain can be set arbitrarily by using external

resistors.

5) Built-in thermal shutdown circuit.

Absolute maximum ratings (Ta = 25C)

Recommended operating conditions (Ta = 25C)

1 2 3 4 5 6

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Pagina 1 - Reversible motor driver

484Motor driver ICsReversible motor driverBA6950FSThe BA6950FS is a reversible-motor driver suited for brush motors. Two logic inputs allow four outpu

Pagina 2 - Motor driver ICs BA6950FS

485Motor driver ICs BA6950FSBlock diagramPin descriptions

Pagina 3

486Motor driver ICs BA6950FSInput/output circuit (resistances, in Ω, are typical values)(1) R and F inputs (pins 5 and 10)(2) CTL amplifier (pins 2 a

Pagina 4

487Motor driver ICs BA6950FSFElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 4.8V, VB = 4.8V)FCircuit operation(1) Input section

Pagina 5

488Motor driver ICs BA6950FSFApplication exampleFOperation notes(1) Thermal shutdown circuitThe thermal shutdown (TSD) circuit turns off all driverout

Pagina 6

489Motor driver ICs BA6950FSElectrical characteristic curvesExternal dimensions (Units: mm)

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