BA6897S BA6897FP BA6897S BA6897FP 4-channel driver player motors

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BA6897S BA6897FP BA6897S BA6897FP 4-channel driver player motors

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4-channel driver players
BA6897S BA6897FP
BA6897S BA6897FP 4-channel driver player motors actuators. internal regulator standard operational amplifier, suited wide range applications. FApplications players, CD-ROM drives FFeatures Minimal number external components. Driver gain adjustable with just attached resistor. Internal regulator (attached transistor necessary).
Internal standard operational amplifier. Internal thermal shutdown circuit.
FAbsolute maximum ratings 25_C)
FRecommended operating conditions 25_C)
FBlock diagram
BA6897S/BA6897FP
FPin descriptions BA6897S
BA6897S/BA6897FP
BA6897FP
BA6897S/BA6897FP
FInput output circuits
BA6897S/BA6897FP
BA6897S/BA6897FP
FElectrical characteristics (unless otherwise noted, 25_C, 1kHz,
FMeasruement circuit (BA6897S)
BA6897S/BA6897FP
FCircuit operation Driver Inputs focus tracking error signal from servo preamplifier control signal from motor.
BA6897S/BA6897FP
input signals, which normally center 2.5V, converted preamplifier, generating current corresponding input voltage. This current passed through resistor into internal reference voltage component, preamplifier output being signal centering internal reference voltage. systems (positive phase negative phase) created during conversion, generating output driver buffer.
Regulator This typical series regulator that generates reference voltage internally. saturation transistor must connected.
Amplifier General 4558 type.
FApplication examples
BA6897S/BA6897FP
BA6897S/BA6897FP
FOperation notes BA6897S BA6897FP have internal thermal shutdown circuit. Output current muted when chip temperature exceeds 175_C (typically). mute voltage opened lowered below 0.5V, output current will muted. mute should pulled above 2.0V during normal use. bias muted when lowered below 1.4V (typically). Make sure stays above 1.6V during normal use. Muting occurs during thermal shutdown, mute-on operations drop bias voltage supply volt-
BA6897S/BA6897FP
age. each case, only drivers muted. During muting, output pins remain internal bias voltage, roughly (VCC-VF) sure connect 0.1µF bypass capacitor power supply, base radiating connected packages internal GND, should also connected external ground. capacitor between regulator output (pin also serves prevent oscillation select with good temperature characteristics.
FElectrical characteristic curves
BA6897S/BA6897FP
FExternal dimensions (Units:

BA6897S BA6897FP BA6897S BA6897FP 4-channel driver player motors

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