BA6397FP BA6397FP 4-channel driver player motors actuators. regul

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BA6397FP BA6397FP 4-channel driver player motors actuators. regul

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4-channel driver players
BA6397FP
BA6397FP 4-channel driver player motors actuators. regulator internal standard operational amplifier make this suited broad range applications.
FApplications players CD-ROM drives
FFeatures HSOP 28-pin package allows miniaturization applications. number external components. Driver gain adjustable with single attached resistor. FAbsolute maximum ratings 25_C)
Internal regulator. (requires attached transistor) Internal standard operational amplifier. Internal thermal shutdown circuit.
FRecommended operating conditions 25_C)
BA6397FP
FBlock diagram
FPin descriptions
BA6397FP
FInput output circuits
BA6397FP
FElectrical characteristics (unless otherwise noted, 25_C, 1kHz,
BA6397FP
FCircuit operation Driver Inputs focus tracking error signal from servo preamplifier control signal from motor. 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 type transistor must connected.
BA6397FP
Operational amplifier standard 4558 type. FApplication example
FOperation notes BA6397FP internal thermal shutdown circuit. Output current muted when chip temperature exceeds 175_C (typically). mute (pin voltage opened lowered below 0.5V, output current will muted. should pulled above 2.0V during normal use. bias (pin 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. each case, only drivers muted. During muting, output pins remain internal bias voltage, roughly (VCC-VF)
BA6397FP
internal input resistor positive temperature coefficient roughly 2000ppm degree, when changing gain using attached resistor, gain will also change rate roughly 2000ppm degree. There virtually gain variation temperature when using internal input resistor. sure connect 0.1µF bypass capacitor power supply, base radiating connected package's internal GND, should also connected external ground. capacitor between regulator output (pin also serves prevent oscillation select with good temperature characteristics.
FElectrical characteristic curves
FElectrical characteristic curves
BA6397FP
FExternal dimensions (Units:

BA6397FP BA6397FP 4-channel driver player motors actuators. regul

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