Optical disc ICs
4-channel BTL driver for CD players
BA6297AFP
The BA6297AFP is a 4-channel BTL driver for CD player actuators and motors. The preamplifier has both positive and negative input pins and output pins, making this IC suited to a broad range of applications.
FApplications CD players
FFeatures 1) 4-channel BTL driver. 2) HSOP 28-pin package allows for miniaturization of applications. 3) Internal thermal shutdown.
4) Driver gain is adjustable with a single attached resistor. 5) Bot.
4-channel BTL driver for CD players
Optical disc ICs
4-channel BTL driver for CD players
BA6297AFP
The BA6297AFP is a 4-channel BTL driver for CD player actuators and motors. The preamplifier has both positive and negative input pins and output pins, making this IC suited to a broad range of applications.
FApplications CD players
FFeatures 1) 4-channel BTL driver. 2) HSOP 28-pin package allows for miniaturization of applications. 3) Internal thermal shutdown.
4) Driver gain is adjustable with a single attached resistor. 5) Both positive and negative input pins, for adaptability for a wide range of inputs (including negative phase input).
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
318
Optical disc ICs
FBlock diagram
BA6297AFP
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, RL = 8Ω)
319
Optical disc ICs
FElectrical characteristic curves
BA6297AFP
320
Optical disc ICs
FMeasurement circuit
BA6297AFP
321
Optical disc ICs
FCircuit operation The BA6297AFP comprises a 4-channel driver, internal bias amplifier, mute pin and thermal shutdown. (1) Driver The driver uses a buffer to output one of the outputs from its preamplifier with no modification, and uses an inversion amplifier to invert the other output before sending it to the driver buffer. The inversion amplifier’s reference is the bias voltage generated internally (pin 7 voltage), and so the preamplifier output must make the zero level equal to the internal bias voltage.