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BA6297AFP Datasheet(PDF) 5 Page - Rohm

Part # BA6297AFP
Description  4-channel BTL driver for CD players
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BA6297AFP Datasheet(HTML) 5 Page - Rohm

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Optical disc ICs
FCircuit operation
The BA6297AFP comprises a 4-channel driver, internal
bias amplifier, mute pin and thermal shutdown.
The driver uses a buffer to output one of the outputs from
its preamplifier with no modification, and uses an inver-
sion 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. See Figs. 7 and 8 for exam-
Internal bias amplifier
Configured as shown in Fig. 9. The internal bias voltage
(Vref) is calculated thus :
Mute pin (pin 15)
The output current is muted when this pin receives the
low level or a high impedance. Set the pin voltage at high
during normal operation.
Thermal shutdown
The BA6297AFP has an internal thermal shutdown cir-
cuit. Output current is muted when the chip temperature
exceeds 175
_C (typically).

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