Datasheet BA6995FP Datasheet (ROHM)

Optical disc ICs

5-channel BTL driver for CD players

BA6995FP

The BA6995FP is 5-channel BTL driver for CD and MD player actuators and spindle, thread and loading motors. The
spindle driver and loading driver share a single buffer, and either can be driven via the control pin.

Applications
CD, MD players and other optical disc applications

Features

1) 28-pin HSOP package allows for miniaturization of
applications.

2) Gain is adjustable with a single attached resistor.

Absolute maximum ratings (Ta = 25C)

3) Wide dynamic range (5 or 4V when V

4) Adaptable for low-voltage servos.

CC=8V)

Recommended operating conditions (Ta = 25C)

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Optical disc ICs BA6995FP

Block diagram

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Optical disc ICs BA6995FP

Pin descriptions

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Optical disc ICs BA6995FP

Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 8V, RL = 8Ω)

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Optical disc ICs BA6995FP

Measurement circuit

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Optical disc ICs BA6995FP

Function description
CTL1 and CTL2

Forward and reverse (enabled only when channel 5 control and channel 5 are ON)

Application example

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Optical disc ICs BA6995FP

Operation notes
(1) Tray motor driver voltage setting (forward mode)

Note: Tray driver output voltage cannot be set higher than the maximum output voltage for the power supply. The example above applies only when setting
below the maximum output voltage. Maximum output voltage for the power supply can be output by pulling up the tray input pin (pin 8), or by connecting it to V

CC.

(2) Muting
〈Thermal shutdown〉
The output current is muted when the chip temperature
exceeds 175C (typically).
〈Supply voltage drop muting〉
The internal circuits turn off when the supply voltage
drops below 4.3V (typically), and turn on again when it
rises above 4.5V (typically).

Electrical characteristic curves

(3) Muting occurs during thermal shutdown and when
the supply voltage drops. In either case, only the driver
is muted. The output pin voltage during muting is the in­ternal bias voltage, roughly V

CC /2.

(4) Be sure to connect the IC to a 0.1µF bypass capaci­tor to the power supply, at the base of the IC.
(5) Connect the radiating fin to an external ground.

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Optical disc ICs BA6995FP

External dimensions (Units: mm)

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