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 = 25C) Recommended operating conditions (Ta = 25C) 494 3) Wide dynamic range (5 or 4V when VCC=8V) 4) Adaptable for low-voltage servos. Optical disc ICs BA6995FP Block diagram 495 Optical disc ICs Pin descriptions 496 BA6995FP Optical disc ICs BA6995FP Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 8V, RL = 8Ω) 497 Optical disc ICs Measurement circuit 498 BA6995FP 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 499 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 VCC. (2) Muting 〈Thermal shutdown〉 The output current is muted when the chip temperature exceeds 175C (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 500 (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 VCC / 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. Optical disc ICs BA6995FP External dimensions (Units: mm) 501