BA6996

Optical disc ICs 5-channel BTL driver for CD and MD Players BA6996FP The BA6996FP, an IC designed for CD and MD players, has a 5-channel BTL power driver and a standard operational amplifier. The spindle and tray driver share a single output buffer, and are specified with a control pin. In addition, the internal level shift circuit reduces the number of attached components. FApplications CD players, CD-ROM drives, MD players and other optical disc devices FFeatures 1) A 5-channel BTL driver in a HSOP 28-pin package, allowing for application miniaturization. 2) Five drivers are turned on and off according to the combination of control pin logic. 3) The tray driver operates even when the servo power supply drops. FAbsolute maximum ratings (Ta = 25_C) 4) 5) 6) 7) Internal thermal shutdown circuit. Gain is adjustable with an attached resistor. Internal standard operational amplifier. Supports low-voltage servos. FRecommended operating conditions (Ta = 25_C) 502 Optical disc ICs FBlock diagram BA6996FP 503 Optical disc ICs FPin descriptions BA6996FP 504 Optical disc ICs FInput / output circuits BA6996FP 505 Optical disc ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, RL = 8Ω) BA6996FP 506 Optical disc ICs FMeasurement circuit BA6996FP 507 Optical disc ICs FApplication example BA6996FP 508 Optical disc ICs FOperation notes (1) Setting the tray motor driver voltage (forward mode) BA6996FP (2) Mute functions (3) Muting occurs during thermal shutdown and when the supply voltage or bias pin voltage drops. In each case, only the driver is muted. The output pin voltage during muting is the internal bias voltage, roughly VCC–VF / 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. %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). 509 Optical disc ICs FElectrical characteristic curves BA6996FP 510 Optical disc ICs FExternal dimensions (Units: mm) BA6996FP 511 Optical disc ICs MEMO 512