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| Optical disc ICs 4-channel BTL driver for CD players BA6196FP The BA6196FP is an IC designed CD players and has an internal 4-channel BTL driver, 5V regulator (attached PNP transistor required), standard operational amplifier and a thermal shutdown feature. The driver has gain adjustment input pins for each channel, allowing gain to be set to the desired value. Also, the internal level shift circuit helps reduce the number of attached components. FApplications CD players, CD-ROM drives and other optical disc devices FFeatures 1) 4-channel BTL driver in a 28-pin HSOP package, for miniaturization of applications. 2) Gain is adjustable with an attached resistor. 3) Internal thermal shutdown circuit. 4) Internal 5V regulator. (required attached PNP transistor) 5) Internal standard operational amplifier. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 288 Optical disc ICs FBlock diagram BA6196FP 289 Optical disc ICs FPin descriptions BA6196FP 290 Optical disc ICs FInput / output circuits BA6196FP 291 Optical disc ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, RL = 8) BA6196FP 292 Optical disc ICs FMeasurement circuit BA6196FP 293 Optical disc ICs FMeasurement circuit switch table BA6196FP FOperation notes (1) The BA6196FP has an internal shutdown circuit. The output current is muted when the chip temperature exceeds 175_C (typically). (2) If the mute pin (pin 7) voltage is opened or lowered below 0.5V, the output current will be muted. The mute pin should be pulled up above 2.0V during normal use. (3) The bias pin (pin 23) is muted when lowered below 1.4V (typically). Make sure it stays above 1.6V during normal use. (4) Muting occurs during thermal shutdown, mute-on operations or a drop in the bias pin voltage. In each case, only the drivers are muted. During muting, the output pins remain at the internal bias voltage, roughly (VCC-VF) / 2. (5) The internal circuits turn off when the supply voltage drops below 4.5V (typically), and turn on again when it rises above 4.7V (typically). (6) Be sure to connect the IC to a 0.1F bypass capacitor to the power supply, at the base of the IC. (7) The radiating fin is connected to the package's internal GND, but should also be connected to an external ground. (8) The capacitor between regulator output (pin 6) and GND also serves to prevent oscillation of the IC, so select one with good temperature characteristics. 294 Optical disc ICs FApplication example BA6196FP 295 Optical disc ICs FElectrical characteristic curves BA6196FP 296 Optical disc ICs FExternal dimensions (Units: mm) BA6196FP 297 |
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