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| Optical disc ICs 2-channel BTL driver for CD players BA6792FP / BA6792FP-Y The BA6792FP and BA6792FP-Y are 2-channel BTL drivers for CD player actuator drives. HSOP 28 and 25-pin packages allow for compact applications. FApplications CD players and CD-ROM drives FFeatures 1) 2 channel dedicated BTL drivers. 2) HSOP 28 and 25-pin power packages for compact applications. FAbsolute maximum ratings (Ta = 25_C) 3) Gain is adjustable with an attached resistor. 4) Internal thermal shutdown circuit. FRecommended operating conditions (Ta = 25_C) 202 Optical disc ICs FBlock diagram BA6792FP / BA6792FP-Y FPin descriptions (BA6792FP) 203 Optical disc ICs BA6792FP / BA6792FP-Y FPin descriptions (BA6792FP - Y) 204 Optical disc ICs FPin equivalent circuit diagrams BA6792FP / BA6792FP-Y FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1KHz, RL = 8) 205 Optical disc ICs FMeasurement circuit BA6792FP / BA6792FP-Y 206 Optical disc ICs FApplication example (BA6792FP) BA6792FP / BA6792FP-Y FOperation notes (1) The BA6792FP and BA6792FP-Y have an internal thermal shutdown circuit. The output current is muted when the chip temperature rises above 175_C (typically). The driver circuit is restored when the chip temperature rises above 150_C (typically). (2) The output current can be muted by opening the mute pin voltage or lowering it below 0.5V. This pin should be pulled up above 2.0V during normal operation. (3) Muting also occurs when the bias pin voltage drops below 1.4V (typically). This pin should stay above 2.0V during normal operation. (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 / 2). (5) Attach a bypass capacitor (roughly 0.1F) between the power supplies, at the base of the IC. (6) The radiating fin is connected to the package's internal GND, but should also be connected to an external ground. 207 Optical disc ICs FElectrical characteristic curves BA6792FP / BA6792FP-Y FExternal dimensions (Units: mm) 208 |
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