BA6295AFP

Optical disc ICs 2-channel BTL driver for CD players BA6295AFP The BA6295AFP is a 2-channel BTL driver for CD player actuators and motors. This IC delivers a large output current and is ideal for car CD players. FApplications CD players FFeatures 1) 2-channel BTL driver. 2) High output current. (Io = IA Typ.) 3) HSOP 28-pin package allows for miniaturization of applications. FAbsolute maximum ratings (Ta = 25_C) 4) Internal thermal shutdown. 5) Gain is adjustable by inserting a resistor between pins 27 and 28 ; pins 18 and 16. FRecommended operating conditions (Ta = 25_C) 197 Optical disc ICs FBlock diagram BA6295AFP FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 10V, f = 1kHz) 198 Optical disc ICs FElectrical characteristic curves BA6295AFP FMeasurement circuit 199 Optical disc ICs FCircuit operation The BA6295AFP comprises a 2-channel driver, internal bias amplifier, mute pin, and thermal shutdown circuit. (1) Driver The input resistance of the driver is the focus tracking error signal from the servo preamplifier and the control signal from the motor. The input signals normally center on 2.5V, and are converted to a VCC / 2-centered signal by the internal level shift amplifier. BA6295AFP Both positive and negative phases are created during final V / I conversion, generating BTL output via the driver buffer. Because the gain adjustment pins (pins 15, 16, 27 and 28) are external, gain can be adjusted by connecting a resistor in parallel. ...