BA5937AFP

Optical disc ICs 4-channel BTL driver for CD players BA5937AFP The BA5937AFP is a 4-channel BTL driver developed for use with CD players. In addition to internal drivers for the focus coil, tracking coil, and sled motor, it also contains a driver for the loading motor. FApplications CD-ROM, CD players FFeatures 1) Perfect for compact applications with the use of the HSOP 28-pin power package. 2) Internal thermal shutdown circuit. 3) Gain is adjustable with externally connected resistor. (For channels 1, 3, and 4.) FAbsolute maximum ratings (Ta = 25_C) 4) External mute pin enables the muting of the output current for channels 1 and 4. 5) Power supply is divided into three systems (VCC1 = ch1 and ch4, VCC2 = ch2 and current source, VCC3 = ch3). FRecommended operating conditions (Ta = 25_C) 632 Optical disc ICs FBlock diagram BA5937AFP FPin descriptions 633 Optical disc ICs FInput / output circuits BA5937AFP 634 Optical disc ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, RL = 8Ω, VBIAS = 2.5V) BA5937AFP 635 Optical disc ICs FMeasurement circuit BA5937AFP 636 Optical disc ICs FApplication example BA5937AFP 637 Optical disc ICs FOperation notes (1) Output mode switch for loading motor driver (VCC = 8V) BA5937AFP Note: Loading driver gain is 0dB. 638 Optical disc ICs (2) Voltage setting for loading motor driver (ex: forward mode) BA5937AFP ∗When setting the output voltage from the loading driver, even if an output voltage is...