YOUDA INTEGRATED CIRCUIT YD5954 ACTUATOR DRIVER WITH CURRENT FEEDBACK FOR CD – ROM/DVD¡ª DESCRIPTION The YD5954 is a four-channel BTL driver IC for driving the motors and actuators in products such as CD-ROM/DVD drivers.
Two of the channels use current feedback to minimize the current phase shift caused by the influence of load inductance.
YD5954 FEATURES *Wide dynamic range(4.
0V(typ.
) when Vcc=12V, PVCC=5V, and RL=8¦¸ *Level shift circuit on chip.
*Thermal shutdown circuit on chip.
).
BLOCK DIAGRAM 28 27 26 10k STAND -BY THERMAL SHUT DOWN + 20k + 7.
5k X2 DET.
AMP 25 7.
5k 24 23 22 PreGND 10k 21 PVcc2 15K SLED DRIVER + ACTUATIO DRIVER PVcc1 PVcc2 7.
5k DET.
AMP X2 10k - + 7.
5k 10k 1 2 3 4 +...

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