YD5954 YOUDA INTEGRATED CIRCUIT ACTUATOR DRIVER WITH CURRENT FEEDBACK FOR CD – ROM/DVD—YD5954 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. FEATURES *Wide dynamic range(4.0V(typ.) when Vcc=12V, PVCC=5V, and RL=8Ω). *Level shift circuit on chip. *Thermal shutdown circuit on chip. BLOCK DIAGRAM 27 26 10k + - STAND -BY THERMAL SHUT DOWN 25 24 23 22 21 PVcc2 PreGND 7.5k 10k 20k 7.5k + - 20 19 18 17 16 15 PGND 15K X2 SLED DRIVER + - 28 DET.AMP ACTUATIO DRIVER PVcc1 PVcc2 YD5954 DET.AMP X2 + + - 7.5k 10k 20k - + 7.5k Vcc 2 LOADING DRIVER ACTUATIO DRIVER 11 13 - + 10k 1 25k Vcc 3 4 5 6 7 8 PVcc1 PGND 9 10 12 14 WuXi YouDa Electronics Co., Ltd Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China Tel: 86-510-5205117 86-510-5205108 Fax: 86-510-5205110 Website: www.e-youda.com SHENZHEN OFFICE Tel： 86-755-83740369 13823533350 Fax： 86-755-83741418 Ver 3.1 1 of 4 2004-9-20 YD5954 YOUDA INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Tamb=25℃) PARAMETER SYMBOL VALUE UNIT Power Supply Voltage VCC, PVCC1/2 13.5 V Power Dissipation PD 1.7 W Operating Temperature Topr -34 to +85 ℃ Storage Temperature Tstg -55 to +150 ℃ ELECTRICAL CHARACTERISTICS (Unless other specified, Tamb=25℃, Vcc=12V, Pvcc1=Pvcc2=5V, BIAS=2.5V, RL=8., Rd=0.5, C= 100pF) PARAMETER SYMBOL Quiescent Current Icc TEST CONDITIONS MIN TYP MAX UNIT 18 27 mA 6 mA Actuator Driver Output Offset Current IOOF -6 Maximum Output Amplitude VOM 3.6 4.0 Transmission Gain GM 1.3 1.5 VIN=BIAS ±0.2V V 1.7 A/V 11.0 V 300 nA Loading Driver Input op-amp Same Phase Input Range VICM Input Bias Current (outflow current) IBOP Output High Level Voltage VOHOP No load Output Low Level Voltage VOLOP No load Output Offset Voltage VOOFLD Maximum Output Amplitude VOMLD Closed-circuit Voltage Gain GVLD -0.3 30 VIN=BIAS ±0.2V 10.8 11.1 V 0.8 1.1 V -100 0 100 mV 7.5 9.0 18.0 20.0 22.0 dB -50 0 50 mV V Sled Driver Offset Voltage VOOFSL WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com YD5954 YOUDA INTEGRATED CIRCUIT Maximum Output Amplitude VOMSL Voltage Gain GVSL F/R Gain Differential 3.6 4.0 V VIN=BIAS ±0.2V 13.5 15.5 17.5 dB ∆GVSL VIN=BIAS ±0.2V 0 1 2 dB STBY On Voltage VSTBY1 All Channels Off 0 0.5 V STBY Off Voltage VSTBY2 All Channels On 2.0 STBY Logic V STAND-BY LOADING VCENTER TRACKING SLED FOCUS APPLICATION CIRCUIT DSP μ-COM TRACKING COIL SLED MOTOR 5V or 12V 28 27 26 25 24 23 22 Rd M 21 20 19 18 17 16 15 8 9 10 11 12 13 14 YD5954 1 2 3 4 5 6 7 12V 5V or 12V LOADING MOTOR Rd M FOCUS COIL WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com YD5954 YOUDA INTEGRATED CIRCUIT OUTLINE DRAWING WuXi YouDa Electronics Co., Ltd 4 of 4 Website: www.e-youda.com