ML5954 _______________________________________________________________ ML5954 4-channel BTL driver for CD-ROM Driver & DVD Player Application Features CD-ROM Driver DVD player z Wide Dynamic Range (4.0V(Typ.) When VCC=12V, PVCC=5V and RL=8Ω) Level Shift Circuit on-chip Thermal Shutdown Circuit on-chip Internal Standby Mode. HSOP-28 package z z z z General Description The ML5954 is a four-channel BTL driver IC for driving the motors and actuators in products such as CD-ROM and DVD. Two channels use current feedback to minimize the current phase shift caused by the influence of load inductance. The IC is used in CD-ROM drivers and DVD players. 22 VOTK+ GND 23 VOTK- VINLD 24 VOLD+ CTKerr2 25 VOLD- CTKerr1 26 PGND VINTK 27 VNFTK BIAS 28 PVcc2 STBY Block Diagram 21 20 19 18 17 16 15 PVcc2 10kΩ 7.5kΩ + 20kΩ Standby 7.5kΩ 10kΩ - x2 + Thermal Shut Down - 15kΩ Loading Driver PVcc1 + Det Amp Actuator Driver PVcc2 + 7.5kΩ - Vcc Det Amp + x2 + 20kΩ - 7.5kΩ 10kΩ + 25kΩ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VINSL+ VINSL- VOSL VNFFC Vcc PVcc1 PGND VOSL- VOSL+ VOFC- VOFC+ PVcc1 PGND CFCerr2 Vcc CFCerr1 - Actuator Driver VINFC 10kΩ SLED Driver - BTL Driver for CD-ROM Drivers & DVD Player May, 2004 V1.0 1/6 ML5954 _______________________________________________________________ STBY BIAS VINTK CTKerr1 CTKerr2 VINLD GND PVcc2 VNFTK PGND VOLD- VOLD+ VOTK- VOTK+ Pin Configuration 28 27 26 25 24 23 22 21 20 19 18 17 16 15 11 12 13 14 VOFC+ 10 VOFC- VNFFC 9 VOSL+ VOSL 8 VOSL- 7 PGND 6 PVcc1 5 Vcc 4 VINSL- CFCerr1 3 VINSL+ 2 CFCerr2 1 VINFC ML5954 Pin Description Pin Pin Name Function Pin Pin Name Function Focus driver input 15 VOTK+ Tracking driver output (+) 16 VOTK- Tracking driver output (-) 17 VOLD+ Loading driver output (+) 1 VINFC 2 CFCerr1 3 CFCerr2 4 VINSL+ Op Amp input (+) for the sled driver 18 VOLD- Loading driver output (-) 5 VINSL- Op Amp input (-) for the sled driver 19 PGND Ground for actuator driver block 6 VOSL Op Amp output for the sled driver 20 VNFTK 7 VNFFC Focus driver feedback pin 21 PVCC2 Power supply voltage for actuator driver block 8 VCC Ground For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Supply voltage 22 GND 23 VINLD Tracking driver feedback pin 9 PVCC1 Power supply voltage for sled driver block 10 PGND Ground for sled driver block 24 CTKerr2 11 VOSL- Sled driver output (-) 25 CTKerr1 12 VOSL+ Sled driver output (+) 26 VINTK 13 VOFC- Focus driver output (-) 27 BIAS Bias input 14 VOFC+ Focus driver output (+) 28 STBY Standby control Loading driver input For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Tracking driver input Note 1: The indicated polarity for the output pins is defined under the inputs are (+) polarity. The output H bridge power supply pins are PVCC2 for the focus & tracking channel, PVCC1 for the loading channel, and VCC for the pre-block and sled channel. Always ensure that VCC ≤ PVCC1/2. BTL Driver for CD-ROM Drivers & DVD Player May, 2004 V1.0 2/6 ML5954 _______________________________________________________________ Absolute Maximum Ratings Parameter Symbol Ratings Units Supply Voltage VCC, PVCC1/2 13.5 V Power Dissipation Storage Temperature Pd 1.7 * Tstg 1 W o -55 ~ +150 C Note 1 : Power dissipation is reduced by 5mW for each increase in TA of 1°C over 25°C. Note 2 : Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended operating conditions Parameter Symbol Ratings Operating Temperature TOPR 0 ~ +70 VCC 4.3 ~ 13.2 V PVCC1 4.3 ~ VCC V PVCC2 4.3 ~ VCC V Supply Voltage BTL Driver for CD-ROM Drivers & DVD Player Units o C May, 2004 V1.0 3/6 ML5954 _______________________________________________________________ Electrical Characteristics (TA=25°C, VCC=12V, PVCC1=PVCC2=5V, VBIAS=2.5V, RL1=RL2=RL3=RL4=8Ω, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Units Quiescent Current ICC 18 27 mA Standby Current IST 0.5 mA Standby on Voltage VSTON All channel on 0.5 V Standby off Voltage VSTOFF All channel off 2.0 V Actuator driver Output Offset Current IOO -6 6 mA 3.6 4.0 V Maximum Output Amplitude VOM VIN= VBIAS ± 1.5V Transmission Gain gm 1.3 1.5 1.7 A/V VIN= VBIAS ± 0.2V Sled Motor Driver / Pre Op-Amp Common Input Voltage Range VICM -0.3 11.0 V Input Bias Current IIB 30 300 nA Output Low Level Voltage VOL No Load 0.8 1.1 V Output Source Current ISO 0.3 0.5 mA Output sink Current ISI ISI 1 mA Sled Motor Driver Output Offset voltage VOOFSL -100 0 100 mV Maximum Output Voltage VOMSL 7.5 9.0 V Closed-Loop Voltage Gain GVSL 18.0 20.0 22.0 dB VIN= VBIAS ± 0.2V Loading Motor Driver Output Offset Voltage VOOFLD -50 0 50 mV Maximum Output Voltage VOMLD 3.6 4.0 V Closed-Loop GVLD 13.5 15.5 17.5 dB VIN= VBIAS ± 0.2V Gain Error by Polarity ∆GVLD 0 1 2 dB VIN= VBIAS ± 0.2V BTL Driver for CD-ROM Drivers & DVD Player May, 2004 V1.0 4/6 ML5954 _______________________________________________________________ Application Circuit Micro-controller LOADING STANDBY VCENTER SLED FOCUS TRACKING DSP TRACKING COIL LOADING MOTOR Rd M 5V or 12V 28 27 26 25 24 23 22 21 20 19 18 17 16 15 8 9 10 11 12 13 14 ML5954 1 2 3 4 5 6 7 12V 5V or 12V M Rd SLED MOTOR FOCUS COIL Precautions for use (1) This IC has a built-in thermal shutdown circuit that mutes the output current when the chip temperature reached 175oC (Typ). The hysteresis is set to 25 oC (Typ.), so the driver circuits start up again when the chip temperature falls to 150 oC (Typ.). (2) The driver buffer is switched off when the supply voltage falls below 3.5V (Typ.), and is switched back on when the voltage reaches 3.7V (Typ.) again. (3) In case standby pin voltage under 1.4V or opened, quiescent current is muted. Standby pin voltage should be over 1.8V for normal application. (4) Insert the by-pass capacitor between VCC-pin and GND-pin of the IC as near as possible (approximately 0.1uF) (5) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the external GND. Supplement: (Current-feedback driver) The transmission gain (output current/input voltage) is given by : gm = 1 ( A /V ) ( Rd + RWIRE ) ,where RWIRE is the total gold wire resistance inside the package (0.15Ω ± 0.05Ω) (Typ.). BTL Driver for CD-ROM Drivers & DVD Player May, 2004 V1.0 5/6 ML5954 _______________________________________________________________ Mechanical Dimensions HSOP-28 Unit: mm (inch) The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. BTL Driver for CD-ROM Drivers & DVD Player May, 2004 V1.0 6/6