BA5995FM Optical disc ICs BTL driver for CD/CD-ROM BA5995FM The BA5995FM is 4-channel BTL driver IC for driving actuator and motor of CD-ROM. Power package of HSOP-M28 pin enables to make set smaller. This IC is available for low voltage DSP. !Applications CD-ROM, others !Features 1) Wide dynamic range. (4V (typ.) at PreVCC=12V, PowVCC=5V, RL=8Ω) 2) Thermal shut down circuit built in. 3) Separating VCC into Pre and Power (Power divides into CH1, 2 and CH3/4), can make better power efficiency, by low supply voltage drive. 4) Stand by operated individually CH2 and CH1/3/4. 5) Built-in mute(CH1) circuit. 6) Suitable for low operation voltage DSP by wide D-range pre opamp. !Absolute maximum ratings (Ta=25°C) Parameter Power supply voltage Symbol Limits Unit PreVcc, PowVcc 13.5 V ∗1 Power dissipation Pd Max output current IoMax 1 Operating temperature range Topr −35 to +85 ˚C Storage temperature range Tstg −55 to +150 ˚C 2.2 ∗2 W A ∗1 On less than 3% (percentage occupied by copper foil), 70mm×70mm, t=1.6mm, glass epoxy mounting. Reduce power by 17.6mW for each degree above 25˚C. ∗2 The output current must not exceed the maximum Pd and ASO. !Recommended operating conditions Parameter Symbol Limits Unit Vcc for pre block PreVcc 4.5 to 13.2V V Vcc for power block PowVcc 4.5 to PreVcc V 1/8 BA5995FM Optical disc ICs !Block diagram 26 25 24 23 22 21 20 19 18 10k 10k + − LEVEL SHIFT + − 10k 20k LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT 20k 10k 10k 10k − + − + 10k ch4 10k 10k 10k 15 + − 20k 20k 16 10k 10k ch3 + − STAND BY PowVCC ch1 / 3 / 4 (ch3 / 4) + − + − PreVCC 17 + − 27 + − 28 10k 10k 10k + − PowVCC (ch2) 10k 1 2 3 4 5 6 7 8 9 10 11 ch2 10k 10k 12 + − PowVCC (ch1) + − STBY ch2 + − MUTE ch1 + − 10k ch1 13 10k 14 Resistor unit : [Ω] !Pin descriptions Pin No. Function Pin name Pin No. Pin name Function 1 BIAS IN Input for bias-amplifier 15 VO4 (+) Non inverted output of CH4 2 OPIN1 (+) Non inverting input for CH1 OP-AMP 16 VO4 (−) Inverted output of CH4 3 OPIN1 (−) Inverting input for CH1 OP-AMP 17 VO3 (+) Non inverted output of CH3 4 OPOUT1 Output for CH1 OP-AMP 18 VO3 (−) Inverted output of CH3 5 IN2 Input for CH2 19 PowVCC3 VCC for CH3/4 power block 6 MUTE Input for CH1 mute control 20 STBY1 Input for CH1/3/4 stand by control 7 STBY2 Input for CH2 stand by control 21 GND Substrate ground 8 GND Substrate ground 22 OPOUT3 Output for CH3 OP-AMP 9 PowVCC1 VCC for CH1 power block 23 OPIN3 (−) Inverting input for CH3 OP-AMP 10 PowVCC2 VCC for CH2 power block 24 OPIN3 (+) Non inverting input for CH3 OP-AMP 11 VO2 (−) Inverted output of CH2 25 OPOUT4 Output for CH4 OP-AMP 12 VO2 (+) Non inverted output of CH2 26 OPIN4 (−) Inverting input for CH4 OP-AMP 13 VO1 (−) Inverted output of CH1 27 OPIN4 (+) Non inverting input for CH4 OP-AMP 14 VO1 (+) Non inverted output of CH1 28 PreVCC VCC for pre block Note) Symbol of + and − (output of drivers) means polarity to input pin. (For example if voltage of pin4 high, pin14 is high.) 2/8 BA5995FM Optical disc ICs !Input output circuits Pin 7, 20 Pin 3, 23, 26 Input for stand by control Input for operational amplifier Pin 2, 24, 27 50k 50k 50k 50k Pin 4, 5, 22, 25 Output of OP-amp & input for driver 10k Non inverted output Pin 12, 14, 15, 17 Output of driver 10k 10k 10k Inverted output Pin 11, 13, 16, 18 Pin 1 30k 60k Input for mute control Input for bias amplifier Pin 6 50k 50k Resistor unit : [Ω] 3/8 BA5995FM Optical disc ICs !Electrical characteristics (unless otherwise noted, Ta=25°C, PreVCC=12V, PowVCC=5V, VBIAS=1.65V, RL=8Ω) Parameter Symbol Min. Typ. Max. Unit IQ − 20 30 mA RL= ∞ CH1/3/4 standby current IQST1 − 5.2 12 mA R L= ∞ CH2 standby current IQST2 − 16 26 mA R L= ∞ All channel standby current IQST3 − − 1 mA R L= ∞ VOOF −70 0 70 mV Maximum output voltage 1 VOM1 3.6 4.0 − V VIN=VBIAS±1.65V Maximum output voltage 2 VOM2 7.5 9.0 − V VIN=VBIAS±1.65V POWVCC=12V Closed loop voltage gain GVC 16.6 17.6 18.6 dB VIN=VBIAS±0.3V Slew rate SRDRV − 2 − V/µs Standby on voltage VSTON − − 0.5 V Standby off voltage VSTOFF 2.0 − − V Bias drop mute on voltage VBMON − − 0.7 V Bias drop mute off voltage VBMOFF 1.3 − − V Mute on voltage VMTON 2.0 − − V Mute off voltage VMTOFF − − 0.5 V VMO −0.5 0 0.5 mV Quiescent current Conditions <Driver block> Output offset voltage 1 Output voltage on muting Input pulse 100kHz, 2VP-P tm=125µsec <Pre operational amplifier> Common mode input range Input offset voltage VOFOP 0 − 9.0 V IBOP −6 0 6 mV Input bias current VOHOP − − 300 nA IL=+300µA, VIN=3.3V High level output voltage VOLOP −6 0 6 mV IL=−1mA Low level output voltage SROP − 0.1 0.3 V − 2 − V/µs Slew rate Input pulse 100kHz, 2VP-P This product is not designed for protection against radioactive rays. 4/8 BA5995FM Optical disc ICs !Measurement circuit RL RL VO V 15 14 16 13 17 12 18 11 19 10 8Ω RL V VO V VO 8Ω V VO RL 8Ω 0.1µF 5V 8Ω 20 0.1µF 5V 0.1µF 5V 9 VST1 21 8 22 7 VST2 OPIN− 23 6 VMT OPIN+ 24 5 VIN 25 4 OPIN− 26 3 OPIN− OPIN+ 27 2 OPIN+ 28 1 OPOUT OPOUT A OPOUT 0.1µF VBIAS 1.65V IQ OPB VBOP+ 3 V 1M OPOUT OPIN− OPIN+ 12V VOFOP VBOP− V V 1 NF 2 2 OPRL 1M 1 2 1 1.65V VIN VOOP V IL Resistor unit : [Ω] Fig.1 5/8 3 10k 10k 4 25 20k + − 20k 23 20k 10 9 0.1µF H=ENABLE L=STANDBY H=MUTE L=ENABLE 12V (for ch2) ch3 ch2 LEVEL SHIFT LEVEL SHIFT 11 10k 10k PowVCC (ch2) 18 10k 10k PowVCC (ch1) 0.1µF 5V (for ch1) 8 19 STAND BY PowVCC ch1 / 3 / 4 (ch3 / 4) 20 + − 7 STBY ch2 20k + − 21 16 10k 10k 10k 10k 10k 10k 17 12 ch4 ch1 LEVEL SHIFT LEVEL SHIFT 13 10k 10k − + 6 MUTE ch1 10k 10k 22 + − TRAY 5 24 5V (for ch3, 4) + − 10k 10k 10k 15 14 10k − + TRACKING 26 − + BIAS 2 27 − + 1 PreVCC 28 + − FOCUS H=ENABLE L=STANDBY + − + − 0.1µF + − Sled motor + − Focus coil + − SLED BA5995FM !Application example Optical disc ICs Tracking coil Tray motor 0.1µF DIGITAL SERVO Resistor unit : [Ω] Fig.2 6/8 BA5995FM Optical disc ICs !Operation notes (1) Thermal shut down circuit is built in. In case IC chip temperature rises to 175°C(typ.), thermal shut down circuit operates and muted the output current. Next time IC chip temperature falls below 150°C(typ.), the driver blocks start. (2) Bias pin (pin1) should be pulled up more than 1.3V. In case bias pin voltage is under 0.7V(typ.), output current is muted. (3) In case supply voltage falls below 3.8V(typ.), output current is muted. Next time supply voltage rises to 4.0V (typ.), the driver blocks start. (4) Mute operation is caused by thermal shut down, decrease of bias pin voltage or decrease of supply voltage. When mute is done, output voltage becomes internal reference voltage (about PowVcc/2). (5) In case of one of the standby terminals turn into or open , correspondence channel circuit (include opamps) is muted. (6) Both of the standby terminals low or open, all circuits shutdown (sleep mode) and all output pins become high impedance. In addition to threshold is 1.4V(typ.). (7) Supply voltage of PreVCC should be equal to or higher than PowVCC. (8) Take care the external resistor value of OPamp . OPamp source current supplies to internal resistor (10KΩ) as well as external resistor. (9) Insert the by pass capacitor between VCC pin and GND pin of IC as near as possible (approximately 0.1µF). (10) Keep the GND pin voltage the lowest of all pins . (11) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the external GND. (12) If the mute pin (pin6) voltage rises above 2.0V, the output (CH1) current can be muted. Under normal operating conditions, make sure to open pin7 or pull it down below 0.5V. Next figure is high impedance mute timing chart. 2V PreVCC=12V PowVCC1=5V BIAS=1.65V RL=8Ω tm≤125µsec MUTE (Pin6) 0V t tm VOM VOUT (Pin14-Pin13) 0.5mV 0V t 7/8 BA5995FM Optical disc ICs !Electrical characteristic curves 0 ch2 ch1 ch4 ch3 −50 Pin14-Pin13 OUTPUT VOLTAGE : (V) OUTPUT OFFSET VOLTAGE : (mV) Ta=25°C Output offset voltage BIAS=1.65V Pre OR Amp=Buffer OP input=BIAS Ta=25˚C PreVCC=5V PowVCC=5V BIAS=1.65V RL= 20Ω 16Ω 12Ω 8Ω 3 4Ω 2 1 −1.5 −1.0 −0.5 0 0.5 1.0 1.5 −1 −2 −3 −4 −5 0 5 10 Fig.3 Output offset voltage vs. power supply voltage characteristic Pin14-Pin13 OUTPUT VOLTAGE : (V) 4Ω 2 −1.0 −0.5 0 0.5 4Ω 3 2 1 −1.5 −1.0 −0.5 0 0.5 1.0 1.5 −1 −2 −3 −4 −5 Pin4-Pin1 INPUT VOLTAGE : (V) Fig.4 I/O characteristic (ch1) Fig.5 I/O characteristic (ch1) 12 RL= 20Ω 16Ω 12Ω 8Ω 6 4 −1.5 R L= 20Ω 16Ω 12Ω 8Ω 4 Pin4-Pin1 INPUT VOLTAGE : (V) 8 Ta=25˚C PreVCC=8V PowVCC=8V BIAS=1.65V Ta=25˚C PreVCC=12V PowVCC=5V BIAS=1.65V 15 Pre / Pow VCC SUPPLY VOLTAGE (V) Pin14-Pin13 OUTPUT VOLTAGE : (V) 5 4 Pin14-Pin13 OUTPUT VOLTAGE : (V) 5 50 1.0 1.5 −2 −4 −6 Ta=25˚C PreVCC=12V PowVCC=12V BIAS=1.65V RL= 20Ω 16Ω 12Ω 8Ω 10 8 6 4Ω 4 2 −1.5 −1.0 −0.5 0 −2 0.5 1.0 1.5 −4 −6 −8 −10 −12 −8 Pin4-Pin1 INPUT VOLTAGE : (V) Pin4-Pin1 INPUT VOLTAGE : (V) Fig.7 I/O characteristic (ch1) Fig.6 I/O characteristic (ch1) !External dimensions (Units : mm) 18.5±0.2 0.5±0.2 9.9±0.3 15 7.5±0.2 28 1 14 2.2±0.1 0.11 5.15±0.1 0.8 0.35±0.1 0.08 M 16.0±0.2 0.25±0.1 0.1 S HSOP28-M 8/8