BA5995FM

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 Symbol PreVcc, PowVcc Pd IoMax Topr Tstg Limits 13.5 2.2 1 ∗1 ∗2 Unit V W A ˚C ˚C Power supply voltage Power dissipation Max output current Operating temperature range Storage temperature range −35 to +85 −55 to +150 ∗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 PreVcc PowVcc Limits 4.5 to 13.2V 4.5 to PreVcc Unit V V Vcc for pre block Vcc for power block 1/8 BA5995FM Optical disc ICs !Block diagram 28 27 26 25 24 23 22 21 20 19 18 10k PreVCC STAND BY PowVCC ch1 / 3 / 4 (ch3 / 4) 20k 20k 10k + − 10k + − 10k LEVEL SHIFT ch3 17 16 ch4 15 10k 10k 10k + − + − + − + − + − 10k 10k + − 10k 10k ch1 LEVEL SHIFT + − 10k 20k 10k + − 20k 10k LEVEL SHIFT 10k 10k LEVEL SHIFT + − MUTE ch1 STBY ch2 + − + − + − PowVCC (ch1) PowVCC (ch2) 10k 1 2 3 4 5 6 7 8 9 10 11 ch2 10k 10k 12 13 Resistor unit : [Ω] !Pin descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin name BIAS IN OPIN1 (+) OPIN1 (−) OPOUT1 IN2 MUTE STBY2 GND PowVCC1 PowVCC2 VO2 (−) VO2 (+) VO1 (−) VO1 (+) Function Input for bias-amplifier Non inverting input for CH1 OP-AMP Inverting input for CH1 OP-AMP Output for CH1 OP-AMP Input for CH2 Input for CH1 mute control Input for CH2 stand by control Substrate ground VCC for CH1 power block VCC for CH2 power block Inverted output of CH2 Non inverted output of CH2 Inverted output of CH1 Non inverted output of CH1 Pin No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin name VO4 (+) VO4 (−) VO3 (+) VO3 (−) PowVCC3 STBY1 GND OPOUT3 OPIN3 (−) OPIN3 (+) OPOUT4 OPIN4 (−) OPIN4 (+) PreVCC Function Non inverted output of CH4 Inverted output of CH4 Non inverted output of CH3 Inverted output of CH3 VCC for CH3/4 power block Input for CH1/3/4 stand by control Substrate ground Output for CH3 OP-AMP Inverting input for CH3 OP-AMP Non inverting input for CH3 OP-AMP Output for CH4 OP-AMP Inverting input for CH4 OP-AMP Non inverting input for CH4 OP-AMP 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.) + − 10k 14 2/8 BA5995FM Optical disc ICs !Input output circuits Pin 7, 20 Input for operational amplifier Output of OP-amp & input for driver Pin 1 Input for stand by control Pin 2, 24, 27 Pin 3, 23, 26 50k 50k 50k 50k Pin 4, 5, 22, 25 10k Non inverted output Pin 12, 14, 15, 17 10k Output of driver 10k 10k Inverted output Pin 11, 13, 16, 18 Pin 6 Input for bias amplifier Input for mute control 50k 30k 50k 60k 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 Quiescent current CH1/3/4 standby current CH2 standby current All channel standby current Output offset voltage 1 Maximum output voltage 1 Maximum output voltage 2 Closed loop voltage gain Slew rate Standby on voltage Standby off voltage Bias drop mute on voltage VOOF VOM1 VOM2 GVC SRDRV VSTON VSTOFF VBMON −70 3.6 7.5 16.6 − − 2.0 − 0 4.0 9.0 17.6 2 − − − − − − 0 − 0 − 0 0.1 2 70 − − 18.6 − 0.5 − 0.7 − − 0.5 0.5 mV V V dB V/µs V V V VIN=VBIAS±1.65V VIN=VBIAS±1.65V POWVCC=12V VIN=VBIAS±0.3V Input pulse 100kHz, 2VP-P Symbol IQ IQST1 IQST2 IQST3 Min. − − − − Typ. 20 5.2 16 − Max. 30 12 26 1 Unit mA mA mA mA RL= ∞ R L= ∞ R L= ∞ R L= ∞ Conditions Bias drop mute off voltage Mute on voltage Mute off voltage Output voltage on muting Common mode input range Input offset voltage Input bias current High level output voltage Low level output voltage Slew rate VBMOFF VMTON VMTOFF VMO 1.3 2.0 − −0.5 V V V mV tm=125µsec VOFOP IBOP VOHOP VOLOP SROP 0 −6 − −6 − − 9.0 6 300 6 0.3 − V mV nA mV V V/µs IL=+300µA, VIN=3.3V IL=−1mA Input pulse 100kHz, 2VP-P This product is not designed for protection against radioactive rays. 4/8 BA5995FM Optical disc ICs !Measurement circuit RL 15 VO V 8Ω 16 RL 17 VO V 8Ω 18 11 12 8Ω V VO 13 RL 14 8Ω V VO RL 19 5V 0.1µF 20 VST1 21 10 0.1µF 9 0.1µF 8 5V 5V OPOUT 22 7 VST2 OPIN− 23 6 VMT OPIN+ 24 5 VIN OPOUT 25 4 OPOUT OPIN− 26 3 OPIN− OPIN+ 0.1µF 27 2 OPIN+ A IQ 28 1 VBIAS 1.65V 12V VOFOP VBOP+ OPB 3 V 1M 2 1 NF 2 V VBOP− V OPRL 1 2 1M 1.65V VIN 1 OPOUT OPIN+ OPIN− VOOP V IL Resistor unit : [Ω] Fig.1 5/8 SLED 5V (for ch3, 4) Optical disc ICs Focus coil FOCUS !Application example Sled motor 0.1µF H=ENABLE L=STANDBY PreVCC + − + − + − STAND BY PowVCC ch1 / 3 / 4 (ch3 / 4) 20k 10k 10k 10k LEVEL SHIFT + − 10k LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT 10k 10k 10k 10k + − + − MUTE ch1 STBY ch2 PowVCC (ch1) PowVCC (ch2) 10k 1 2 3 4 5 6 7 8 9 10 11 ch2 10k 10k 12 13 ch1 H=ENABLE L=STANDBY BIAS 0.1µF 5V (for ch1) TRAY Tray motor Tracking coil TRACKING 12V (for ch2) + − 10k 14 DIGITAL SERVO + − + − 10k 20k 10k 20k + − + − 0.1µF 28 10k 27 26 25 24 23 22 21 20 19 18 ch3 17 16 10k 10k ch4 15 10k + − + − 20k 10k 10k Fig.2 H=MUTE L=ENABLE + − + − 0.1µF Resistor unit : [Ω] BA5995FM 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 MUTE (Pin6) 0V t PreVCC=12V PowVCC1=5V BIAS=1.65V RL=8Ω tm≤125µsec tm VOM VOUT (Pin14-Pin13) 0.5mV 0V t 7/8 BA5995FM Optical disc ICs !Electrical characteristic curves 50 5 5 Pin14-Pin13 OUTPUT VOLTAGE : (V) OUTPUT OFFSET VOLTAGE : (mV) 4 3 2 1 Pin14-Pin13 OUTPUT VOLTAGE : (V) 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 4Ω Ta=25˚C PreVCC=12V PowVCC=5V BIAS=1.65V 4 3 2 1 R L= 20Ω 16Ω 12Ω 8Ω 4Ω 0 −1.5 −1.0 −0.5 0 −1 −2 −3 −4 −5 0.5 1.0 1.5 −1.5 −1.0 −0.5 0 −1 −2 −3 −4 −5 0.5 1.0 1.5 ch2 ch1 ch4 ch3 −50 0 5 10 15 Pin4-Pin1 INPUT VOLTAGE : (V) Pin4-Pin1 INPUT VOLTAGE : (V) Pre / Pow VCC SUPPLY VOLTAGE (V) Fig.3 Output offset voltage vs. power supply voltage characteristic Fig.4 I/O characteristic (ch1) Fig.5 I/O characteristic (ch1) 8 12 Pin14-Pin13 OUTPUT VOLTAGE : (V) 6 4 2 Pin14-Pin13 OUTPUT VOLTAGE : (V) Ta=25˚C PreVCC=8V PowVCC=8V BIAS=1.65V RL= 20Ω 16Ω 12Ω 8Ω 4Ω Ta=25˚C PreVCC=12V PowVCC=12V BIAS=1.65V 10 8 6 4 2 RL= 20Ω 16Ω 12Ω 8Ω 4Ω −1.5 −1.0 −0.5 0 −2 −4 −6 −8 0.5 1.0 1.5 −1.5 −1.0 −0.5 0 −2 −4 −6 −8 −10 −12 0.5 1.0 1.5 Pin4-Pin1 INPUT VOLTAGE : (V) Pin4-Pin1 INPUT VOLTAGE : (V) Fig.6 I/O characteristic (ch1) Fig.7 I/O characteristic (ch1) !External dimensions (Units : mm) 18.5±0.2 28 15 9.9±0.3 7.5±0.2 1 5.15±0.1 0.8 0.35±0.1 0.08 M 16.0±0.2 14 0.25±0.1 2.2±0.1 0.11 0.1 S HSOP28-M 0.5±0.2 8/8