BA5961FV Optical disc ICs Power driver for CD player BA5961FV BA5961FV is 1ch BTL driver IC for tilt coil driving used for DVD-ROM / DVD-RAM / CD-ROM / CD-RW. 2 general-purpose operational amplifiers are integrated into the small package, this IC has achieved a reduction of its size, and external components. This IC can be used not only for tilt coil, but also for wide variety of applications. !Applications DVD-ROM, DVD-RAM, CD-ROM, CD-RW !Features 1) 1ch BTL driver. 2) SSOP-B20W power package enables the smallest configuration. 3) Separating VCC into Pre and Power can be make better power efficiency. 4) Built in level shift circuit. 5) Built in thermal-shut-down circuit. 6) Built in three operational amplifiers .(Two general purpose operational amplifiers and one pre operational amplifier.) !Absolute maximum ratings (Ta=25°C) Parameter Symbol Limits Unit Preblock power supply voltage PreVCC 18 V Powerblock power supply voltage PowVCC 18 V W Pd 1.18∗ Operating temperature Topr −35~+85 °C Storage temperature Tstg −55~+150 °C Power dissipation ∗ PCB (70mm×70mm×1.6mm, glass epoxy) mounting. Reduce power by 9.44mW for each degree above 25°C. !Recommended operating conditions (Set the power supply voltage taking allowable dissipation into considering) Parameter Symbol Min. Typ. Max. Preblock power supply voltage PreVCC 4.3 5 13.5 Powerblock power supply voltage PowVCC 4.3 5 PreVCC Unit V 1/7 BA5961FV Optical disc ICs !Block diagram 20 19 18 17 16 15 14 13 12 11 + − + − + − + − IN LEVEL SHIFT + − STAND-BY TSD 1 2 3 + − Pow GND 1 + − Pre GND Pow VCC 4 5 6 Pow GND 2 Pre VCC 8 9 7 10 TSD : Thermal shut down !Pin descriptions Pin No. Pin name Pre ground 11 OP3+ OP-AMP3 positive input Power ground (For positive output) 12 OP3− OP-AMP3 negative input Driver positive output 13 OP3OUT Driver positive output 14 OP2+ OP-AMP2 positive input Powerblock power supply 15 OP2− OP-AMP2 negative input OUT− Driver negative output 16 OP2OUT 7 OUT− Driver negative output 17 OP1+ OP-AMP1 positive input 8 PowGND2 Power ground (For negative output) 18 OP1− OP-AMP1 negative input 9 PreVCC Pre block power supply 19 IN 10 STBY Stand-by control input 20 BIAS Pin No. Pin name 1 PreGND 2 PowGND1 3 OUT+ 4 OUT+ 5 PowVCC 6 Functions Functions OP-AMP3 output OP-AMP2 output OP-AMP1 output and driver input Bias input 2/7 BA5961FV Optical disc ICs !Input output circuits Driver output OP-AMP input Pre VCC positive output 3, 4pin Pre VCC 1k positive input 11, 14, 17pin 10k Pow VCC Pre VCC 1k negative input 12, 15, 18pin 10k negative output 6, 7pin 10k BIAS input OP-AMP output Pre VCC Pre VCC Pre VCC 24.3k Pre VCC 13, 16pin 50k 20pin 100k Pre-OP-AMP output and driver input Stand-by control input Pre VCC Pre VCC Pre VCC 19pin Pre VCC 10pin 100k 24.3k 100k 3/7 BA5961FV Optical disc ICs !Electrical characteristics (unless otherwise noted, Ta=25°C, PreVCC=PowVCC=5V, VBIAS=1.65V, RL=8Ω) Parameter Conditions Measuring circuit Fig.1 Symbol Min. Typ. Max. Unit IQ − 10.0 14.0 mA Output offset voltage VOOF −60 − 60 mV Maximum output voltage amplitude VOM 3.0 3.6 − V Maximum output voltage amplitude (Separated voltage supply) VOMS 3.5 4.2 − V PreVCC=12V, PowVCC=5V Fig.1 Closed circuit gain GVC 16.0 18.0 20.0 dB VIN=1.35V, 1.95V Fig.1 Srand-by ON voltage VSTON − − 0.5 V Fig.1 Srand-by OFF voltage VSTOFF 2.0 − − V Fig.1 Quiescent current without signal <Driver block> VIN=BIAS=1.65V Fig.1 Fig.1 <Operational amplifier> VOFOP −6 0 6 mV Fig.1 Input bias current IBOP − 30 300 nA Fig.1 Common mode input range VICM 0.1 − 3.8 V High level output voltage VOH 4.1 4.8 − V VIN=GND, Invert amp. Fig.1 Low level output voltage VOL − 0.2 0.9 V VIN=VCC, Invert amp. Fig.1 Output drive current(Sink) ISI 0.5 − − mA Output drive current(Sorce) ISO 0.5 − − mA SROP − 1 − V / µs Offset voltage Slew rate Fig.1 Fig.1 Fig.1 100kHz square wave, 2Vpk-pk Fig.1 This product in not designed for protection against radioactive rays. 4/7 BA5961FV Optical disc ICs !Measuring circuit OPIN− OPIN+ OPOUT OPIN− OPIN+ OPOUT OPIN− OPIN+ 20 OPOUT VBIAS 19 18 17 16 15 14 13 12 11 BA5961FV 1 2 3 4 5 6 0.1µ 7 8 9 10 0.1µ A IQ 0.1µ RL VST VCC=5V 8 V OPOUT OPIN− OPIN+ VO VIOF OPB 3 V 1M VBOP V NF V 3 1M 1 2 OPIN ISI 3 1 1 VOOP 2 1.65V OPBIAS 2 10k 10k OPRL 1 V 2 ISO VIN Fig.1 5/7 BA5961FV Optical disc ICs 1. Switch table (1) Driver (VBIAS=OPBIAS=1.65V, OPIN→2, NF→2, OPRL→1) Symbol Switch RL Input VST VIN Measuring point IQ OFF − 2.0V IQ Voof ON 1.65V 2.0V VO VOM ON ∗1 2.0V ∗1 VIN=0V and 5V VO GVC ON ±0.3V 2.0V VIN=1.35V and 1.95V VO VSTON ON 5V 0.5V VO VSTOFF ON 5V 2.0V VO (2) OP-AMP (VST=2.0V, VBIAS=1.65V, RL→OFF) Symbol OPB Input Switch NF OPRL OPIN VIN OPBIAS Measuring point VOFOP 1 1 1 1 − 1.65V VIOF IBOP 1 3 1 1 − 1.65V VBOP / 1MΩ VOHOP 1 2 1 2 0V 2.5V VBIAS=2.5V VOOP VOLOP 1 2 1 2 5V 2.5V VBIAS=2.5V VOOP ISI 1 1 3 1 − 1.65V ISI=0.5mA VIOF ISO 1 1 2 1 − 1.65V ISO=0.5mA VIOF SROP 2 1 1 1 − ±1V 100kHz square wave, 2Vp-p input VOOP !Application example SERVO PRE AMP 10k SIGNAL BIAS STAND-BY 10k 20 19 18 17 16 15 14 13 12 11 7 8 9 10 BA5961FV 1 2 3 4 5 6 0.1µ 0.1µ VCC M LOAD Fig.2 6/7 BA5961FV Optical disc ICs !Operation notes 1. A thermal-shutdown circuit (over-temperature protection circuit) is built in to prevent the IC from thermal breakdown. Use the IC under the thermal loss allowed to the package. In case the IC is left running over the allowable loss, the junction temperature rises, and the thermal-shutdown circuit works at the junction temperature of 175°C (typ.) (the outputs of the driver is turned off). When the junction temperature drops to 150°C (typ.), the IC start operating again. 2. When stand-by control terminal (Pin 10) drops below 0.5V, stand-by mode is established. Make sure that under normal operating conditions, this pin at 2.0V or above. 3. If PreVCC (Pin 9) drops below 3.4V (typ.), the driver is turned off. When the voltage exceeds 3.6V (typ.) the driver returns to its previous state. 4. If the bias pin (Pin 20) drops below 0.7V, the output is muted. Make sure that under normal operating conditions, this pin is at 1.0V or above. 5. The output is muted in the event of a thermal shut down, mute-on, or a bias and Pre-VCC voltage drop. Only the driver is muted. When muted, the internal bias voltage of the output pin becomes roughly (Pow VCC-Vf) / 2). 6. Please connect a bypass capacitor (0.1µF) across the supply voltage lines close to the IC pins. 7. When a capacitance load is connected to the OP amplifier output, the amplifier phase margin decreases, which causes the peak or oscillation. When connecting such load, insert a resistance in series between the output and the capacitance load and take a full consideration for frequency characteristics to prevent problem during practical use. 8. Do not short-circuit between any output pin and supply pin (supply fault) or ground (ground fault), or between any output pins (load short-circuit). When mounting the IC on the circuit board, be extremely cautions about the orientation of the IC. If the orientation is mistaken, the IC may break down, and produce smoke in some cases. !Electrical characteristics curve POWER DISSIPATION : Pd (W) 1.5 On less than 3% (percentage occupied by copper foil), 70mm×70mm, t=1.6mm glass epoxy mounting. 1.0 0.5 0 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE : Ta (°C) Fig.3 Power dissipation !External dimensions (Units : mm) 6.5±0.2 11 1 10 1.7±0.2 0.11 0.3Min. 8.1±0.3 6.1±0.2 20 0.65 0.15±0.1 0.1 0.22±0.1 SSOP-B20W 7/7