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| 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=25C) Parameter Preblock power supply voltage Powerblock power supply voltage Power dissipation Operating temperature Storage temperature PCB (70mmx70mmx1.6mm, glass epoxy) mounting. Reduce power by 9.44mW for each degree above 25C. Symbol PreVCC PowVCC Pd Topr Tstg Limits 18 18 1.18 -35~+85 -55~+150 Unit V V W C C !Recommended operating conditions (Set the power supply voltage taking allowable dissipation into considering) Parameter Preblock power supply voltage Powerblock power supply voltage Symbol PreVCC PowVCC Min. 4.3 4.3 Typ. 5 5 Max. 13.5 PreVCC Unit V 1/7 BA5961FV Optical disc ICs !Block diagram 20 19 18 17 16 15 14 13 12 11 + - + - + - + - IN LEVEL SHIFT - + TSD STAND-BY + - + - Pre GND Pow GND 1 Pow VCC Pow GND 2 Pre VCC 1 2 3 4 5 6 7 8 9 10 TSD : Thermal shut down !Pin descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 Pin name PreGND PowGND1 OUT+ OUT+ PowVCC OUT- OUT- PowGND2 PreVCC STBY Pre ground Power ground (For positive output) Driver positive output Driver positive output Powerblock power supply Driver negative output Driver negative output Power ground (For negative output) Pre block power supply Stand-by control input Functions Pin No. 11 12 13 14 15 16 17 18 19 20 Pin name OP3+ OP3- OP3OUT OP2+ OP2- OP2OUT OP1+ OP1- IN BIAS Functions OP-AMP3 positive input OP-AMP3 negative input OP-AMP3 output OP-AMP2 positive input OP-AMP2 negative input OP-AMP2 output OP-AMP1 positive input OP-AMP1 negative input OP-AMP1 output and driver input Bias input 2/7 BA5961FV Optical disc ICs !Input output circuits OP-AMP input Driver output Pre VCC Pre VCC Pre VCC positive output 3, 4pin Pow VCC 10k 10k positive input 11, 14, 17pin 1k 1k negative input 12, 15, 18pin negative output 6, 7pin 10k OP-AMP output BIAS input 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=25C, PreVCC=PowVCC=5V, VBIAS=1.65V, RL=8) Parameter Quiescent current without signal This product in not designed for protection against radioactive rays. Symbol IQ Min. - -60 3.0 3.5 16.0 - 2.0 -6 - 0.1 4.1 - 0.5 0.5 - Typ. 10.0 - 3.6 4.2 18.0 - - Max. 14.0 Unit mA Conditions Measuring circuit Fig.1 VOOF VOM VOMS GVC VSTON VSTOFF 60 - - 20.0 0.5 - mV V V dB V V VIN=BIAS=1.65V Fig.1 Fig.1 PreVCC=12V, PowVCC=5V VIN=1.35V, 1.95V Fig.1 Fig.1 Fig.1 Fig.1 VOFOP IBOP VICM VOH VOL ISI ISO SROP 0 30 - 4.8 0.2 - - 1 6 300 3.8 - 0.9 - - - mV nA V V V mA mA V / s 100kHz square wave, 2Vpk-pk VIN=GND, Invert amp. VIN=VCC, Invert amp. Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 4/7 BA5961FV Optical disc ICs !Measuring circuit OPOUT OPIN- OPIN+ OPOUT OPIN- OPIN+ OPOUT OPIN- OPIN+ VBIAS 20 19 18 17 16 15 14 13 12 11 BA5961FV 1 2 3 4 5 6 7 8 9 10 0.1 RL 0.1 IQ A 0.1 VST 8 V VO VCC=5V OPIN+ VIOF OPB 3 V 1M 2 1 OPIN V NF 3 1 1 1.65V OPBIAS 2 10k 2 OPIN- VBOP V 1M ISI 3 OPRL 1 VOOP 10k V ISO 2 VIN Fig.1 OPOUT 5/7 BA5961FV Optical disc ICs 1. Switch table (1) Driver (VBIAS=OPBIAS=1.65V, OPIN2, NF2, OPRL1) Symbol IQ Voof VOM GVC VSTON VSTOFF Switch RL OFF ON ON ON ON ON Input VST VIN - 1.65V 1 0.3V 5V 5V 2.0V 2.0V 2.0V 2.0V 0.5V 2.0V 1 VIN=0V and 5V VIN=1.35V and 1.95V Measuring point IQ VO VO VO VO VO (2) OP-AMP (VST=2.0V, VBIAS=1.65V, RLOFF) Symbol VOFOP IBOP VOHOP VOLOP ISI ISO SROP OPB 1 1 1 1 1 1 2 Input Switch NF OPRL OPIN VIN OPBIAS 1 3 2 2 1 1 1 1 1 1 1 3 2 1 1 1 2 2 1 1 1 - - 0V 5V - - - 1.65V 1.65V 2.5V 2.5V 1.65V 1.65V 1V VBIAS=2.5V VBIAS=2.5V ISI=0.5mA ISO=0.5mA 100kHz square wave, 2Vp-p input Measuring point VIOF VBOP / 1M VOOP VOOP VIOF VIOF VOOP !Application example SERVO PRE AMP 10k SIGNAL 10k BIAS STAND-BY 20 19 18 17 16 15 14 13 12 11 BA5961FV 1 2 3 4 5 6 7 8 9 10 0.1 0.1 M LOAD VCC 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 175C (typ.) (the outputs of the driver is turned off). When the junction temperature drops to 150C (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 (0.1F) 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 1.5 POWER DISSIPATION : Pd (W) On less than 3% (percentage occupied by copper foil), 70mmx70mm, 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) 6.50.2 20 11 8.10.3 6.10.2 1 10 1.70.2 0.11 0.150.1 0.1 0.65 0.220.1 SSOP-B20W 0.3Min. 7/7 |
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