Power driver for CD player

Transcription

1 BA59F Power driver for CD player BA59F BA59F is ch BTL driver IC for tilt coil driving used for DD-ROM / DD-RAM / CD-ROM / CD-RW. 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 DD-ROM, DD-RAM, CD-ROM, CD-RW!Features ) ch BTL driver. ) SSOP-B0W power package enables the smallest configuration. ) Separating CC into Pre and Power can be make better power efficiency. 4) Built in level shift circuit. 5) Built in thermal-shut-down circuit. ) Built in three operational amplifiers.(two general purpose operational amplifiers and one pre operational amplifier.)!absolute maximum ratings (Ta=5 C) Parameter Symbol Limits Unit Preblock power supply voltage PreCC 8 Powerblock power supply voltage PowCC 8 Power dissipation Pd.8 W Operating temperature Topr 5~85 C Storage temperature Tstg 55~50 C PCB (70mm 70mm.mm, glass epoxy) mounting. Reduce power by 9.44mW for each degree above 5 C.!Recommended operating conditions (Set the power supply voltage taking allowable dissipation into considering) Parameter Symbol Min. Typ. Max. Unit Preblock power supply voltage Powerblock power supply voltage PreCC PowCC PreCC /7

2 Optical disc ICs BA59F!Block diagram TSD IN LEEL SHIFT STAND-BY Pre GND Pow GND Pow CC Pow GND Pre CC TSD : Thermal shut down!pin descriptions Pin No. Pin name Functions PreGND PowGND OUT OUT PowCC OUT OUT PowGND PreCC 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 Pin No. Pin name Functions OP OP OP OP OP OP IN BIAS OP-AMP positive input OP-AMP negative input OP-AMP output OP-AMP positive input OP-AMP negative input OP-AMP output OP-AMP positive input OP-AMP negative input OP-AMP output and driver input Bias input /7

3 BA59F!Input output circuits OP-AMP input Driver output Pre CC Pre CC Pre CC positive output, 4pin Pow CC 0k 0k positive input, 4, 7pin k k negative input, 5, 8pin negative output, 7pin 0k OP-AMP output BIAS input Pre CC Pre CC Pre CC Pre CC 4.k, pin 0pin 00k 50k Pre-OP-AMP output and driver input Stand-by control input Pre CC Pre CC Pre CC 9pin Pre CC 0pin 00k 4.k 00k /7

4 BA59F!Electrical characteristics (unless otherwise noted, Ta=5 C, PreCC=PowCC=5, BIAS=.5, RL=8Ω) Parameter Symbol Min. Typ. Max. Unit Conditions Measuring circuit Quiescent current without signal <Driver block> Output offset voltage Maximum output voltage amplitude Maximum output voltage amplitude (Separated voltage supply) Closed circuit gain Srand-by voltage Srand-by OFF voltage <Operational amplifier> Offset voltage Input bias current Common mode input range High level output voltage Low level output voltage Output drive current(sink) Output drive current(sorce) Slew rate OOF OM OMS GC ST STOFF OFOP IBOP ICM OH OL ISI ISO SROP ma m db m na ma ma / µs IN=BIAS=.5 PreCC=, PowCC=5 IN=.5,.95 IN=GND, Invert amp. IN=CC, Invert amp. 00kHz square wave, pk-pk Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. This product in not designed for protection against radioactive rays. 4/7

5 BA59F Optical disc ICs 5/7!Measuring circuit OPIN OPIN NF OPB RL OPIN OPRL OPBIAS BIAS M 0k BOP OOP ISI ISO IOF IN 0k M.5 Fig. 0.µ 0.µ 0.µ O 8 CC=5 ST BA59F A OPIN OPIN OPIN OPIN OPIN OPIN

6 BA59F. Switch table () Driver (BIAS=OPBIAS=.5, OPIN, NF, OPRL ) Symbol Switch Input RL IN ST Measuring point OFF.0 oof.5.0 O OM.0 IN=0 and 5 O GC ±0..0 IN=.5 and.95 O ST 5 O STOFF 5.0 O () OP-AMP (ST=.0, BIAS=.5, RL OFF) Symbol Switch Input OPB NF OPRL OPIN IN OPBIAS Measuring point OFOP.5 IOF IBOP.5 BOP / MΩ OHOP 0.5 BIAS=.5 OOP OLOP 5.5 BIAS=.5 OOP ISI.5 ISI=mA IOF ISO.5 ISO=mA IOF SROP ± 00kHz square wave, p-p input OOP!Application example 0k 0k SIGNAL SERO PRE AMP BIAS STAND-BY BA59F µ 0.µ M CC LOAD Fig. /7

7 BA59F!Operation notes. 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 75 C (typ.) (the outputs of the driver is turned off). When the junction temperature drops to 50 C (typ.), the IC start operating again.. When stand-by control terminal (Pin 0) drops below, stand-by mode is established. Make sure that under normal operating conditions, this pin at.0 or above.. If PreCC (Pin 9) drops below.4 (typ.), the driver is turned off. When the voltage exceeds. (typ.) the driver returns to its previous state. 4. If the bias pin (Pin 0) drops below 0.7, the output is muted. Make sure that under normal operating conditions, this pin is at.0 or above. 5. The output is muted in the event of a thermal shut down, mute-on, or a bias and Pre-CC voltage drop. Only the driver is muted. When muted, the internal bias voltage of the output pin becomes roughly (Pow CC-f) / ).. Please connect a bypass capacitor (0.µF) 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 DISSIPATI : Pd (W).5.0 On less than % (percentage occupied by copper foil), 70mm 70mm, t=.mm glass epoxy mounting AMBIENT TEMPERATURE : Ta ( C) Fig. Power dissipation!external dimensions (Units : mm).5±0. 0.7±0. 8.±0. 0..±0. 0.Min. 0 ± ±0. SSOP-B0W 7/7