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| IC for Compact Disc Players BA5947FP Description The BA5947FP is a 4-channel BTL driver developed for compact disc players. 3 out of 4 channels are PWM input direct connection type and incorporate primary filter. Dimension (Unit : mm) 28 18.5 0.2 15 9.9 0.3 7.5 0.2 1 Features 1) 4-channel BTL driver 2) Set space saving by adoption of HSOP28 3) Built-in OP amp. 4) Wide dynamic range 5) Built-in thermal shutdown circuit 6) High efficient supply voltage setting due to independent supply (Pre Vcc, Pow Vcc of CH1, CH2 and Pow Vcc of CH3, CH4) 7) For CH4, input pin can be switched by SW pin 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 Applications Compact disc players, Other optical disc appliances Absolute Maximum Ratings (Ta=25C) Parameter Supply voltage Power dissipation Operating temperature range Storage temperature range Symbol Vcc Pd Topr Tstg Limits 13.5 1.7 -35 ~ -55 ~ Unit V W +85 +150 Derating : 13.6mW/C for operation above Ta=25C On less than 3% (percentage occupied by copper foil), PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. C C Operating power supply voltage range (Ta=25C) Parameter Min. 6.0 6.0 Typ. Pre Vcc Pow Vcc Max. 13.2 Unit V V Pre Vcc 0.5 0.2 Electrical characteristics (Unless otherwise noted; Ta=25C, Vcc=8V, RL=8, Vb=VOP+=1.75V) Parameter Quiescent dissipation current Symbol IQ Min. 3.40 -30 4.4 -50 9.3 -5 2.0 7.0 Typ. 17.0 3.70 5.0 5.4 11.3 0 9.0 13.0 Max. 25.0 4.00 30 5.6 50 13.3 5 Unit mA V mV V mV V dB mV mA mA Vf=5V, Vr=0V VIN4=Vb Vb=4V Conditions No load Internal Vref pin voltage VREF Application Circuit SPINDLE MOTOR 15 M 16 17 M 18 0.1F D D D D POW VCC (ch3, 4) LEVEL SHIFT D D D 14 13 12 11 10 9 8 TRACKING COIL SLED MOTOR 19k PIN26 6.5k 10k POW VCC POW VCC D POW VCC (ch1, 2) FOCUS COIL 0.1F 19 20 21 Vref 50k 50k 50k 50k 50k 50k Vref MUT E R F F R R 22 23 24 0.47F R F 100k 10k PIN3 50k INTER FACE F R INTER FACE 7 6 5 F 25 26 27 0.1F INTER FACE F SW 4 3 2 1 3000pF 82k H=ON L=OFF 15k 28 Pre Vcc - + BA5947FP MUTE REVERSE FORWARD SLED OUT 1.75V BIAS SPINDLE OUT FORWARD REVERSE FORWARD REVERSE TRACKING ERROR OUT FOCUS ERROR OUT DIGITAL SERVO |
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