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) 0.5 ± 0.2 9.9 ± 0.3 2.2 ± 0.1 Absolute Maximum Ratings (Ta=25˚C) Symbol Limits Vcc 13.5 1.7 Operating temperature range Pd Topr Storage temperature range Tstg Supply voltage Power dissipation Unit V ∗ W -35 ~ +85 -55 ~ +150 ˚C ˚C ∗Derating : 13.6mW/˚C for operation above Ta=25˚C ∗On less than 3% (percentage occupied by copper foil), PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. Operating power supply voltage range (Ta=25˚C) Parameter Min. Typ. Max. Unit Pre Vcc 6.0 - 13.2 V Pow Vcc 6.0 - Pre Vcc V 15 5.15 ± 0.1 14 0.8 0.35 ± 0.1 0.08 M 16.0 ± 0.2 HSOP28 Applications Compact disc players, Other optical disc appliances Parameter 0.11 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 18.5 ± 0.2 7.5 ± 0.2 28 0.25 ± 0.1 0.1 S Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=8V, RL=8Ω, Vb=VOP+=1.75V) Parameter Symbol Quiescent dissipation current IQ Internal Vref pin voltage VREF <Driver except spindle driver (CH1,2,3)> Min. - Typ. Max. Unit 17.0 25.0 mA 3.40 3.70 4.00 V Output offset voltage VOO -30 - 30 mV Maximum output amplitude VOM 4.4 5.0 5.6 V Output offset voltage VOO4 -50 - 50 mV Maximum output amplitude Voltage gain VOM - 5.4 - V GVC 9.3 11.3 13.3 dB VOFOP -5 0 5 mV Isink 2.0 9.0 - mA ISOURCE 7.0 13.0 - mA Conditions No load Vf=5V, Vr=0V Spindle driver (CH4) VIN4=Vb Vb=4V <OP amp.> Offset voltage Output driving current sink Output driving current source Application Circuit 16 D 17 D LEVEL SHIFT M D 19k 18 D 19 POW VCC (ch3, 4) 20 10k 24 0.47µF 25 26 MUTE 28 50k 50k 12 D 11 F F INTER FACE F R F 100k 7 6 5 INTER FACE 4 F 50k Pre Vcc 0.1µF R R INTER FACE 10k PIN3 FOCUS COIL 8 Vref MUT E F 10 TRACKING COIL 9 POW VCC R 27 0.1µF D 50k 50k R 23 13 POW VCC (ch1, 2) POW VCC 50k 50k 21 22 Vref 14 D SW 3 + 0.1µF PIN26 6.5k D 2 – SLED MOTOR 15 M SPINDLE MOTOR 1 H=ON L=OFF 3000pF 15kΩ 82kΩ BA5947FP REVERSE FORWARD SLED OUT BIAS 1.75V SPINDLE OUT DIGITAL SERVO FORWARD REVERSE FORWARD REVERSE TRACKING ERROR OUT FOCUS ERROR OUT