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| BA5974FP IC CD BA5974FP BA5974FP CD 3ch 4ch BTL 4ch BTL 1 LSI PWM ! CD/MD CD-ROM ! 1) 4ch BTL 2) HSOP28 3) 3ch PWM 4) 5) 6) 1 RC PreVCC=8V PowVCC=8V RL=8 5.6V Typ. ! Ta=25C ! BA5974FP IC ! 28 27 26 25 24 23 22 21 20 19 18 17 16 15 10k Pre Vcc 100k F INTERFACE F LEVEL SHIFT Pow 50k Vcc Vref THERMAL SHUTDOWN 50k R R 190k MUTE 50k Pow 50k Vcc INTERFACE F R F R INTERFACE F R F R Pow Vcc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 BA5974FP IC ! BA5974FP IC ! 7.3k ch1 3 2,5,24pin ch1 3 3,6,23pin 17k 17k 10k 9pin 20k 50k 11 18pin 50k 10k 20pin 50k 50k 1pin 26pin 17k 100k ch1 3 4,7,22pin 25pin 10k 27pin BA5974FP IC ! Ta=25C, VCC=8V, RL=8 BA5974FP IC ! Vb Vb4 V Ipre Pre Vcc 28 27 A IM Vsin Ib 26 25 F R INTF OUT Vm Ipow RL Vo RL Vo A Pow Vcc 24 23 22 21 20 19 18 V 17 V 16 V 15 V 10k Pre Vcc 100k F 190k INTERFACE F R R MUTE 50k 50k Pow Vcc 50k F Vref 50k Pow Vcc LEVEL SHIFT THERMAL SHUTDOWN INTERFACE F R F R INTERFACE F R R Pow Vcc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 V Vo 1 F R INTF OUT F R INTF OUT RL V V Vo RL V Vref Iref V Vref F R INTF OUT IC PR IN PF Vf IC SW PR IN Vr PF ICON IL IP A A Ir Vref VL A Vref 100 Vref Moni Fig.1 BA5974FP IC ! RL IQ VBIAS VBIAS VMOFF VMON ch1 3 VIH VIL IIH IILF IILR VOO VOM ICONST tr tf tr-f LIN ON ch4 IB VOO4 VOM4 GVC OFF ON ON OFF OPEN Vb4 / 1M VO4 VO4 VO4, Vsin Vb Vsin 2.5V OFF IN IL Vo OFF PR PF ICON IP OFF ON OFF Vf, Vr Vf, Vr If, Ir If Ir Vo Vo I con Moni Moni tr tf Vf Vr 5 V Vf 0 V Vr 0 V ON OFF IB OFF IC IN SW OPEN Ipre Ipow Vref Vref Vm Vm Vf Vr 0V BA5974FP IC ! (1) ch13 I1 C1 F INTER FACE R SW 1 A SW 2 R1 BUF1 OUT1 OUT2 BUF2 I2 Fig.2 5V FR 0V 1V OUT2 1 OUT1 2 RF 0V Fig.3 Fig.4 IC I1 Fig.4 I1 R1!3.0V Vref RxC=3.0s A RC Fig.3 SW2 ON DUTY H -3.0V 6.0V 4 7 22pin ICONST H Fig.2 2.4V BUF1 BUF2 BTL SW1 A DC Fig.2 C Vref I1 I2 (2) ch4 BIAS Vref RC 26pin 2 27pin BIAS BTL 190k 100k 2.5V Fig.5 ! IC MUTE SPINDLE MOTOR SLED MOTOR REVERSE FORWARD SPINDLE OUT 0.1 Bias2.5V 0.1 F 28 10k 100k F R MUTE D 27 50k R Pow 50k Vcc D 26 25 24 23 22 21 20 19 18 17 16 15 F Pre Vcc INTERFACE 190k F Pow Vcc 50k F INTERFACE F R R INTERFACE F R R F Vref 50k D D LEVEL SHIFT Pow Vcc REVERSE FORWARD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 FORWARD REVERSE FORWARD TRACKING COIL FOCUS COIL REVERSE D D D D Fig.6 THERMAL SHUTDOWN BA5974FP BA5974FP IC ! (1) BA5974FP (2) (3) (4) (5) 160C Typ. 20pin 0.5V ON IC FIN GND 0.1F GND 4ch ! ! Unit : mm 18.5 0.2 28 15 0.3 9.9 7.5 0.2 1 2.2 0.1 5.15 0.1 14 0.11 0.8 0.35 0.1 0.3Min. 0.15 HSOP28 0.25 0.1 |
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