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| UTC UA9392 LINEAR INTEGRATED CIRCUIT 4-CHANNEL BTL DRIVE FOR CD PLAYERS DESCRIPTION The UTC UA9392 is a 4-channel BTL driver for CD plsyer motors and actuators. It has an internal primary filter, and can be directly connected (without attached components) to the servo PWM output of all drivers other than the spindle driver. FEATURES *PWM input is filtered by the internal primary filter, eliminating the need for attached resistors and capacitors, thereby helping reduce the number of components. Resistor and capacitor time constant can be changed with attached components. *Internal mute circuit. *Thermal shutdown circuit is contained. *Level-shift circuit is contained. HSOP-28 APPLICATIONS CD players, CD-ROM drives. PIN CONFIGURATION CH4OUT R CH4OUT F CH3OUT R CH3OUT F 16 13 CH2OUT F CH3 RIN CH3 FIN RC IN3 MUTE 15 14 GND VSIN GND VBIN VBIN 28 27 26 25 24 23 Vcc Vcc 21 22 20 19 18 17 1 CH1OUT F 2 CH1OUT R 3 RC IN1 4 CH1 RIN 5 CH1 FIN 6 VREF IN 7 VREF OUT 8 GND 9 CH2 FIN 10 CH2 RIN 11 RC IN2 12 CH2OUT R UTC UNISONIC TECHNOLOGIES CO. LTD 1 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTIONS PIN NO. PIN NAME DESCRIPTION Drive channel 1 forward output Drive channel 1 reverse output Connect to attach resistor/capacitor(1) Drive channel 1 reverse input Drive channel 1 forward input Internal reference amplifier input Internal reference amplifier output Ground for internal reference and internal power circuit Drive channel 2 forward input Drive channel 2 reverse input Connect to attach resistor/capacitor(2) Drive channel 2 reverse output Drive channel 2 forward output Ground for internal reference and internal power circuit Drive mute control input Drive channel 3 forward output Drive channel 3 reverse output Connect to attach resistor/capacitor(3) Drive channel 3 reverse input Drive channel 3 forward input Power supply Power supply Drive channel 4 bias input* Drive channel 4 input Drive channel 4 bias input* Drive channel 4 reverse output Drive channel 4 forward output Ground for internal reference and internal power circuit 1 CH1OUT F 2 CH1OUT R 3 RC IN1 4 CH1 RIN 5 CH1 FIN 6 VREF IN 7 VREF OUT 8 GND 9 CH2 FIN 10 CH2 RIN 11 RC IN2 12 CH2OUT R 13 CH2OUT F 14 GND 15 MUTE 16 CH3OUT F 17 CH3OUT R 18 RC IN3 19 CH3 RIN 20 CH3 FIN 21 Vcc 22 Vcc 23 VBIN 24 VSIN 25 VBIN 26 CH4OUT R 27 CH4OUT F 28 GND *Pin23 and Pin25 are shorted internally. UTC UNISONIC TECHNOLOGIES CO. LTD 2 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM CH1OUTF CH1OUTR RCIN1 CH1RIN CH1FIN VREFIN VREFOUT 1 2 3 4 5 6 7 REV 28 GND F 27 CH4OUTF LEVEL SHIFT 26 CH4OUTR 190k 100k 25 VBIN 24 VSIN 23 VBIN R INTER FACE + - FWD + THERMAL SHUTDOWN CIRCUIT 22 VCC GND CH2FIN 8 9 FWD FWD 21 VCC INTER FACE R R INTER FACE 20 CH3FIN 19 CH3RIN 18 RCIN3 F F 17 CH3OUTR 16 CH2OUTF DRIVE MUTE 25k 15 MUTE CH2RIN 10 RCIN2 11 REV REV CH2OUTR 12 CH2OUTF 13 GND 14 25k UTC UNISONIC TECHNOLOGIES CO. LTD 3 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25) PARAMETER SYMBOL RATINGS UNIT Power supply voltage Vcc 16 V Power dissipation Pd 1.6 *1 W Operating temperature Topr -30 ~ +80 Storage temperature Tstg -55 ~ +150 *1: Reduce by 13.6mW for each increase in Ta of 1 over 25,When mounted on a 50 * 50 * 1.0 mm phenol paper PCB. RECOMMENDED OPEATING CONDITIONS(Ta=25) PARAMETER Supply voltage SYMBOL Vcc RATING 5 ~ 10 * 2 UNIT V *2 Set the power supply voltage according to power dissipation. ELECTRICAL CHARACTERISTICS(Ta=25,Vcc=8V,f=1kHz,RL=8, unless otherwise specified) ITEMS Quiescent current Bias pin voltage Bias pin voltage reguration Mute-off voltage Mute-on voltage SYMBOL IQ VBIAS VBIAS VMOFF VMON VIH TEST CONDITIONS No load 1mA source, sink MIN 5 3.4 -30 2.0 TYP. 12 3.68 MAX 18 4.00 30 0.5 UNIT mA V mV V V V V A A mV V V A pF s s s % dB nA V V V dB V/s dB 2.4 Input low level voltage VIL 0.5 IH Input high level current 170 310 450 VIN=5V IL Input low level current -10 0 VIN=0V Output voltage,offset VOO (Same for spindle) -30 30 Output high level voltage VOHD FIN=5V, RIN=0V 4.90 5.40 Output low level voltage VOLD FIN=0V, RIN=5V 1.50 2.00 Constant current IcONST 14 22 30 Internal integral capacitance C 24 tr Current pulse rise time 1 At startup 0.08 1 tf Current pulse fall time 2 At shutdown 0.55 1 tr-f Current pulse time differential -160 160 VIN=VREF0.5,1,1.5*1 Driver linearity LIN 90 100 110 Ripple rejection RR VIN=100mVrms,100Hz 70 UTC UNISONIC TECHNOLOGIES CO. LTD 4 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT CIRCUIT OPERATION (1) Fig. 2 shows the inputs from the digital servo IC for CH1-CH3 drivers(all drivers except the spindle).SW1 is on when the forward input signal(HIGH level, over 2.4V) is present,SW2 I on when the reverse input signal is present (Fig. 1) The constant current (I1) at this time enters the RC and generates an integral waveform based on the duty of the input waveform. The BTL is output from BUF1 and BUF2 (Fig.3). I1 SW1 F R INTERFACE SW2 I2 24pF 100K BUF2 BUF1 OUT R OUT F Fig. 1 To maintain the HIGH level with forward (or reverse) in-put, the DC voltage generated at point A is: I1xR 2.5V (reverse : - 2.5V) F (R) INPUT R (F) 5V 0V 0V Fig. 2 This is the voltage generated relative VREF. The setting is such that a voltage differential of 5V is generated be-tween output pins. The time constant is: RxC = 2.4sec This can be increased by inserting a capacitor between point A (pin3,11and 18) and VREF* The constant current (Iconst) given in the electrical characteristics refers to I1 and I2 in Fig.1. (2) CH4 driver (spindle driver) Pins 23 and 25 are shorted inside the IC.Bias amplitudes are the primarytype of inputs assumed. F R SW2 SW1 L L OFF OFF L H OFF ON H L ON OFF H H OFF OFF H: 2.4V Max. L: 0.5V Min. UTC UNISONIC TECHNOLOGIES CO. LTD 5 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT Output Vref OUT F(R) OUT R(F) 0V Fig. 3 The level shift circuit converts the pre-stage amplifier output (centered on the bias level and impressed on pins 23 and 25) to positive and negative amplitudes centered on VREF. The level shift circuit's output is BTL-output from the buffer amplifier. Because of the high input impedance, the IC is designed to accommodate filter comprising attached resistors and capacitors. (Example) For secondary filters 190K Servo output 100K 2.5V Fig. 4 OPERATION NOTES (1) (2) (3) The UTC UA9392 has an internal thermal shutdown circuit. Output current is muted when the chip temperature exceeds 180(typically). The output current can also be muted by lower the mute pin (pin 15) voltage below 0.5V. All four driver output channels are muted during thermal shutdown, muting and a drop in bias pin voltage. No other components are muted. UTC UNISONIC TECHNOLOGIES CO. LTD 6 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT I/O ELECTRICAL CHARACTERISTICS 190K 100K + VIN + RL VOUT + pin 27 pin 23,25 pin 24 1/2 VCC pin 26 CH4 Output Drive 5 4 3 2 1 0 -1 -2 -3 -4 -5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 RL=8 RL=12 UTC UNISONIC TECHNOLOGIES CO. LTD 7 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT 100K pin 3,11,18 100K + VIN + pin 7 VrefOut RL + VOUT pin 1,13,16 - pin 2,12,17 CH1/2/3 Output Drive 5 4 3 2 1 0 -1 -2 -3 -4 -5 -3 RL=8 RL=12 -2 -1 0 1 2 3 UTC UNISONIC TECHNOLOGIES CO. LTD 8 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT Focus Error OUT Forward M 28 27 1 2 Reverse 26 3 4 FOCUS COIL Digital Servo BLED OUT Reverse Forward Tracking Error OUT Reverse Forward Splindle OUT Bias 2.5V MUTE +8V SPLINDLE MOTOR BLED MOTOR M 25 24 23 22 21 20 19 18 17 16 15 UTC UA9392 5 6 7 8 9 10 11 12 13 14 TRACKING COIL UTC UNISONIC TECHNOLOGIES CO. LTD 9 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT VCD PLAYER MOTOR DRIVER CIRCUIT From Digital Servo VC 30 From Digital Servo 100 2 SPLINDLE MOTOR M SP- R149 150K C141 R130 150K +9V C117 1.65nF BLED MOTOR M SLSL+ 81 From Digital Servo SP+ 28 27 26 25 24 23 22 21 20 19 18 17 16 15 UTC UA9392 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C178 0.1 F FOCUS COIL C179 30pF C142 1F C176 30pF TRACKING COIL R103 470K 4 From Digital Servo 5 8 10 From Digital Servo UTC UNISONIC TECHNOLOGIES CO. LTD 10 QW-R109-010,A UTC UA9392 LINEAR INTEGRATED CIRCUIT POWER DISSIPATION Ta=25 mount on 50x50mm2 t=1.0mm paper phenol PCB 3 Pd (W) 2 1 0 25 50 75 100 125 150 Ambient Temperature, Ta () UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO. LTD 11 QW-R109-010,A |
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