SA6392 4-CHANNEL BTL DRIVER FOR CD PLAYERS DESCRIPTION The SA6392 is a monolithic integrated circuit, and suitable for 4-CH motor driver, It has an internal primary filter, and can be directly connected to the servo PWM output of all drivers other than the spindle driver. FEATURES * 4-channel BTL driver on a HSOP 28-pin power package, allowing for application miniaturization. * 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 constants can also be changed with attached components. * Built in thermal shutdown circuit * Built in mute function ORDERING INFORMATION Part No. Package SA6392 HSOP-28-375-0.8 APPLICATION CD players, CD-ROM drives BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 1 of 9 SA6392 ABSOLUTE MAXIMUM RATING (Tamb=25°C) Characteristic Symbol Value Unit Power Supply Voltage VCC 18 V Power Dissipation PD 1.7* W Operating Temperature Topr -30~+85 °C Storage Temperature Tstg -55~+150 °C *: Reduced by 13.6mW for each increase in Tamb of 1°C over 25°C. When mounted on a 50 x 50 x 1.0 mm phenol paper PCB. RECOMMENDED OPERATING CONDITIONS (Tamb=25°C) Characteristics Power Supply Voltage Symbol Value Unit VCC 6~16* V * Set the power supply voltage according to power dissipation. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Tamb=25°C, VCC=8V, f=1KHz, RL=8Ω) Characteristics Quiescent Current Bias Pin Voltage Bias Pin Voltage Variance Symbol IQ Test Condition No load VBIAS VBIAS 1mA source, sink Min. Typ. Max. Unit 8 13 18 mA 3.4 3.70 4.00 V -30 -- 30 mV Mute-off Voltage VMON 2.0 -- -- V Mute-on Voltage VMOFF -- -- 0.5 V Input High Level Voltage VIH 2.4 -- -- V Input Low Level Voltage VIL -- -- 0.5 V Input High Level Current IIH VIN=5V 170 310 450 µA Input Low Level Current IIL VIN=0V -10 -- 0 µA Drivers Other than Spindle Output Voltage, Offset VOO (same for spindle) -30 -- 30 mV Output High Level Voltage VOHD FIN=5V, RIN=0V 5.2 5.6 -- V Output Low Level Voltage VOLD FIN=0V, RIN=5V -- 1.3 1.6 V ICONST 14 22 30 µA C -- 24 -- pF Constant Current Internal Integral Capacitance Current Pulse Rise Time 1 tr At startup -- 0.08 1 µs Current Pulse Fall Time 2 tf At shutdown -- 0.55 1 µs Current Pulse Time Differential tr-f -160 -- 160 µs Drive Linearity LIN VIN=VREF±0.5, 1, 1.5V * 90 100 110 % Ripple Rejection RR VIN=100mVrms, 100Hz -- 70 -- dB (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 2 of 9 SA6392 (Continued) Characteristics Symbol Test Condition Min. Typ. Max. Unit Spindle Driver Input Bias Current IB -- 10 300 nA Synchronous Input Voltage VICM 1.6 -- 6.4 V Output Voltage High VOHD 5.2 5.6 -- V Output Voltage Low VOLD -- 1.3 1.55 V Voltage Gain GVC 8.0 10.5 13.0 dB Slew Rate SR -- 2 -- V/µs Ripple Rejection RRS -- 70 -- dB VIN=100Vrms, 100Hz Not designed for radiation resistance. * If VO=VO1 when VIN=VREF±0.5V, VO=VO2 when VIN=VREF±1.0V, and VO=V3 when VIN=VREF±1.5V, then LIN=(VO3-VO2)/(VO2 • VO1) x100% PIN CONFIGURATION PIN DESCRIPTION Pin no Symbol Description 1 OUT1F Driver channel 1 forward output 2 OUT1R Driver channel 1 reverse output 3 IN1RC Connect to attached resistor/capacitor (1) 4 IN1R Driver channel 1 reverse input 5 IN1F Driver channel 1 forward input 6 VREF IN Internal reference amplifier input 7 VREF OUT Internal reference amplifier output 8 GND Ground for internal reference and internal power circuit 9 IN2F Driver channel 2 forward input (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 3 of 9 SA6392 (Continued) Pin no Symbol Description 10 IN2R Driver channel 2 reverse input 11 IN2RC Connect to attached resistor/capacitor (2) 12 OUT2R Driver channel 2 reverse output 13 OUT2F Driver channel 2 forward output 14 GND Ground 15 MUTE Driver mute control input 16 OUT3F Driver channel 3 forward output 17 OUT3R Driver channel 3 reverse output 18 IN3RC Connect to attached resistor/capacitor (3) 19 IN3R Driver channel 3 reverse input 20 IN3F Driver channel 3 forward input 21 VCC Power supply 22 VCC Power supply 23 INB Driver channel 4 bias input* 24 INS Driver channel 4 input 25 INB Driver channel 4 bias input* 26 OUT4R Driver channel 4 reverse output 27 OUT4F Driver channel 4 forward output 28 GND Ground * Pin 23 and pin 25 shorted internally. FUNCTION DESCRIPTION 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 is 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). Fig.1 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 4 of 9 SA6392 Fig.2 To maintain the HIGH level with forward (or reverse) in-put, the DC voltage generated at point A is: I1 x R ≈ 2.5V (reverse: - 2.5V) This is the voltage generated relative VREF. The setting is such that a voltage differential of 5V is generated between output pins. The time constant is: RxC = 2.4µ sec This can be increased by inserting a capacitor between point A (pins 3, 11 and 18) and VREF. The constant current (Iconst) given in the electrical characteristics refers to I1 and I2 in Fig. 2. F R SW1 SW2 L L OFF OFF L H OFF ON H L ON OFF H H OFF OFF H… 2.4V Max. L… 0.5V Min. Fig.3 (2) CH4 driver (spindle driver) Pins 23 and 25 are shorted inside the IC. Bias amplitudes are the primary type of inputs assumed. 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 a filter comprising attached resistors and capacitors. OPERATION NOTES (1) The SA6392 has an internal thermal shutdown circuit. Output current is muted when the chip temperature exceeds 180°C (typically). (2) The output current can also be muted by lowering the mute pin (pin 15) voltage below 0.5V. (3) All four driver output channels are muted during thermal shutdown, muting and a drop in bias pin voltage. No other components are muted. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 5 of 9 SA6392 (4) If CH2 is the motor tracking channel, it should be connect a capacitor (0.1µF) between pin12 and pin 13. It suit to more laser tape equipments. ELECTRICAL CHARACTERISTICS CURVES AND TEST CIRCUIT Fig.4 Spindle driver (CH4) I/O characteristics (load variation) Fig.5 I/O characteristics of driver stages CH1-CH3 6 When DC input from RC pin RL=26 RL=12 5 4 RL=8 3 2 100K 1 VCC=8V RCIN -5 -4 -3 -2 -1 -1 0 1 2 3 4 5 V -2 -3 VOUT V RIL VIN -4 -5 -6 Input Voltage :VIN (V) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 6 of 9 SA6392 Fig.6 I/O characteristics with pulse input (drivers CH1-CH3) Fig.7 Driver CH1-CH3 power supply voltage vs. output voltage HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 7 of 9 SA6392 PACKAGE OUTLINE HSOP-28-375-0.8 UNIT: mm 0.8 5.15±0.10 0.35 0.25±0.1 18.05±0.20 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 8 of 9 SA6392 ATTACHMENT Revision History Data REV Description Page 2003.03.21 1.0 Original 2003.04.16 2.0 “SA5692”change to “SA6392”. 2003.11.13 2.1 Modify the “Operation notes” 5 2004.02.12 2.2 Modify the “Operation notes” 5 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:2.2 2004.02.12 Page 9 of 9