AD6392 4-CH MOTOR DRIVE IC DESCRIPTIONS AD6392 is a 4-CH BTL driver suitable for driving motors and actuators in CD-P/VCD-P systems. Each channel drivers except the spindle driver have an internal primary filter and they can be directly connected to the servo’s PWM output without any attached external components. 28SSOPH-375B FEATURES ORDER INFORMATION - 3-CH BTL driver compatible with PWM input (PWM input is filtered by an internal primary filter, so there is no need to attach external components) - 1-CH BTL spindle driver with analog input - Built-in TSD (thermal shut down) circuit. - Built-in mute circuit. - Operating supply voltage (4.5V~13.2V). Device Package Operating Temp AD6392 28SSOPH-375A -35OC ~ +85OC AD6392 28SSOPH-375B -35OC ~ +85OC BLOCK DIAGRAM PGND DO4F DO4R 28 27 26 VBINA VSIN VBIN VCC2 24 23 22 25 PGND VCC1 IN3F IN3R RCIN3 21 20 19 18 DO3R DO3F 17 16 MUTE 15 BIAS REV 100K FWD 150K INTERFACE 190K LEVEL SHIFT MUTE TSD 1 DO1F 2 DO1R April. 2002 (Rev.0) FWD 3 4 5 6 7 RCIN1 IN1R IN1F REFI REFO PGND REV INTERFACE FWD REV INTERFACE 8 9 10 11 12 13 SGND IN2F IN2R RCIN2 DO2R DO2F www.interpionsemi.com 14 PGND1 -1- AD6392 4-CH MOTOR DRIVE IC PIN CONNECTIONS AD6392 PIN DESCRIPTIONS NO 1 2 SYMBOL DO1F DO1R I/O DESCRIPTION O CH1 forward output O CH1 reverse output 3 RCIN1 I CH1 external capacitor / resistor 4 IN1R I CH1 reverse input 5 IN1F I CH1 forward input 6 REFI I Reference input Reference output 7 REFO O 8 SGND - Signal ground 9 IN2F I CH2 forward input 10 IN2R I CH2 reverse input 11 RCIN2 I CH2 external capacitor / resistor 12 DO2R O CH2 reverse output 13 DO2F O CH2 forward output 14 PGND1 - Power ground 1 April. 2002 (Rev.0) NO SYMBOL I/O 15 MUTE I Mute 16 DO3F O CH3 forward output 17 DO3R O CH3 reverse output 18 RCIN3 I CH3 external capacitor / resistor 19 IN3R I CH3 reverse input 20 IN3F I CH3 forward input 21 VCC1 - Power supple voltage 1 22 VCC2 - Power supple voltage 2 23 VBIN I 24 VSIN I CH4 input 25 VBINA I CH4 bias input (with internal resistor) 26 DO4R O CH4 reverse output 27 DO4F O CH4 forward output 28 PGND2 - Power ground 2 www.interpionsemi.com DESCRIPTION CH4 bias input -2- AD6392 4-CH MOTOR DRIVE IC ABSOLUTE MAXIMUM RATINGS CHARACTERISTICS SYMBOL VALUE UNIT Maximum supply voltage VCCmax 18 V Power dissipation 1 (375A_Type) Pd 1 1.7 * W Power dissipation 2 (375B_Type) Pd 2 2.3 * W Operating temperature Topr -35 ~ +85 O Storage temperature Tstg -55 ~ 150 O C C Note> 1. When mounted on 100mm X 100mm X 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6 mW/OC(375A_Type), 18.4 mW/OC(375B_Type), for using above Ta=25OC 3. Do not exceed Pd and SOA. Power Dissipation (W) POWER DISSIPATION CURVE 3 375B_Type 2 375A_Type 1 0 25 50 75 100 125 150 175 Ambient Temperature (°C) RECOMMENDED OPERATING CONDITIONS CHARACTERISTICS SYMBOL VALUE UNIT Operating Supply Voltage VCC1,2 4.5~ 13.2 V April. 2002 (Rev.0) www.interpionsemi.com -3- AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS (VCC1=VCC2=8V, f = 1kHz, RL = 8ohm, Ta = 25OC unless otherwise specified.) CHARACTERISTICS SYMBOL CONDITIONS MIN TYP MAX UNIT Icc No Load - 6.5 - mA PREFO Pin Voltage Vbias - 3.40 3.70 4.00 V PREFO Pin Voltage Variance Vbias 1mA Source, sink -30 - 30 mV All Mute On Voltage Vamon Pin6=variation - - 0.5 V All Mute Off Voltage Vamoff Pin6=variation 2.0 - - V Mute On Voltage Vmon Pin15=variation - - 0.5 V Mute Off Voltage Vmoff Pin15=variation 2.0 - - V Mute on current Imute - - - 3 mA Input High Level Voltage Vih - 2.4 - - V Input Low Level Voltage Vil - - - 0.5 V Input High Level Current lih Vin = 5V 50 100 150 uA Input Low Level Current lil Vin = 5V - 0 - uA -40 - +40 mV Quiescent Circuit Current [ DRIVE PART (CH1,CH2,CH3) ] Output Offset Voltage 1,2,3 Voo Output High Level Voltage Vohd FWD = 5V, REV = 0V 5.2 5.8 - V Output Low Level Voltage Vold FWD = 0V, REV = 5V - 1.1 1.6 V Constant Current - Iconst - 14 22 30 uA Internal integral Capacitance C - - 24 - pF Current Pulse rise time 1 tr At startup - 0.08 1 us Current Pulse fall time 2 tf At shutdown - 0.55 1 us -160 - 160 us Current Pulse time differential tr-f - Drive Linearity LIN Vin = Vref±0.5, 1, 1.5V*1 90 100 110 % Ripple Rejection RR Vin = 100mVrms, 100Hz - 70 - dB *1. 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% April. 2002 (Rev.0) www.interpionsemi.com -4- AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS (VCC1=VCC2=8V, f = 1kHz, RL = 8ohm, Ta = 25OC unless otherwise specified.) [ DRIVE PART (CH4) ] Input Bias Current lb - - - 300 nA Common mode input range Vicm - 1.6 - 6.4 V Maximum Output Voltage High Vohs - 5.2 5.8 - V Maximum Output Voltage Low Vols - - 1.1 1.6 V Voltage Gain Gvc - 8 10.5 13 dB Output offset voltage 4 Voos - -60 0 60 mV Slew Rate SR - - 2 - V/us Ripple Rejection Ratio RRs - 70 - dB April. 2002 (Rev.0) Vin = 100mVrms, 100Hz www.interpionsemi.com -5- AD6392 4-CH MOTOR DRIVE IC APPLICATION SUMMARY - Mute function through power reference or signal reference pins Muting all channel drivers can be obtained through power reference or signal reference pins. Fig.1 shows the simplified schematic diagram for power/signal reference mute. Fig. 1 Power reference, Signal reference & all mute function Pin6, Pin23, Pin25 Mute Above 1.0V off Below 1.0V on April. 2002 (Rev.0) As it can be seen in Fig. 1, pin6, pin23 and pin25 are connected to the positive input terminals of comparators, and the internal 1.0V reference is connected to the negative input terminals. Thus, if the voltage applied to each pins falls below 1.0V, Q1 and Q2 become on and hence the bias currents for all channel drivers become to be shut down. Thus all mute function can be carried out. www.interpionsemi.com -6- AD6392 4-CH MOTOR DRIVE IC APPLICATION SUMMARY (Continued) - Mute function through MUTE pin Mute function is also performed at MUTE pin (pin15). The logic is as followers: Pin15 Mute High off Low on As it can be seen in Fig. 2, If the voltage of the pin15 become low (below 0.5V) or open, Q3 becomes off and Q4 on, and hence the bias currents for all channel drivers are shut down and muted. If the voltage of the pin15 become high (above 2.0V), the channel drivers operate normally. Fig. 2 Mute function - Thermal shutdown (TSD) The AD6392 has a thermal protection against the abnormal high temperature operation to protect the chip. Fig. 3 Thermal shut down April. 2002 (Rev.0) Temperature mute Above 175 OC on Falls below 150 OC off Hysteresis 25 OC Q5 is biased through the resistor string from the internal bandgap reference voltage so that it remains in off state at the ranges of the normal operating temperatures. If the junction temperature rises above 175OC, Q5 turns into on state and hence Q7 turns on, and all channel drivers are muted as the bias currents are shut down. When the junction temperature falls below 150 O C, Q5 and Q7 are turned off and the drivers operate normally. The hysteresis temperature is, thus, 25 OC www.interpionsemi.com -7- AD6392 4-CH MOTOR DRIVE IC APPLICATION SUMMARY (Continued) - CH1,CH2 and CH3 Drive Parts (Focus, Tracking , Sled Drivers) CH1, CH2 and CH3 drive parts are composed of internal filter, V-I converter and output power amplifiers. Internal filter V-I converter Output Power AMP Fig. 4 CH1, CH2 and CH3 drive parts - Internal primary filter Internal primary filter is composed of sourcing/sinking current source of 22uA and forward/reverse controlled switches. It converts “FWD/REV” digital signals to analog signal as shown in Fig. 5. Fig. 5 Output signal waveforms of the primary filter - V-I converter V-I converter converts filtered analog voltage signal to positive or negative steering current signals and delivers them to output power amplifiers. - Output power amplifier Output power amplifiers with a unity feedback configuration re-convert the current outputs of V-I converters to differential output voltage to drive motors in BTL mode. April. 2002 (Rev.0) www.interpionsemi.com -8- AD6392 4-CH MOTOR DRIVE IC APPLICATION SUMMARY (Continued) Input waveform (digital servo output). (Pin4,5,9,10,19,20) Output waveform at internal filter(RCIN). (Pin3,11,18) Final output waveform. (Pin1,2,12,13,26,27) Fig. 6 Operation waveforms of CH1, CH2 and CH3 drive parts - Operation principle If FWD is high and REV is low, then SW_FWD and SW_REV become on and off, respectively. This causes the internal capacitor to be charged with sourcing current of 22 uA and consequently the voltage of the filter output (RCIN) increases with the internal time constant of 2.4usec (time constant = R*C=24 pF * 100 Kohm =2.4usec). Then the output current of V-I converter is given by di= VRCIN 100 K The output voltages of power amplifiers are, then, given as: DOF = Pref + RCIN DOR = Pref − RCIN April. 2002 (Rev.0) www.interpionsemi.com -9- AD6392 4-CH MOTOR DRIVE IC APPLICATION SUMMARY (Continued) - CH4 spindle drive part CH4 drive part is composed V-I converter and output power amplifiers. V-I converter Output Power AMP Fig. 7 CH4 spindle drive part - The V-I converter converts the input voltage applied to pin24 into a incremental output current given by di = Vin - Vref Vin = 100K 100K Vin = Vin - Vref * Vin = input voltage of pin24 *Vref = reference voltage (pin23 or pin25) - These sourcing and sinking output current from V-I converter are delivered to output power amplifiers, where they are appeared as differential output voltages given as: DOF = Pref + di *170K DOR = Pref − di *170K - The differential voltage gain is, then, calculated as follows: Vout = DOF - DOR = 2 * di *170K Avf = 20log April. 2002 (Rev.0) DVout 2 * 170K = 20log = 10.6dB DVin 100K www.interpionsemi.com - 10 - AD6392 4-CH MOTOR DRIVE IC TEST CIRCUIT April. 2002 (Rev.0) www.interpionsemi.com - 11 - AD6392 4-CH MOTOR DRIVE IC TYPICAL APPLICATION CIRCUIT 28 27 26 3 25 4 24 5 23 6 22 7 PGND REFO PGND 21 20 VCC1 IN3F 8 9 SGND IN2F AD6392 PGND2 DO4F DO4R VBINA VSIN VBIN VCC2 2 DO1F DO1R RCIN1 IN1R IN1F REFI 1 19 18 17 16 15 IN3R RCIN3 DO3R DO3F MUTE 11 12 13 14 IN2R RCIN2 DO2R DO2F PGND1 10 - 12 - www.interpionsemi.com April. 2002 (Rev.0) AD6392 4-CH MOTOR DRIVE IC INTERNAL CIRCUIT Pin no 1,2, 12,13, 16,17, 26,27 3, 11, 18 April. 2002 (Rev.0) Pin name Internal circuit DO1F, DO1R, DO2R, DO2F, DO3F, DO3R, DO4R, DO4F RCIN1, RCIN2, RCIN3 www.interpionsemi.com - 13 - AD6392 4-CH MOTOR DRIVE IC INTERNAL CIRCUIT (Continued) Pin no 4,5, 9,10, 19,20 6 April. 2002 (Rev.0) Pin name Internal circuit IN1R, IN1F, IN2F, IN2R, IN3R, IN3F PREFI www.interpionsemi.com - 14 - AD6392 4-CH MOTOR DRIVE IC INTERNAL CIRCUIT (Continued) Pin no Pin name 15 MUTE Internal circuit 22 23, 24, 25 VBIN, VSIN, VBINA Vcc2 23 15 150k 25 15 24 15 100k April. 2002 (Rev.0) www.interpionsemi.com - 15 - AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS CURVES Vin vs Vout (CH4) Vout (V) 6 RL=25 ohm 5 RL=8 ohm 4 RL=4 ohm 3 VCC=8.0V Vref=2.5V Vin=sweep RL=Change Mute=high 2 1 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Vin (V) Vin vs Vout (CH1,2,3,) Vout (V) 6 RL=25 ohm 5 RL=8 ohm 4 RL=4 ohm 3 VCC=8.0V Vref=2.5V VRCIN=sweep RL=Change Mute=high 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Vin (V) April. 2002 (Rev.0) www.interpionsemi.com - 16 - AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS CURVES (Continued) Vcc vs Vout (CH1,2,3,) Vout (V) 7 6 5 RL=open 4 VCC=Sweep Vref=2.5V FWD=Low REV=High RL=Change Mute=high RL=8 ohm 3 2 1 0 0 2 4 ICC (mA) 6 8 Vcc (V) 10 12 14 16 Vcc vs ICC 10 9 8 7 VCC=Sweep Vref=2.5V FWD=open REV=open RL=open Mute=high 6 5 4 4 6 8 10 12 14 16 Vcc (V) April. 2002 (Rev.0) www.interpionsemi.com - 17 - AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS CURVES (Continued) Imute (mA) Vcc vs Imute 2.2 2.1 2.0 VCC=Sweep Vref=2.5V FWD=open REV=open RL=open Mute=Low 1.9 1.8 1.7 1.6 4 6 8 10 12 14 16 Vcc (V) Duty vs Vout Vout (V) 3.0 VCC=8.0V Vref=2.5V FWD=Low REV=pulse (0V,5V,50kHz) RL=open Mute=High 2.5 2.0 1.5 1.0 0.5 0.0 0 10 20 30 40 50 Duty (%) April. 2002 (Rev.0) www.interpionsemi.com - 18 - AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS CURVES (Continued) Vcc vs Avf Avf (dB) 12 11 10 9 VCC=8.0V Vref=2.5V Vin=0.2Vrms, 1KHz RL=8 ohm Mute=High 8 7 6 4 6 8 10 12 14 16 Vcc (V) Temp vs Icc Icc (mA) 8 7 6 5 4 VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=High 3 2 1 0 -40 -20 0 20 40 60 80 100 Temperature April. 2002 (Rev.0) www.interpionsemi.com - 19 - AD6392 4-CH MOTOR DRIVE IC ELECTRICAL CHARACTERISTICS CURVES (Continued) Temp vs Imute Icc (mA) 3.0 2.5 2.0 1.5 VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=Low 1.0 0.5 0.0 -40 -20 0 20 40 60 80 100 Temperature Temp vs Avf Avf (dB) 12.0 11.5 11.0 10.5 10.0 VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=High 9.5 9.0 8.5 8.0 -40 -20 0 20 40 60 80 100 Temperature April. 2002 (Rev.0) www.interpionsemi.com - 20 - AD6392 4-CH MOTOR DRIVE IC [ 28SSOPH_375A_Type ] April. 2002 (Rev.0) www.interpionsemi.com - 21 - AD6392 4-CH MOTOR DRIVE IC PACKAGE DIMENSION [ 28SSOPH_375B_Type ] April. 2002 (Rev.0) www.interpionsemi.com - 22 -