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| www.fairchildsemi.com KA3027D2 4-Channel Motor Driver Features * * * * * * 3-Channel Balanced TransformerLess(BTL) driver 1-Channel forward-Reverse control DC motor driver Built-in thermal shutdown circuit Built-in mute circuit Operating supply voltage: 4.5~5.5V Corresponds to 3.3V or 5V DSP Description The KA3027D2 is a monolithic IC, suitable for a 1-ch (forward.reverse) control DC motor driver and a 3-ch motor driver which drives the focus actuator,tracking actuator, and sled motor of a CD-media system. 28-SSOPH-300 Typical Applications * Notebook compact disk ROM (CD-ROM) * Other portable compact disk media Ordering Information Device KA3027D2 Package 28-SSOPH-300 Operating Temp. -35 C ~ 85 C -35 C ~ 85 C KA3027D2TF 28-SSOPH-300 Rev. 1.0.1 February. 2000. (c)2000 Fairchild Semiconductor International 1 1 2 3 4 5 6 7 27 26 25 24 23 22 28 VCC DO4DO4+ VM3,4 PGND1 DO3DO3+ MUTE3 MUTE1,2 REF REV FWD CTL SGND Pin Assignments FIN (GND) KA3027D2 MUTE4 VM1,2 DO2DO2+ PGND2 DO1DO1+ FIN (GND) 2 21 8 9 10 11 12 13 14 IN3 20 19 18 17 16 15 OUT2 IN2.2 IN2.1 OUT1 IN1.2 IN1.1 KA3027D2 KA3027D2 Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name VCC DO4DO4+ VM3, 4 PGND1 DO3DO3+ MUTE4 VM1,2 DO2DO2+ PGND2 DO1DO1+ IN1.1 IN1.2 OUT1 IN2.1 IN2.2 OUT2 IN3 SGND CTL FWD REV REF MUTE1,2 MUTE3 I/O O O O O O O O O I I O I I O I I I I I I I Signal VCC Drive4 Output (-) Drive4 Output (+) BTL CH3, 4 Power VCC CH3, 4 Power Ground Drive3 Output (-) Drive3 Output (+) CH4 Mute BTL CH1, 2 Power VCC Drive2 Output (-) Drive2 Output (+) CH1,2 Power Ground Drive1 Output (-) Drive1 Output (+) OP-AMP CH1 Input (+) OP-AMP CH1 Input (-) OP-AMP CH1 Output OP-AMP CH2 Input (+) OP-AMP CH2 Input (-) OP-AMP CH2 Output OP-AMP CH3 Input Signal Ground Pin Function Description CH4 Motor Speed Control CH4 Forward CH4 Reverse Bias Voltage Input CH1, 2 Mute CH3 Mute 3 KA3027D2 Internal Block Diagram MUTE1,2 MUTE3 SGND OUT2 OUT1 IN2.2 IN2.1 IN1.2 REF 28 MUTE1,2 27 - 26 + 25 24 23 22 21 20 19 18 17 16 15 MUTE3 - LEVEL SHIFT + VM3,4 BTLVM/2 10K + VM3,4 10K - 20K SW MSC + 10K BTLVM/2 10K + 10K VM1,2 MUTE4 TSD 10K BTLVM/2 + - 10K + BTLVM/2 10K + 10K 10K 10K + 10K VM3,4 1 VCC 2 DO4- 3 DO4+ 4 5 PGND1 6 DO3- 7 DO3+ 8 MUTE4 9 VM1,2 10 DO2- 11 DO2+ 12 PGND2 13 DO1- VM3,4 4 DO1+ + + LEVEL SHIFT VM1,2 BTLVM/2 + - - 10K LEVEL SHIFT VM1,2 BTLVM/2 + + 10K - 10K + 10K IN1.1 + 10K 14 FWD REV CTL IN3 KA3027D2 Equivalent Circuits MUTE INPUT POWER OUTPUT 2 8 27 28 50 50K 6 50K 3 7 10 11 13 14 CH3 LEVEL SHIFT INPUT SIGNAL REFERENCE INPUT 10K 21 50 26 50 0.2k ERROR AMP INPUT LOADING CONTROL INPUT 15 18 50 50 16 19 23 50 0.2K ERROR AMP OUTPUT LOADING LOGIC INPUT 17 50 20 24 25 50 30K 30K 5 KA3027D2 Absolute Maximum Ratings (Ta = 25C) Parameter Maximum supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCCmax PD TOPR TSTG Value 7 1.4note -35 ~ +85 -55 ~ +150 Unit V W C C NOTE: 1. When mounted on a 76.2mm x 114mm x 1.57mm PCB (Phenolic resin material). 2. Power dissipation reduces 11.2mW/C for using above Ta = 25C 3. Do not exceed PD and SOA(Safe operating area). Power Dissipation Curve PD (temporary) Pd (mW) 2,000 1,200 400 0 SOA 0 25 50 85 100 125 150 175 Ambient Temperature, Ta (C) Recommended Operating Conditions (Ta = 25oC) Parameter Supply Voltage Symbol VCC Min 4.5 Typ Max 5.5 Unit V 6 KA3027D2 Electrical Characteristics (Unless otherwise specified, Ta = 25 C, VCC = VM1,2 = VM3,4 = 5V) Parameter Quiescent Current CH Mute On Current CH Mute On Voltage CH Mute Off Voltage DRIVE CIRCUIT Input Offset Voltage Output Offset Voltage Maximum Output Voltage1 Maximum Output Voltage2 Closed Loop Voltage Gain1 Closed Loop Voltage Gain2 Ripple Rejection Ratio Slew Rate ERROR OP AMP CIRCUIT Input Offset Voltage Input Bias Current High Level Output Voltage Low Level Output Voltage Output Sink Current Output Source Current Open Loop Voltage Gain Ripple Rejection Ratio Slew Rate Common Mode Rejection Ratio Common Mode Input Range Input High Level Voltage Input Low Level Voltage Output Voltage Output Load Regulation Output Offset Voltage1 Output Offset Voltage2 VOFOP IBOP VOHOP VOLOP ISINK ISOURCE GVO RROP SROP CMRR VICM VIH VIL VO VRL VOO1 VOO2 VIN = 5V, 5V VIN = 0V, 0V VCTL = 3.5V RL = 1K RL = 1K VIN = -75dB, f = 1kHz VIN = -20dB, f = 120Hz f = 120kHz, 2Vp-p VIN = -20dB, f = 1kHz -7 4.5 2 2 -0.3 2 2.8 -10 -10 4.8 0.2 4 4 75 65 1 80 3.5 300 +7 300 0.5 4.5 0.5 4.2 700 +10 +10 mV nA V V mA mA dB dB V/us dB V V V V mV mV mV VIO VOO VOM1 VOM2 GVC1 GVC2 RR SR VIN = 2.5V RL = 8 (CH1, 2) RL = 24 (CH3) f = 1kHz, Vin = 0.1VRMS (CH1, 2) f = 1kHz, Vin = 0.1VRMS (CH3) VIN = 0.1VRMS, f = 120Hz VO = 2VP-P, f = 120kHz -20 -40 2.7 3 10.5 16 3.4 3.8 12 18 60 0.8 +20 +40 13.5 20 mV mV V V dB dB dB V/us Symbol ICC IMUTEch VMONch VMOFFch Vin = 0V Pin27, Pin28, Pin8 = GND Pin27, Pin28, Pin8 = Variation Pin27, Pin28, Pin8 = Variation Conditions Min. 2 Typ. 8 1 Max. 12 3 0.5 Units mA mA V V TRAY DRIVE CIRCUIT(VCC = VM3,4 = 5V, RL = 45) ) 7 KA3027D2 Application Information 1. REFERENCE INPUT Pin 26 (REF) is a reference Input pin. 1) Reference Input The applied voltage at the reference input pin must be between 1.5 (V) and 3.5 (V), when Vcc = 5V. 2. SEPARATED CHANNEL MUTE FUNCTION These pins are used for individual channel mute operation. 1) When the mute pins (pin27, 28 and 8) are Low level, the mute circuits are enabled and the output circuits are muted. 2) When the voltages of the mute pins (pin27, 28 and 8) are High level, the mute circuits are disabled and the output circuits operate normally. 3) If the chip temperature rises above 175 C, then the thermal shutdown (TSD) circuit is activated and the output circuits are muted. Mute1, 2 (pin 27)-CH1, 2 mute control input pin. Mute3 (pin 28)-CH3 mute control input pin. Mute4(pin8) - CH4 mute control input pin. 3. PROTECTION FUNCTION Thermal Shutdown (TSD) 1) If the chip temperature rises above 175 C the thermal shutdown (TSD) circuit is activated and the output circuit is in the Mute state, that is Off state. The TSD circuit has a temperature hysteresis of 25 C. 4. FOCUS, TRACKING ACTUATOR, SLED MOTOR DRIVE CIRCUIT 1) The reference voltage REF is given externally through pin 26. 2) The error amp output signal is amplified by R2/R1 and then fed to the level shift circuit. 3) The level shift circuit produces the differential output voltages and drives the two output power amplifiers. Since the differential gain of the output amplifiers is equal to 2 x (1+ R4/ R3), the output signal of the error amp is amplified by (R2/R1) x 2 x (1+R4/R3). 4) If the total gain is insufficient, the input error amp can be used to increase the gain. 5) The bias voltage (Vr) is about a half of the supply voltage(VM). R4 AP2 M Power Amp R4 -+ Vr R3 +R3 AP3 LEVEL + SNIFT 26 + - AP1 +R1 Vref R2 17 20 21 Error Amp +EA 16 19 Vin 15 18 8 KA3027D2 5. TRAY MOTOR DRIVE CIRCUIT 1) Rotational Direction Control - The forward and reverse rotational direction is controlled by FWD (pin 24) and REV (pin 25) inputs. Conditions are as follows. - Vr(Power reference voltage) is (VM34-VBE) / 2 Input FWD H H L L REV H L H L DO4+ Vr H L Vr Output DO4Vr L H Vr State S. W 3 DO4+ D M 2 DO4D LEVEL SHIFT 23 CTL M. S. C Brake Forward Reverse Brake IN FWD 24 IN REV 25 2) Motor Speed Control - The motor speed is proportional to the differential voltage between the pin3(DO4+) and the pin2(DO4-). - By applying the voltage to the pin23 of CTL, the motor speed can be controlled and it is linearly proportional to the applied control voltage. - When both VM3,4 and Vcc are 5V, and the applied control voltage is higher than 4V, the motor speed is not proportional to the control voltage but the motor speed becomes constant. - If the pin23 is opened, the motor torque becomes maximum. - The maximum output swing is 3.8V, when VM3,4 and Vcc are 5V. 9 KA3027D2 Typical Performance Characteristics ICC (mA) 16 14 12 10 8 8 6 6 4 2 0 4 6 8 10 12 14 4 < VCC & ICC > VOM (V) 14 12 10 < VCC & VOM > CH1 CH2 CH3 Ta=25 VCC=VM12=VM34 2 0 2 5 8 Ta=25 VCC=VM12=VM34 RL1=8ohm (CH1,2) RL2=24ohm(CH3) 11 14 VCC (V) VCC (V) VOUT (V) 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 0.1 0.2 < IOM & VOUT > GVC (dB) 20 18 < VCC & GVC > CH1 Upp. CH1 Low CH2 Upp. CH2 Low CH3 Upp. CH3 Low Ta=25 VCC=VM12=VM34 16 14 12 10 8 6 4 2 0 0.3 0.4 0.5 0.6 0.7 0.8 3 5 7 9 11 13 15 17 19 CH1 CH2 CH3 Ta=25 VCC=VM12=VM34 RL1=8ohm (CH1,2) RL2=24ohm(CH3) IOM (A) VCC (V) Isource (mA) 7 6 5 4 < VCC & Isource (ERROR AMP) > Isink (mA) 16 14 12 10 8 < VCC & Isink (ERROR AMP) > CH1 CH2 3 2 1 0 4 6 8 10 12 14 CH1 CH2 Ta=25 RL=1Kohm 6 4 2 0 4 6 8 10 12 14 Ta=25 RL=1Kohm VCC (V) VCC (V) 10 KA3027D2 Typical Performance Characteristics (Continued) VO (V) 8 7 6 5 4 3 2 1 0 0 < Iload & VO (LOAD REGULATION (TRAY PART) )> VO (V) 12 < CTL & OUTPUT VTG (TRAY PART) > DO4+ DO4- 10 8 6 4 Ta=25 VCC=8V, CTL=3.5V FWD=5V, REV=0V DO4+ FWD=0V, REV=5V DO40.2 0.4 0.6 0.8 1 2 Ta=25 VCC=13V RL=24ohm FWD=5V, REV=0V 0 2 4 6 8 10 12 0 Iload (A) CTL (V) GVC (dB) 21 18 15 12 9 6 3 0 - 40 < TEMP & GVC > < TEMP & OUTPUT VTG (TRAY PART) > VO (V) 10 9 8 7 6 5 CH1 CH2 CH3 4 3 VO1 VO2 VCC=VM34=8V CTL=6.8V VO1 VCC=VM34=13V CTL=9.5V VO2 RL=24ohm - 20 0 20 40 60 80 100 VCC=VM12=VM34=5V RL1=8ohm (CH1,2) RL2=24ohm(CH3) 0 20 40 60 80 100 2 1 0 - 40 - 20 TEMP () TEMP () 11 KA3027D2 Typical Application Circuits 1 (Differential PWM Control Mode) VCC 1 VCC MUTE3 28 MUTE1,2 27 REF 26 REV 25 FWD 24 CTL 23 5V SGND 22 SLED MUTE FOCUS, TRACKING MUTE BIAS VOLTAGE CONTROL (TRAY) FORWARD REVERSE 2 DO4TRAY MOTOR 3 DO4+ 5V 4 VM3,4 5 PGND1 6 DO3SLED MOTOR 7 DO3+ KA3027D2 TRAY MUTE 8 MUTE4 9 VM1,2 5V 10 DO2TRACKING ACTUATOR 11 DO2+ 12 PGND2 13 DO114 DO1+ IN2.2 19 BIAS IN2.1 18 OUT1 17 IN1.2 16 BIAS IN1.1 15 PWM2 PWM1 FOCUS SERVO AMP PWM2 PWM1 TRACKING SLED IN3 21 OUT2 20 FOCUS ACTUATOR Thermal Shut Down Circuit The IC over heats above 175C and fails when overload condition continues for a long time. So, KA3027D2 has a thermal shut down circuit to prevent this conditon. 12 KA3027D2 Typical Application Circuits 2 (Voltage Control Mode) VCC 1 VCC MUTE3 28 MUTE1,2 27 REF 26 REV 25 FWD 24 CTL 23 5V SGND 22 SLED MUTE FOCUS, TRACKING MUTE BIAS VOLTAGE CONTROL (TRAY) FORWARD REVERSE 2 DO4TRAY MOTOR 3 DO4+ 5V 4 VM3,4 5 PGND1 6 DO3SLED MOTOR 7 DO3+ KA3027D2 TRAY MUTE 8 MUTE4 9 VM1,2 5V 10 DO2TRACKING ACTUATOR 11 DO2+ 12 PGND2 13 DO114 DO1+ IN2.2 19 IN2.1 18 SLED OUT1 17 IN1.2 16 IN1.1 15 REF TRACKING FOCUS SERVO AMP IN3 21 OUT2 20 FOCUS ACTUATOR 13 KA3027D2 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 12/1/00 0.0m 001 Stock#DSxxxxxxxx 2000 Fairchild Semiconductor International 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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