UNISONIC TECHNOLOGIES CO., UA1538 LINEAR INTEGRATED CIRCUIT 4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS DESCRIPTION The UTC UA1538 contains a 4ch H bridge driver and DC-DC converter control circuit on one chip, and was developed for use in portable CD players. FEATURES *Built-in 4ch H bridge driver, and PWM control of load drive voltage is made possible by external components. *DC-DC converter control circuit on chip. *With reset output inversion output pin. *Empty detection level can be switched between rechargeable battery and dry battery. *Constant current charging; current value can be varied using external resistor. *Built-in power transistor for charging. *Built-in independent thermal shutdown circuit. QFP-44-0.8 *Pb-free plating product number: UA1538L ORDERING INFORMATION Ordering Number Normal Lead Free Plating UA1538-QM1-T UA1538L-QM1-T www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Package Packing QFP-44-0.8 Tube 1 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION RCHG OUT1R OUT1F OUT2R OUT2F 33 32 31 30 29 POW GND 28 OUT3F OUT3R OUT4F OUT4R BRAKE1 27 26 25 24 23 AMUTE 34 22 IN1 EMP 35 21 MUTE2 HVc c 36 20 IN2 PSW 37 19 MUTE34 CL K 38 18 IN4 17 IN3 16 Vref UTC UA1538 START 39 OFF 40 CHGVcc 41 15 VSYS2 OP + SEL 42 14 PREGND 43 13 OPOUT PWMFIL 12 VSYS1 44 1 2 BSEN BATT 3 4 RESET DEAD 5 6 7 8 SW EO EI SPRT 9 10 11 CT N.C. OP- PIN DESCRIPTION PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT 1 71kΩ 10.5kΩ 1 BSEN Input 16.5kΩ 20 kΩ Battery Voltage Monitor 14.85kΩ 2 BATT Input Battery Power Supply Input Power Supply VSYS1 90kΩ 3 RESET Output 3 Reset Detect Output 13kΩ 4 DEAD Input 4 DEAD Time Setting 49kΩ 30.8kΩ BATT 5 SW Output Transistor Drive For Voltage Multiplier UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 150Ω 6kΩ 2 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT VSYS1 6 EO Output Error Amplifier Output 6 VSYS1 35kΩ 7 EI Input 7 Error Amplifier Input 21.6kΩ VSYS1 8 SPRT Output 8 Short Circuit Protection Setting 220kΩ BATT VSYS1 2kΩ 9 9 CT Output Triangular-Wave Output 420kΩ 10kΩ 10 N.C. 14 11 14 OPOP+ Input Op Amp Negative Input Op Amp Positive Input 12 VSYS1 Input Control Circuit Power Supply Input 11 Control Circuit Power Supply VSYS1 13 OPOUT Output 15 VSYS2 Input 13 Op Amp Output Driver Pre-step Power Supply Pre-Drive Power Supply ×4 16 16 Vref Input 24kΩ Reference Voltage Input 200Ω 50kΩ 17 18 20 22 IN3 IN4 IN2 IN1 Input Ch3 Control Signal Input Ch4 Control Signal Input Ch2 Control Signal Input Ch1 Control Signal Input 11kΩ 17 18 20PIN=7.5kΩ 20 22 19 21 23 MUTE34 MUTE2 BRAKE1 Input Ch3 and 4 Mute Ch2 Mute Ch1 Brake UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 68kΩ 19 21 68kΩ 23 3 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT PIN NO. PIN NAME INPUT/OUTPUT FUNCTION Ch4 Negative Output OUT4R 24 Ch4 Positive Output OUT4F 25 Ch3 Negative Output OUT3R 26 Ch3 Positive Output OUT3F 27 Output Ch2 Positive Output OUT2F 29 Ch2 Negative Output OUT2R 30 Ch1 Positive Output OUT1F 31 Ch1 Negative Output OUT1R 32 Power Block Power Supply 28 POWGND Ground 36 HVcc Input H-Bridge Power Supply Input INTERMAL EQUIVALENT CIRCUIT 36 24 25 26 27 30 29 32 31 28 950Ω 33 RCHG Input 33 Charge Current Setting BATT 34 AMUTE Output 34 Reset Invert Output 95kΩ 35 35 EMP Output Empty Detect Output BATT 37 37 PSW Output PWM Transistor Drive 50Ω External Clock Synchronizing Input VSYS1 2kΩ 38 38 CLK Input 50kΩ 100kΩ Voltage Multiplier DC-DC Converter Start 39 START 390kΩ 39 Input BATT 200kΩ VSYS1 180kΩ 40 OFF Input Voltage Multiplier Converter OFF 41 CHGVcc Input Charging Circuit Power Supply Input UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw DC-DC 40 27kΩ Charging Circuit Power Supply 4 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT BATT 200kΩ 130kΩ 42 SEL Input/Output 43 PREGND Empty Detect Level Switch Pre Section Ground Power 15kΩ 42 Supply Pre Section Power Supply Ground VSYS1 2kΩ 44 PWMFIL Input 44 PWM Phase Compensation 2kΩ *The positive and negative outputs are the polarity with respect to the input BLOCK DIAGRAM RCHG OUTIR OUT1F OUT2R 33 32 31 30 OUT2F POWGND OUT3F 29 28 27 OUT3R OUT4F OUT4R BRAKE1 26 25 24 23 BRAKE1 22 IN1 MUTE2 AMUTE 34 EMP 35 BTL BTL BTL TSD PSW 37 MAXIMUM DETECTION CLK 38 CLK + - POWER OFF STARTER START 39 OFF 40 20 IN2 V / I + V / I + V / I + V / I + MUTE34 BTL HVcc 36 21 MUTE2 19 MUTE34 18 IN4 17 IN3 16 Vref OVER-VOLTAGE CHGVcc 41 TSD 15 VSYS2 TRIANGLE WAVE CONTROL CIRCUIT POWER SUPPLY PRE-DRIVER POWER SUPPLY - + + - 43 + - POWER UNIT POWER SUPPLY + + - PWMFIL 44 13 OPOUT - PREGND 14 OP+ + SEL 42 12 VSYS1 + - 1 2 3 4 5 6 7 8 9 10 11 BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER SYMBOL RATINGS Supply Voltage Vcc *1 13.5 Driver Output Current Io 500 Power Dissipation PD 625 Operating Temperature TOPR 0 ~ +70 Storage Temperature TSTG -40 ~ +150 *1: Vcc shows input voltage of VSYS1,VSYS2, HVcc, BATT,and CHGVcc. UNIT V mA mW °C °C RECOMMENDED OPERATING CONDITIONS PARAMETER Control Circuit Power Supply Voltage Pre-Driver Circuit Power Supply Voltage H-Bridge Power Supply Voltage Power Supply Voltage Charging circuit Power supply Voltage Operating Temperature SYMBOL VSYS1 VSYS2 HVcc BATT CHGVcc Ta MIN 2.7 2.7 1.5 3.0 -10 TYP 3.2 3.2 PWM 2.4 4.5 25 MAX 5.5 5.5 BATT 8.0 8.0 70 UNIT V V V V V °C ELECTRICAL CHARACTERISTICS (Ta=25℃, BATT=2.4V, VSYS1=VSYS2=3.2V, Vref=1.6V, CHGVcc=0V, fCLK=88.2kHz, unless otherwise specified.) PARAMETER Common Section BATT Stand-by Current SYMBOL IST BATT Supply Current (No load) IBAT VSYS1 Supply Current (No load) ISYS1 VSYS2 Supply Current (No load) CHGVcc Supply Current (No load) H-Bridge Driver Part Voltage Gain ch1,ch3.ch4 Voltage Gain ch2 Gain Error By Polarity Input pin resistance ch1,ch3,ch4 Input pin resistance ch2 Maximum Output Voltage Saturation Voltage (Lower) Saturation Voltage (Upper) Input Offset Voltage Output Offset Voltage ch1,ch3,ch4 Output Offset Voltage ch2 Dead Zone BRAKE1ON Threshold Voltage BRAKE1OFF Threshold Voltage MUTE2 ON Threshold Voltage H-Bridge Driver Part MUTE2 OFF Threshold Voltage MUTE34 ON Threshold Voltage MUTE34 OFF Threshold Voltage Vref ON Threshold Voltage ISYS2 ICGVCC GVC134 GVC2 ⊿GVC RIN134 RIN2 VOUT VsatL VsatU VOI VOO134 VOO2 VDB VBRON VBROFF VM2ON VM2OFF VM34ON VM34OFF VrefON TEST CONDITIONS TYP MAX UNIT 0 3 μA 2.5 4.0 mA 4.5 mA 4.1 0.65 5.5 2.00 mA mA 12 21.5 -2 9 6 14 23.5 0 11 7.5 16 24.5 2 13 9 dB dB dB kΩ kΩ 1.9 2.1 BATT=9.0V, VSYS1=VSYS2=Vref=0V HVcc=0.45V, MUTE34=3.2V HVcc=0.45V, MUTE34=3.2V, EI=0V HVcc=0.45V, MUTE34=3.2V CHGVCC=4.5V, ROUT=OPEN IN=1.7V and 1.8V IN=1.7V and 1.8V RL=8Ω,HVcc=BATT=4.0V IN=0-3.2V Io=-300mA, IN=0 and 3.2V Io=-300mA, IN=0 and 3.2V Vref=IN=1.6V Vref=IN=1.6V IN1=1.8V IN1=1.8V IN2=1.8V IN2=1.8V IN3=IN4=1.8V IN3=IN4=1.8V IN1=IN2=IN3=IN4=1.8V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN -8 -50 -130 -10 2.0 240 240 0 0 0 0 V 400 400 8 50 130 10 0.8 2.0 0.8 0.8 2.0 1.2 mV mV mV mV mV mV V V V V V V V 6 QW-R109-023,B UA1538 PARAMETER Vref OFF Threshold Voltage BRAKE1 Brake Current PWM Power Supply Driving PSW Sink Current HVcc Level Shift Voltage HVcc Leak Current PWM Amp Transfer Gain DC-DC Converter Error Amp VSYS1 Threshold Voltage EO Pin Output Voltage "H" EO Pin Output Voltage "L" Short Circuit Protection SPRT Pin Voltage EO=H SPRT Pin Current1 OFF=L SPRT Pin Current2 SPRT Pin Current3 Over-Voltage SPRT Pin Impedance SPRT Pin Threshold Voltage Over-Voltage Protection Detect Transistor Driving LINEAR INTEGRATED CIRCUIT SYMBOL TEST CONDITIONS VrefOFF IN1=IN2=IN3=IN4=1.8V Current difference between IBRAKE1 BRAKE pin "H" time and "L" time. IPSW VSHIF GPWM IN1=2.1V IN1=1.8V, HVcc-OUT1F HVcc=9.0V, VSYS1=VSYS2=BATT=0V IN1=1.8V, HVcc=1.2 ~ 1.4V VS1TH VEOH VEOL EI=0.7V, Io=-100µA EI=1.3V, Io=100µA IHLK VSPR ISPR1 ISPR2 ISPR3 RSPR VSPTH VHVPR DSW1 DSW2 DSW3 CT=470pF, EI=0.7V VOFTH EI=1.3V IOFF OFF=0V VSW1H SW Pin Output Voltage2 "H" VSW2H SW Pin Output Voltage2 "L" VSW2L SW Pin Oscillating Frequency1 fSW1 SW Pin Oscillating Frequency2 SW Pin Oscillating Frequency3 fSW2 fSW3 SW Pin Minimum Pulse Width TSWmin OFF Pin Threshold Voltage OFF Pin Bias Current EI=0.7V, CT=0V BSEN Pin Voltage BATT=CT=1.5V, VSYS1=VSYS2=0V, Io=-2mA Starting Time CT=0V, Io=-10mA, EI=0.7V, SPRT=0V CT=2.0V, Io=10mA CT=470pF, VSYS1=VSYS2=0V Starting Time CT=470pF, CLK=0V CT=470pF CT=470pF, EO=0.5V→0.7V Sweep CT=470pF,VSYS1=VSYS2=0V CT=470pF, EI=0.7V, CLK=0V SW Pin Output Voltage1 "H" Pulse Duty Start Max. Pulse Duty At Self-Running Max. Pulse Duty At CLK Synchronization Interface EI=1.3V EI=0.7V EI=1.3V, OFF=0V EI=1.3V, BATT=9.5V START Pin ON Threshold Voltage VSTATH1 VSYS1=VSYS2=0V, CT=2.0V START Pin OFF Threshold Voltage VSTATH2 VSYS1=VSYS2=0V, CT=2.0V START Pin Bias Current CLK Pin Threshold Voltage "H" CLK Pin Threshold Voltage "L" CLK Pin Bias Current ISTART START=0V VCLKTHH VCLKTHL ICLK CLK=3.2V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX 0.8 UNIT V 4 7 10 mA 10 0.35 13 0.45 17 0.55 mA V 0 5 μA 1/60 1/50 1/40 1/kΩ 3.05 1.4 3.20 1.6 3.35 V V V 0.3 6 12 12 175 1.10 8.0 0 10 20 20 220 1.20 8.4 0.1 16 32 32 265 1.30 9.0 V μA μA μA kΩ 0.78 0.98 1.13 V 1.00 1.50 V V V 0.30 0.45 V 65 80 95 kHz 60 70 88.2 82 kHz kHz 0.60 μs 0.01 40 70 50 80 60 90 % % 65 75 85 % 95 VSYS12.0 115 BATT1.0 75 BATT0.3 10 13 2.0 V μA V V 20 16 30 19 0.8 10 μA V V μA 7 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT PARAMETER Dead Time DEAD Pin Impedance DEAD Pin Output Voltage Starter Circuit SYMBOL Starter Switching Voltage VSTNM Starter Switching Hysteresis Width Discharge Release Empty Detection EMP Detection Voltage 1 EMP Detection Voltage 2 EMP Detection Hysteresis Voltage 1 EMP Detection Hysteresis Voltage 2 EMP Pin Output Voltage EMP Pin Output Leak Current BSEN Pin Input Resistance VSNHS VDIS VEMPT1 VEMPT2 VEMHS1 VEMHS2 VEMP IEMPL RBSEN BSEN Pin Leak Current IBSENL SEL Pin Detection Voltage VSELTH SEL Pin Detection Current Reset Circuit VSYS1 RESET Threshold Voltage Ratio RESET Detection Hysteresis Width RESET Pin Output Voltage RESET Pin PULL UP Resistance AMUTE Pin Output Voltage 1 AMUTE Pin Output Voltage 2 AMUTE Pin PULL DOWN Resistance Op Amp Input Bias Current Input Offset Voltage High Level Output Voltage Low level Output Voltage Output Drive Current (Source) Output Drive Current (Sink) Open Loop Voltage Gain Slew Rate Battery Charging Circuit RCHG Pin Bias Voltage TEST CONDITIONS RDEAD VDEAD VSYS1=VSYS2=0→3.2V, START=0V START=0V VSEL=0V ISEL=- 2µA VSEL=0V ISEL=- 2µA Io=1mA, BSEN=1V BSEN=2.4V VSEL=0V VSYS1=VSYS2=0V BSEN=4.5V VSELTH=BATT-SEL BSEN=2.0V ISELT HSRT Comparison with error amplifier threshold voltage VRSTHS VRST RRST Io=1mA, VSYS1=VSYS2=2.8V VAMT1 VAMT2 Io=-1mA, VSYS1=VSYS2=2.8V Io=-1mA, START=0V, VSYS1=VSYS2=0V RAMT IBIAS VOIOP VOHOP VOLOP ISOU ISIN GVO SR VRCHG RCHG Pin Output Resistance RRCHG SEL Pin Leak Current 1 ISELLK1 SEL Pin Leak Current 2 ISELLK2 SEL Pin Saturation Voltage VSELCG TYP MAX UNIT 52 0.78 65 0.88 78 0.98 kΩ 2.3 2.5 2.7 V 130 1.63 200 1.83 300 2.03 mV V 2.1 1.7 25 25 2.2 1.8 50 50 17 23 2.3 1.9 100 100 0.5 1.0 27 V V mV mV V μA kΩ 1.0 V RL=OPEN RL=OPEN 50ΩGND 50ΩVSYS1 VIN=-75dBV, f=1kHz CHGVcc=4.5V, RCHG=1.8kΩ. CHGVcc=4.5V, RCHG=0.5 and 0.6V CHGVcc=4.5V, RCHG=OPEN, BATT=4.5V CHGVcc=0.6V, RCHG=1.8kΩ, BATT=4.5V CHGVcc=4.5V, Io=300mA, RCHG=0Ω V 1.5 V -2 μA 85 90 95 % 25 50 72 BATT -0.4 BATT -0.4 90 100 0.5 108 mV V kΩ BATT V BATT V 77 95 113 kΩ -5.5 2.8 0 300 5.5 0.2 -3.0 nA mV V V mA mA dB V/μs OP+=1.6V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 0.4 -6.5 0.7 70 0.5 0.71 0.81 0.91 V 0.75 0.95 1.20 kΩ 1.0 μA 1.0 μA 1.00 V 0.45 8 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT MEASURING CIRCUIT V a 1.8k A A a SW20 V b SW19 B b b V b a SW1 8 a SW1 7 V 51k V V V a SW21 b A 26 25 24 23 BRAKE1 AMUTE F a V 27 IN1 22 SW16 A 28 OUT4R b 29 OUT4F A 34 30 OUT3R SW23 31 OUT3F a 32 POWGND b 47 33 OUT2F SW22 OUT2R R c a OUT1F A 33μ OUTIR 47μ RCHG + b 35 EMP MUTE2 21 36 HVcc IN2 20 37 PSW MUTE34 19 38 CLK IN4 V a A b a V V SW15 SW24 SW14 18 A a A b a SW25 IN3 17 SW13 a A A UTC UA1538 39 START V b b 40 OFF A SW26 Vref 16 VSYS2 15 OP+ 14 A 41 CHGVcc A a 1k A a 42 SEL b + SW27 V b A 100μ V V 11 10k b SW10 10k SW7 b a V A a 10μ d SW11 V 50 c 20k a b SW9 b a 100k a V 1M + 470μ 10 a b UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 SW8 b a A V a b frequency + a SW3 8 SW6 V SW4 SW2 A 7 a A 10p SW1 a 6 SW5 SW12 a OP- 5 N.C 4 Ct 3 SPRT 2 EI 1 EO SW 100 k 2200p DEAD A RESET VSYS1 12 BATT 44 PWMFIL b SW28 BSEN OPOUT 13 A V V a 43 PREGND b 470p V V 9 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT SWITCHING POSITION TABLE ITEM BATT Stand-by Current BATT Supply Current (No load) VSYS1 Supply Current (No load) VSYS2 Supply Current (No load) CHGVcc Supply Current (No load) VSYS1 Threshold Voltage EO Pin Output Voltage “H” EO Pin Output Voltage ”L” SPRT Pin Voltage SPRT Pin Current1 EO=”H” SPRT Pin Current2 OFF=”L” SPRT Pin Current3 Over-Voltage SPRT Pin Impedance SPRT Pin Threshold Voltage Over-Voltage Protection Detect SW Pin Output Voltage1”H” SW Pin Output Voltage2”H” SW Pin Output Voltage2”L” SW Pin Oscillating Frequency 1 SW Pin Oscillating Frequency 2 SW Pin Oscillating Frequency 3 SW Pin Minimum Pulse Width Pulse Duty Start Max Pulse Duty At Self-Running Max Pulse Duty At CLK Synchronization -: Turn off switch ITEM DEAD Pin Impedance DEAD Pin Output Voltage OFF Pin Threshold Voltage OFF Pin Bias Current START Pin ON Threshold Voltage START Pin OFF Threshold Voltage START Pin Bias Current CLK Pin Threshold Voltage “H” CLK Pin Threshold Voltage “L” CLK Pin Bias Current Starter Switching Voltage Starter Switching Hysteresis Width Discharge Release Voltage VSYS1 Pin RESET Threshold Voltage Ratio RESET Detection Hysteresis Width RESET Pin Output Voltage RESET Pin PULL UP Resistance AMUTE Pin Output Voltage 1 AMUTE Pin Output Voltage 2 AMUTE Pin PULL DOWN Resistance -: Turn off switch 1 a a - 4 a a a b b b b b b 5 a a a b - 6 a a a a a a a a a - SW NO. 7 8 a b b b b a a a a b a a b b b b b b - b - a - 2 - 3 b a - 4 a a a a a a - 6 a - SW NO. 7 8 a a a b b a - b - - - - b b a - - - - - UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 22 a a a - 24 b a b b 25 a a a a a a - 26 a - - a - - 20 - 24 b b a - 25 a a a a a - 26 a a - - - - - - - b b a - -a - - b 10 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT ITEM EMP Detection Voltage 1 EMP Detection Voltage 2 EMP Detection Hysteresis Voltage 1 EMP Detection Hysteresis Voltage 2 EMP Pin Output Voltage EMP Pin Output Leak Current BSEN Pin Input Resistance BSEN Pin Leak Current SEL Pin Detection Voltage SEL Pin Detection Current Input Bias Current Input Offset Voltage “H” Level Output Voltage “L” Level Output Voltage Output Drive Current (Source) Output Drive Current (Sink) Open Loop Voltage Gain Slew Rate -: Turn off switch ITEM Voltage Gain Gain Error By Polarity Input Pin resistance Maximum Output Voltage Saturation Voltage (Lower) Saturation Voltage (Upper) Ch1R Ch2R Ch3R Ch4R Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1R Ch2R Ch3R Ch4R Ch1F Ch1R Ch2F Ch2R Ch3F Ch3R Ch4F Ch4R Ch1F Ch1R Ch2F Ch2R Ch3F Ch3R Ch4F Ch4R 1 a a a a a a a a a a - 9 a b a - 10 a d c c d d b d SW NO. 11 b a - 12 a a 21 a a a a b c a a - 27 a b a b a a b - 13 b b b b b b b b - 14 b b b b b b b b 15 b b b b b b b b - SW NO. 16 b b b b b b b b - 17 b b b b b b b b b b b b b b b b a a a a a a a a - 18 b b b b b b b b b b b b b b b b a a a a a a a 22 a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT Input Offset Voltage Output Offset Voltage Dead Zone Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 a b b - a b b a b b - a b b - b b b b b b b b b b b b b b b b a a a a a a a a a a a a -: Turn off switch ITEM BRAKE1 ON Voltage BRAKE1 OFF Voltage MUTE2 ON Voltage MUTE2 OFF Voltage MUTE34 ON Voltage MUTE34 OFF Voltage Vref ON Voltage Vref OFF Voltage BREAK1 Brake Current PWM Sink Current HVcc Level Shift Voltage HVcc Leak Current PWM Amp Transfer Gain Ch1 Ch1 Ch2 Ch2 Ch3 Ch4 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 13 b b b b - 14 b b b b - ITEM CHGSET Pin Bias Voltage CHGSET Pin Output Resistance SEL Pin Leak Current 1 SEL Pin Leak Current 2 SEL Pin Saturation Voltage -: Turn off switch UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 15 b b b b - 16 b b b b b b b b SW NO. 17 b b b b b b b b b b b b b b b b b b b b 18 b b b b b b b b b b b b b b b b b b b b 22 a a a a a a a a a a a a a a a a a a b a a 23 b a - 28 a b - SW NO. 19 a b a b 27 a a b 12 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT Input voltage:VIN (mV) SWITCHING POSITION TABLE VO4 VIN1 VIN2 XC' VO3 XC VO2 Dead Zone VO1 Output Offset Voltage VIN3 VIN4 Output Voltage:Vo (mV) * Voltage Gain Gvc(+)=20 log Gvc(-)=20 log VO1-VO2 VIN1-VIN2 VO3-VO4 VIN3-VIN4 * Gain Error By Polarity Gvc=Gvc (+)-Gvc (-) * Dead Zone VIN2‧VO1 - VIN1‧VO2 XC-XC'= VO1-VO2 - VIN3‧VO4 - VIN4‧VO3 VO3-VO4 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 13 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT 28 27 TRACKING OUT4F 29 OUT3R 30 OUT3F 31 OUT2F 32 OUT2R OUT1F OUTIR RCHG 33 POWGND FOCUS 1.8k 26 25 24 BRAKE1 M SPINDLE OUT4R M TRAVERSE 23 BRAKE1 AMUTE IN1 34 22 MUTE2 EMP 35 BTL 36 + BTL BTL BTL 20 TSD 37 47 MAXIMUM DETECTION CLK 38 CLK START + - 39 POWER OFF STARTER 0.1μ OFF 40 CHGVcc 41 V / I + V / I + V / I + V / I + MUTE34 0.1μ PSW 100k 21 IN2 HVcc 33μ 47μ MUTE2 MUTE34 19 IN4 18 IN3 17 Vref 16 VSYS2 OVER-VOLTAGE TSD 15 TRIANGLE WAVE PRE-DRIVER POWER SUPPLY PWMFIL + - + + - OPOUT 13 - + - + - 43 14 + 42 PREGND OP+ CONTROL CIRCUIT POWER SUPPLY SEL VSYS1 12 44 VIN 47 μ + DC-DC Converter application 8.2k VOUT + 0.022μ 8 0.1μ 9 470p 10 OP- 7 N.C. 6 EI 5 SPRT 0.1 μ EO 4 SW 3 DEAD 2 RESET 1 BATT + CT 10p BSEN 2200p - 100k 11 FILTER 100μ * We shall not be liable for any trouble or damege caused by using this circuit. *In the evert a problem which may affect industrial property or any other rights of us or a third party is encountered during the use of information described in these circuit,Mitsumi Electric Co.,Ltd.shall not be liable for any such problem,nor grant a license therefor. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 14 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT CIRCUIT OPERATION 1 H-bridge driver block (1) Gain setting ·The driver input resistance (ch 1,3 and 4) are 11kΩ typ. ,ch2 is 7.5kΩ typ. . Set the gain according to the following formula. R:Externally-connected input ch1 55k ch2 GV=20 log 11k+R ch3 (db) 110k ch2 GV=20 log 7.5k+R (db) ·The driver output stage power supply is HVcc (36PIN), and the bridge circuit power supply is VSYS2 (15PIN). Connect a bypass capacitor between these two power supplies (approximately 0.1μF). (2) Mute function ·Of the four drivers,ch1 has a brake function, and the other channels have a mute function. ·When BRAKE1(23PIN)is set to high level, both ch1 outputs go low level, and the circuit enters brake mode. ·When MUTE2(21PIN)is set to high level, the ch2 output is muted. ·When MUTE34(19PIN)is set to high level, the ch3 and 4 outputs are muted. (3) Vref drop mute ·When the voltage applied to Vref (16PIN)is 1.0V or less typ. , the driver outputs are set to high impedance. (4) Thermal shutdown ·When the chip temperature reaches 150℃ typ. the output current is cut. The chip starts operating again at about 120℃ typ. . 2 PWM power supply drive block ·This detects the maximun output level from among the four channels, and supplies the load drive power supply (36PIN)for the PWM. The external components are a PNP transistor, coil, Schottky diode, and capacitor. 33μH BATT 10pF + 100kΩ SBD 47kΩ 0.1μF 47μF 2200pF 44 37 36 PWMFIL PSW HVcc 3 DC-DC converter block (1) Output voltage ·3.2V typ. voltage multiplier circuit can be constructed using external components. This voltage can be varied with the addition of an external resistor. The setting method is as follows. VSYS1=1.2× R1· R3 R2· R4 + R1 + R3 R2 + R4 R2· R4 R2 + R4 (V) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 15 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT VSYS1 12 R3 R1 + 7 R2 EI R4 R1=external resistor R2=external resistor R3=35kΩ R4=21kΩ 1.2V (2) Short protect function ·When the error amplifier output(6PIN)has switched to the high-level state, SPRT (8PIN)is charged, and when the voltage reaches 1.2V typ. , the SW(5PIN)switching stops. The time until switching stops is set by the capacitor connected to SPRT(8PIN)according to the following formula. t=CSPRT × VTH (sec) (VTH=1.2V,ISPRT=10μA) ISPRT (3) Soft start function ·The soft start function operates when a capacitor is connected between DEAD(4PIN)and GND. Also, the maximum duty can be varied by connecting a resistor to 4PIN. t=CDEAD × R(sec) ( R=65kΩ) (4) Power off function ·When low-level is applied to OFF(40PIN), SPRT(8PIN)is charged, and when the voltage reaches 1.2V typ. , the SW(5PIN)switching stops. The time until switching stops is set by the capacitor connected to SPRT (8PIN)according to the following formula. t=CSPRT× VTH (sec)(VTH=1.2V,IOFF=20μA) IOFF (5) Over voltage protection circuit ·When the voltage applied to BSEN(1PIN)reaches 8.4V typ. , SPRT (8PIN) is charged, and when the voltage reaches 1.2V typ. , theSW (5PIN)switching stops. The time until switching stops is set by the capacitor connected to SPRT(8PIN)according to the following formula. t=CSPRT× VTH (sec)(VTH=1.2V,IHV=20μA) IHV 4 Empty detector block (1) Output voltage ·When the voltage applied to the BSEN(1PIN)falls below the detector voltage, EMP(35PIN)goes from high level to low level(open-collector output). The detector voltage has 50mV typ. of hysteresis to prevent output chattering. Use SEL (42PIN) to switch the detection voltage as shown below. SEL Detect Voltage Return Voltage L 2.20V typ. 2.25V typ. High-Z 1.80V typ. 1.85V typ. 5 Reset circuit block ·At about 90% typ. of the DC-DC converter output voltage, RESET(3PIN)goes from low level to high level, and AMUTE(34PIN)goes from high level to low level. The reset voltage has 50mV typ. of hysteresis to prevent output chattering. 6 Charging circuit block ·The power supply for the charging circuit block is CHGVCC(41PIN), and is independent from the other circuits. The resistance between RCHG (33PIN) and GND sets the charging current. This current is drawn from SEL (42PIN). ·A thermal shutdown circuit is provided, and when the chip temperature reaches 150℃ typ. the charging current is cut. The chip starts operating again at about 120℃ typ. . UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 16 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTIC Input Load Fluctuation RL=∞ 3 Output Voltage:Vo (V) 2 1 4Ω 8Ω 20Ω 0 8Ω -1 *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V 4Ω -2 -3 -0.8 ﹢ 20Ω -0.4 -0.6 -0.2 0.2 0 0.4 0.8 0.6 Input Voltage:Vin (V) Input Load Fluctuation (ch2) RL=﹢ 3 Output Voltage:Vo (V) 2 1 4Ω 8Ω 20Ω 0 8Ω 20Ω -1 *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V 4Ω -2 ﹢ -3 -0.8 -0.4 -0.6 -0.2 0.2 0 0.4 0.6 0.8 Input Voltage:Vin (V) Dead Zone Input voltage: VIN (mV) 0.006 0.004 0.002 20Ω *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V 8Ω 4Ω 0 -0.002 8Ω 20Ω -0.004 4Ω -0.006 -30 -20 -10 0 10 20 30 Output Voltage:Vo(mV) Dead Output voltage E:VDAED (V) Eo Output Voltage:VEO(V) Error Amp Output Voltage 2.0 1.8 Ta=normal temperature 1.6 BATT=2.4V 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 1.0 0.0 0.5 EOPIN DAED PIN 1.5 2.0 2.5 3.0 3.5 4.0 Control Circuit Power Supply voltage:VSYS1(V) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 17 QW-R109-023,B UA1538 LINEAR INTEGRATED CIRCUIT Reset Output Voltage:VRST (V) Resete Pin Voltage 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 Ta=normal temperature BATT=2.4V 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Control Circuit Power Supply voltage:VSYS1(V) 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 18 QW-R109-023,B