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. ORDERING INFORMATION Lead Free UA1538L-QM1-Y Ordering Number Halogen Free UA1538G-QM1-Y www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Package Packing QFP-44 Tray 1 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION RCHG OUT1R OUT1F OUT2R OUT2F 32 33 31 29 30 POW GND 28 OUT3F OUT3R OUT4F OUT4R BRAKE1 26 27 25 24 23 AMUTE 34 22 IN1 EMP 35 21 MUTE2 HVCC 36 20 IN2 PSW 37 19 MUTE34 CLK 38 18 IN4 17 IN3 UTC UA1538 START 39 OFF 40 16 VREF CHGVCC 41 15 VSYS2 SEL 42 14 OP+ PREGND 43 13 PWMFIL 44 12 VSYS1 1 2 BSEN BATT 3 4 RESET DEAD 5 6 7 8 9 10 11 SW EO EI SPRT CT N.C. OP- OPOUT PIN DESCRIPTION PIN NO. PIN NAME INPUT/OUTPUT FUNCTION 1 BSEN Input Battery Voltage Monitor 2 BATT Input Battery Power Supply Input 3 RESET Output Reset Detect Output 4 DEAD Input DEAD Time Setting UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw INTERMAL EQUIVALENT CIRCUIT Power Supply 2 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION(Cont.) PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT BATT 5 SW Output Transistor Drive For Voltage Multiplier 6 EO Output Error Amplifier Output 5 150Ω 6kΩ VSYS1 35kΩ 7 EI Input Error Amplifier Input 7 21.6kΩ 8 SPRT Output Short Circuit Protection Setting VSYS1 BATT 2kΩ 9 9 CT Output Triangular-Wave Output 420kΩ 10kΩ 10 N.C. 11 14 OPOP+ Input Op Amp Negative Input Op Amp Positive Input 12 VSYS1 Input Control Circuit Power Supply Input 13 OPOUT Output 15 VSYS2 Input Driver Pre-step Power Supply 16 VREF Input Reference Voltage Input Op Amp Output UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Control Circuit Power Supply Pre-Drive Power Supply 3 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION(Cont.) PIN NO. PIN NAME INPUT/OUTPUT FUNCTION Input Ch3 Control Signal Input Ch4 Control Signal Input Ch2 Control Signal Input Ch1 Control Signal Input Input Ch3 and 4 Mute Ch2 Mute Ch1 Brake 17 18 20 22 IN3 IN4 IN2 IN1 19 21 23 MUTE34 MUTE2 BRAKE1 24 25 26 27 29 30 31 32 OUT4R OUT4F OUT3R OUT3F OUT2F OUT2R OUT1F OUT1R 28 POWGND 36 HVCC Input Ch4 Negative Output Ch4 Positive Output Ch3 Negative Output Ch3 Positive Output Ch2 Positive Output Ch2 Negative Output Ch1 Positive Output Ch1 Negative Output Power Block Power Supply Ground H-Bridge Power Supply Input 33 RCHG Input Charge Current Setting 34 AMUTE Output Reset Invert Output 35 EMP Output Empty Detect Output Output INTERMAL EQUIVALENT CIRCUIT 19 21 68kΩ 68kΩ 23 BATT 37 37 PSW Output PWM Transistor Drive 50Ω 38 CLK Input External Clock Synchronizing Input UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION(Cont.) PIN NO. PIN NAME INPUT/OUTPUT FUNCTION 39 START Input Voltage Multiplier DC-DC Converter Start 40 OFF Input Voltage Multiplier DC-DC Converter OFF 41 CHGVCC Input Charging Circuit Power Supply Input INTERMAL EQUIVALENT CIRCUIT Charging Circuit Power Supply BATT 200kΩ 130kΩ 42 SEL 43 PREGND Input/Output Empty Detect Level Switch Pre Section Power Supply Ground 15kΩ 42 Pre Section Power Supply Ground VSYS1 2kΩ 44 PWMFIL Input PWM Phase Compensation 44 2kΩ *The positive and negative outputs are the polarity with respect to the input UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM RCHG OUTIR OUT1F OUT2R 33 32 31 30 OUT2F POWGND OUT3F OUT3R 29 28 27 OUT4R BRAKE1 OUT4F 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 TSD 15 TRIANGLE WAVE CONTROL CIRCUIT POWER SUPPLY PRE-DRIVER POWER SUPPLY PREGND - + + - 43 + - + + - 14 OP+ 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 13 OPOUT 12 POWER UNIT POWER SUPPLY PWMFIL 44 VSYS2 - SEL 42 + CHGVCC 41 6 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (TA=25℃) PARAMETER SYMBOL RATINGS UNIT Supply Voltage (Note 2) VCC 13.5 V Driver Output Current IO 500 mA Power Dissipation PD 625 mW ℃ Operating Temperature TOPR -20 ~ +85 ℃ Storage Temperature TSTG -40 ~ +150 Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. VCC shows input voltage of VSYS1,VSYS2, HVCC, BATT and CHGVCC. 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 ℃ ELECTRICAL CHARACTERISTICS (TA=25℃, BATT=2.4V, VSYS1=VSYS2=3.2V, VREF=1.6V, CHGVCC=0V, fCLK=88.2kHz, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT COMMON SECTION BATT Stand-by Current IST BATT=9.0V, VSYS1=VSYS2=VREF=0V 0 3 μA BATT Supply Current (No load) IBAT HVCC=0.45V, MUTE34=3.2V 2.5 4.0 mA VSYS1 Supply Current (No load) ISYS1 HVCC=0.45V, MUTE34=3.2V, EI=0V 4.5 mA VSYS2 Supply Current (No load) ISYS2 HVCC=0.45V, MUTE34=3.2V 4.1 5.5 mA CHGVCC Supply Current (No load) ICGVCC CHGVCC=4.5V, ROUT=OPEN 0.65 2.00 mA H-BRIDGE DRIVER PART Voltage Gain ch1,ch3.ch4 GVC134 12 14 16 dB Voltage Gain ch2 GVC2 21.5 23.5 24.5 dB Gain Error By Polarity ⊿GVC -2 0 2 dB Input pin resistance ch1,ch3,ch4 RIN134 IN=1.7V and 1.8V 9 11 13 kΩ Input pin resistance ch2 RIN2 IN=1.7V and 1.8V 6 7.5 9 kΩ Maximum Output Voltage VOUT RL=8Ω,HVCC=BATT=4.0V IN=0-3.2V 1.9 2.1 V Saturation Voltage (Lower) VSATL IO=-300mA, IN=0 and 3.2V 240 400 mV Saturation Voltage (Upper) VSATU IO=-300mA, IN=0 and 3.2V 240 400 mV Input Offset Voltage VOI -8 0 8 mV Output Offset Voltage ch1,ch3,ch4 VOO134 VREF=IN=1.6V -50 0 50 mV Output Offset Voltage ch2 VOO2 VREF=IN=1.6V -130 0 130 mV Dead Zone VDB -10 0 10 mV BRAKE1ON Threshold Voltage VBRON IN1=1.8V 2.0 V BRAKE1OFF Threshold Voltage VBROFF IN1=1.8V 0.8 V MUTE2 ON Threshold Voltage VM2ON IN2=1.8V 2.0 V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER H-BRIDGE DRIVER PART MUTE2 OFF Threshold Voltage MUTE34 ON Threshold Voltage MUTE34 OFF Threshold Voltage VREF ON Threshold Voltage 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 SYMBOL VM2OFF VM34ON VM34OFF VREFON VREFOFF IBRAKE1 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 VSPR ISPR1 ISPR2 ISPR3 RSPR VSPTH VHVPR VSW1H SW Pin Output Voltage2 "H" SW Pin Output Voltage2 "L" VSW2H VSW2L SW Pin Oscillating Frequency2 SW Pin Oscillating Frequency3 SW Pin Minimum Pulse Width Pulse Duty Start Max. Pulse Duty At Self-Running Max. Pulse Duty At CLK Synchronization IN2=1.8V IN3=IN4=1.8V IN3=IN4=1.8V IN1=IN2=IN3=IN4=1.8V IN1=IN2=IN3=IN4=1.8V Current difference between BRAKE pin "H" time and "L" time. IPSW VSHIF IHLK GPWM SW Pin Output Voltage1 "H" SW Pin Oscillating Frequency1 TEST CONDITIONS fSW1 fSW2 fSW3 TSWMIN DSW1 DSW2 DSW3 EI=1.3V EI=0.7V EI=1.3V, OFF=0V EI=1.3V, BATT=9.5V 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 CT=470pF, EI=0.7V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 0.8 0.8 0.8 V V V V V 2.0 1.2 4 7 10 mA 10 0.35 1/60 13 0.45 0 1/50 17 0.55 5 1/40 mA V μA 1/kΩ 3.05 1.4 3.20 1.6 3.35 0.3 V V V 0 10 20 20 220 1.20 0.1 16 32 32 265 1.30 9.0 V μA μA μA kΩ V V 0.78 0.98 1.13 V 1.00 1.50 0.30 0.45 V V 65 80 95 kHz 60 70 88.2 82 6 12 12 175 1.10 7.5 0.01 40 70 50 80 0.60 60 90 kHz kHz μs % % 65 75 85 % 8 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER INTERFACE OFF Pin Threshold Voltage OFF Pin Bias Current SYMBOL TEST CONDITIONS VOFTH EI=1.3V IOFF OFF=0V 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 DEAD TIME DEAD Pin Impedance DEAD Pin Output Voltage STARTER CIRCUIT Starter Switching Voltage 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 BSEN Pin Leak Current SEL Pin Detection Voltage SEL Pin Detection Current RESET CIRCUIT VSYS1 RESET Threshold Voltage Ratio RESET Detection Hysteresis Width RESET Pin Output Voltage RESET Pin PULL UP Resistance ISTART START=0V VCLKTHH VCLKTHL ICLK CLK=3.2V RDEAD VDEAD 75 BATT0.3 10 13 2.0 TYP 95 MAX UNIT VSYS12.0 115 BATT1.0 V μA V V 20 16 30 19 μA 0.8 10 V V μA 52 0.78 65 0.88 78 0.98 kΩ V VSTNM VSNHS VDIS VSYS1=VSYS2=0→3.2V, START=0V START=0V 2.3 130 1.63 2.5 200 1.83 2.7 300 2.03 V mV V VEMPT1 VEMPT2 VEMHS1 VEMHS2 VEMP IEMPL RBSEN IBSENL VSELTH ISELT 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 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 1.0 V V mV mV V μA kΩ V V μA HSRT VRSTHS VRST RRST AMUTE Pin Output Voltage 1 VAMT1 AMUTE Pin Output Voltage 2 VAMT2 AMUTE Pin Pull Down Resistance RAMT Comparison with error amplifier threshold voltage 1.5 -2 85 90 95 % 25 50 100 0.5 108 mV V kΩ BATT V BATT V 113 kΩ Io=1mA, VSYS1=VSYS2=2.8V 72 BATT Io=-1mA, VSYS1=VSYS2=2.8V -0.4 BATT Io=-1mA,START=0V, VSYS1=VSYS2=0V -0.4 77 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 90 95 9 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER 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 RCHG Pin Output Resistance SYMBOL IBIAS VOIOP VOHOP VOLOP ISOU ISIN GVO SR VRCHG RRCHG SEL Pin Leak Current 1 ISELLK1 SEL Pin Leak Current 2 ISELLK2 SEL Pin Saturation Voltage VSELCG TEST CONDITIONS TYP OP+=1.6V RL=OPEN RL=OPEN 50Ω GND 50Ω VSYS1 VIN=-75dBV, f=1kHz -5.5 2.8 0.4 CHGVCC=4.5V, RCHG=1.8kΩ. 0.71 CHGVCC=4.5V, RCHG=0.5 and 0.6V 0.75 CHGVCC=4.5V, RCHG=OPEN, BATT=4.5V CHGVCC=0.6V, RCHG=1.8kΩ, BATT=4.5V CHGVCC=4.5V, IO=300mA, RCHG=0Ω UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 0 -6.5 0.7 70 0.5 0.81 0.95 0.45 MAX UNIT 300 5.5 0.2 -3.0 nA mV V V mA mA dB V/μs 0.91 1.20 V kΩ 1.0 μA 1.0 μA 1.00 V 10 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT MEASURING CIRCUIT V a 1.8k SW20 A A a V b SW19 b a V b B b a SW18 SW17 V 51k V V V a SW21 b 27 26 25 24 23 OUT3F OUT3R OUT4F OUT4R BRAKE1 F a V 28 IN1 22 MUTE2 21 SW16 A 29 34 AMUTE b A 30 POWGND SW23 31 OUT2F a 32 OUT2R b 47 33 OUT1F SW22 OUTIR A 33μ R c a 47μ RCHG A + b a V 35 EMP 20 IN2 37 PSW SW15 A V 36 HVcc b a 19 V MUTE34 38 CLK A SW25 VREF 16 VSYS2 15 OP+ 14 V UTC UA1538 39 START SW13 a 40 OFF SW26 b a 41 CHGVcc 1k a SW27 V V 5 A 100μ b V a V A V 10 11 10k SW10 SW7 b a V A a d V + a 10μ SW11 50 c 20k a b SW9 b SW12 a b 10k a b UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 SW8 b a b frequency a SW3 8 SW6 V SW4 SW2 A 7 a A 10p SW1 a 6 SW5 12 OP- 4 VSYS1 N.C 3 13 Ct 2 2200p OPOUT SPRT 1 EI SW 100k DEAD A RESET 44 PWMFIL b SW28 BATT V a EO 43 PREGND BSEN b A 42 SEL + 17 b a b A A IN3 SW14 A A 18 100k a V 1M b 470p + 470μ A IN4 A SW24 A a V V 11 of 21 QW-R109-023,C 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 b 5 a a a b - 6 a 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 22 a a a - 24 b a b b a 25 a a a a a a - 26 a - 2 b b b a - 3 b a - 4 a a a a a a - 6 a - SW NO. 7 8 a a a b b a - 20 b b a 24 b b a - 25 a a a a a -a - 26 a a - UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 12 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT SWITCHING POSITION TABLE(Cont.) 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 - Ch1R Ch2R Ch3R Ch4R Ch1 Ch2 Ch3 Ch4 13 b b - 14 b b 15 b b - SW NO. 16 b b - 17 b b b b b b b b 18 b b b b b b b b 22 a a a a a a a a Ch1 Ch2 Ch3 Ch4 b - b b - b - b b b b b b b b a a a a Ch1R Ch2R Ch3R Ch4R Ch1F Ch1R Ch2F Ch2R Ch3F Ch3R Ch4F Ch4R b b b - b b b b b b - b b b - b b b b a a a a - b b b b a a a a a a a a a a a a a a a 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) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 13 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT SWITCHING POSITION TABLE(Cont.) ITEM Saturation Voltage (Upper) Input Offset Voltage Output Offset Voltage Dead Zone Ch1F Ch1R Ch2F Ch2R Ch3F Ch3R Ch4F Ch4R Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 13 b b a b b - 14 b b a b b SW NO. 16 b b a b b - 15 b b a b b - 17 a a a a b b b b b b b b 18 a a a a 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 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 - 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 - 14 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT SWITCHING POSITION TABLE(Cont.) SW NO. ITEM 19 a b a b 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 27 a a b SWITCHING POSITION TABLE VO4 VO3 VIN1 VIN2 XC' XC VO2 Dead Zone VIN3 VIN4 VO1 Output Offset Voltage Output Voltage:Vo (mV) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 15 of 21 QW-R109-023,C UA1538 APPLICATION CIRCUIT 27 26 25 24 BRAKE1 28 OUT4R 29 OUT4F 30 OUT3R 31 TRACKING FOCUS OUT3F OUT2R 32 OUT1F 33 OUTIR RCHG 1.8k POWGND M SPINDLE OUT2F 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 + IN3 17 VREF 16 VSYS2 15 PRE-DRIVER POWER SUPPLY - + + - 43 PWMFIL + - + + - OP+ CONTROL CIRCUIT POWER SUPPLY PREGND 14 VIN 47μ + DC-DC Converter application 8.2k VOUT + 0.022μ 0.1μ 9 470p 10 OP- 8 N.C. 7 CT - SPRT 0.1μ 6 EI 5 EO 4 SW 3 DEAD RESET BATT + 2 13 12 10p 1 OPOUT VSYS1 44 BSEN 19 18 TRIANGLE WAVE 42 2200p MUTE34 IN4 OVER-VOLTAGE TSD SEL 100k MUTE34 0.1μ PSW 100k 21 - 47μ MUTE2 IN2 HVCC 33μ + LINEAR INTEGRATED CIRCUIT 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 16 of 21 QW-R109-023,C 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. ch1 55k ch2 GV=20 log 11k+R ch3 R:Externally-connected input (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 (15 PIN). 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. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 17 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT CIRCUIT OPERATION(Cont.) (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. (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. (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. (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. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 18 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT CIRCUIT OPERATION(Cont.) 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 19 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTIC Output Voltage:Vo (V) Input Load Fluctuation Output Voltage:Vo (V) Input Load Fluctuation (ch2) Input voltage: VIN (mV) Dead Zone Dead Output voltage E:VDAED (V) Eo Output Voltage:VEO(V) Error Amp Output Voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 20 of 21 QW-R109-023,C UA1538 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTIC Reset Output Voltage:VRST (V) Resete Pin Voltage 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 21 of 21 QW-R109-023,C