MM1538

MM1538 UTC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 21

Technical content

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R109-009,A 4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS

DESCRIPTION

The UTC MM1538 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.

APPLICATIONS

*Portable CD radio cassette recorders QFP-44-0.8 PIN CONFIGURATION UTC MM1538 RCHG OUT1R OUT1F OUT2R OUT2F POW GND OUT3F OUT3R OUT4F OUT4R BRAKE1 AMUTE EMP HVcc PSW CLK START OFF CHGVcc SEL PREGND PWMFIL BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- VSYS1 OPOUT OP+ VSYS2 Vref IN3 IN4 MUTE34 IN2 MUTE2 IN1 33 32 31 30 29 28 27 26 25 24 23 23456 7 89 1 0 111

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R109-009,A PIN DESCRIPTION PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT

1 BSEN Input Battery Voltage Monitor 1

71kΩ 20 kΩ10.5kΩ 14.85kΩ 16.5kΩ

2 BATT Input Battery Power Supply Input Power Supply

3 RESET Output Reset Detect Output

90kΩ

4 DEAD Input DEAD Time Setting

49kΩ 30.8kΩ 13kΩ

5 SW Output Transistor Drive For

150Ω 6kΩ BATT

6 EO Output Error Amplifier Output

7 EI Input Error Amplifier Input

35kΩ 21.6kΩ

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R109-009,A PIN NO. PIN NAME INPUT/OUTPUT FUNCTIO N INTERMAL EQUIVALENT CIRCUIT

8 SPRT Output Short Circuit Protection

220kΩ

9 CT Output Triangular-Wave Output VSYS1

2kΩ 10kΩ 420kΩ BATT 10 N.C. OP- OP+ Input Op Amp Negative Input Op Amp Positive Input 14 11

12 VSYS1 Input Control Circuit Power

Control Circuit Power Supply

13 OPOUT Output Op Amp Output

15 VSYS2 Input Driver Pre-step Power

16 Vref Input Reference Voltage Input

24kΩ 50kΩ 200Ω IN3 IN4 IN2 IN1 Input ch3 Control Signal Input ch4 Control Signal Input ch2 Control Signal Input ch1 Control Signal Input 11kΩ 20PIN=7.5kΩ

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R109-009,A PIN NO. PIN NAME INPUT/OUTPUT FUNCTIO N INTERMAL EQUIVALENT CIRCUIT MUTE34 MUTE2 BRAKE1 Input Ch3 and 4 Mute Ch2 Mute Ch1 Brake 68kΩ 68kΩ21 OUT4R OUT4F OUT3R OUT3F OUT2F OUT2R OUT1F OUT1R Output Ch4 Negative Output Ch4 Positive Output Ch3 Negative Output Ch3 Positive Output Ch2 Positive Output Ch2 Negative Output Ch1 Positive Output Ch1 Negative Output

28 POWGND Power Block Power Supply

36 HVcc Input H-Bridge Power Supply

33 RCHG Input Charge Current Setting

950Ω

34 AMUTE Output Reset Invert Output

95kΩ

35 EMP Output Empty Detect Output 35

37 PSW Output PWM Transistor Drive

50Ω BATT

38 CLK Input External Clock

2kΩ 50kΩ 100kΩ

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R109-009,A PIN NO. PIN NAME INPUT/OUTPUT FUNCTIO N INTERMAL EQUIVALENT CIRCUIT

39 START Input Voltage Multiplier DC-DC

200kΩ 390kΩ BATT

40 OFF Input Voltage Multiplier DC-DC

27kΩ VSYS1 180kΩ

41 CHGVcc Input Charging Circuit Power

Charging Circuit Power Supply

42 SEL Input/Output Empty Detect Level Switch

15kΩ BATT 200kΩ 130kΩ

43 PREGND Pre Section Power Supply

Pre Section Power Supply Ground

44 PWMFIL Input PWM Phase Compensation

2kΩ VSYS1 2kΩ *The positive and negative outputs are the polarity with respect to the input

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R109-009,A BLOCK DIAGRAM 33 32 31 30 29 28 27 26 25 24 23 + - V I V I V I V I ++ - 123456 + - 7 8 9 10 11 RCHG OUTIR OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 BRAKE1 MUTE2 AMUTE EMP HVcc BTL BTL BTL BTL TSD PSW CLK START OFF CHGVcc SEL PREGND PWMFIL CLK MAXIMUM DETECTION POWER OFF STARTER OVER-VOLTAGE TSD BSEN BATT RESET DEAD SW EO EI SPRT C T N.C. OP- POW ER UNIT POW ER SUPPLY TRIANGLE WAVE PRE-DRIVER POWER SUPPLY CO NTRO L CIRCUIT POW ER SUPPLY MUTE34 VSYS1 OPOUT OP+ VSYS2 Vref IN3 IN4 MUTE34 IN2 MUTE2 IN1

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R109-009,A ABSOLUTE MAXIMUM RATINGS (Ta=25°C ) PARAMETER SYMBOL RATINGS UNIT Supply Voltage Vcc *1 13.5 V Driver Output Current Io 500 mA Power Dissipation P D 625 mW Operating Temperature T OPR -30~+85 °C Storage Temperature T STG -55~+150 °C *1: Vcc shows input voltage of VSYS1,VSYS2, HVcc, BATT,and CHGVcc. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP MAX UNIT Control Circuit Power Supply Voltage VSYS1 2.7 3.2 5.5 V Pre-Driver Circuit Power Supply Voltage VSYS2 2.7 3.2 5.5 V H-Bridge Power Supply Voltage HVcc PWM BATT V Power Supply Voltage BATT 1.5 2.4 8.0 V Charging circuit Power supply Voltage CHGVcc 3.0 4.5 8.0 V Operating Temperature Ta -10 25 70 °C

ELECTRICAL CHARACTERISTICS

(Ta=25°C, 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) I BAT 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 4.7 6.4 mA VSYS2 Supply Current (No load) I SYS2 HVcc=0.45V, MUTE34=3.2V 4.1 5.5 mA CHGVcc Supply Current (No load) I CGVCC CHGV CC=4.5V, ROUT=OPEN 0.65 2.00 mA H-Bridge Driver Part Voltage Gain ch1,ch3.ch4 G VC134 12 14 16 dB Voltage Gain ch2 G VC2 21.5 23.5 24.5 dB Gain Error By Polarity ⊿GVC -2 0 2 dB Input pin resistance ch1,ch3,ch4 R IN134 IN=1.7V and 1.8V 9 11 13 k Ω Input pin resistance ch2 R IN2 IN=1.7V and 1.8V 6 7.5 9 k Ω Maximum Output Voltage VOUT RL=8Ω,HVcc=BATT=4.0V, IN=0-3.2V 1.9 2.1 V Saturation Voltage (Lower) V satL Io=-300mA, IN=0 and 3.2V 240 400 mV Saturation Voltage (Upper) V satU Io=-300mA, IN=0 and 3.2V 240 400 mV Input Offset Voltage V OI -8 0 8 mV Output Offset Voltage ch1,ch3,ch4 V OO134 Vref=IN=1.6V -50 0 50 mV Output Offset Voltage ch2 V OO2 Vref=IN=1.6V -130 0 130 mV Dead Zone V DB -10 0 10 mV BRAKE1ON Threshold Voltage V BRON IN1=1.8V 2.0 V BRAKE1OFF Threshold Voltage V BROFF IN1=1.8V 0.8 V MUTE2 ON Threshold Voltage V M2ON IN2=1.8V 2.0 V H-Bridge Driver Part MUTE2 OFF Threshold Voltage V M2OFF IN2=1.8V 0.8 V MUTE34 ON Threshold Voltage V M34ON IN3=IN4=1.8V 0.8 V MUTE34 OFF Threshold Voltage V M34OFF IN3=IN4=1.8V 2.0 V Vref ON Threshold Voltage V refON IN1=IN2=IN3=IN4=1.8V 1.2 V Vref OFF Threshold Voltage V refOFF IN1=IN2=IN3=IN4=1.8V 0.8 V

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 8 QW-R109-009,A PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT BRAKE1 Brake Current IBRAKE1 Current difference between BRAKE pin "H" time and "L" time. 4 7 10 mA PWM Power Supply Driving PSW Sink Current I PSW IN1=2.1V 10 13 17 mA HVcc Level Shift Voltage V SHIF IN1=1.8V, HVcc-OUT1F 0.35 0.45 0.55 V HVcc Leak Current IHLK HVcc=9.0V, VSYS1=VSYS2=BATT=0V 0 5 μA PWM Amp Transfer Gain G PWM IN1=1.8V, HVcc=1.2 ~ 1.4V 1/60 1/50 1/40 1/k Ω DC-DC Converter Error Amp VSYS1 Threshold Voltage V S1TH 3.05 3.20 3.35 V EO Pin Output Voltage "H" V EOH EI=0.7V, Io=-100µA 1.4 1.6 V EO Pin Output Voltage "L" V EOL EI=1.3V, Io=100µA 0.3 V Short Circuit Protection SPRT Pin Voltage V SPR EI=1.3V 0 0.1 V EO=H SPRT Pin Current1 I SPR1 EI=0.7V 6 10 16 μA OFF=L SPRT Pin Current2 I SPR2 EI=1.3V, OFF=0V 12 20 32 μA SPRT Pin Current3 Over-Voltage I SPR3 EI=1.3V, BATT=9.5V 12 20 32 μA SPRT Pin Impedance R SPR 175 220 265 k Ω SPRT Pin Threshold Voltage V SPTH EI=0.7V, C T=0V 1.10 1.20 1.30 V Over-Voltage Protection Detect V HVPR BSEN Pin Voltage 8.0 8.4 9.0 V Transistor Driving SW Pin Output Voltage1 "H" VSW1H BATT=CT=1.5V, VSYS1=VSYS2=0V, Io=-2mA Starting Time 0.78 0.98 1.13 V SW Pin Output Voltage2 "H" VSW2H CT=0V, Io=-10mA, EI=0.7V, SPRT=0V 1.00 1.50 V SW Pin Output Voltage2 "L" V SW2L C T=2.0V, Io=10mA 0.30 0.45 V SW Pin Oscillating Frequency1 fSW1 CT=470pF, VSYS1=VSYS2=0V Starting Time 65 80 95 kHz SW Pin Oscillating Frequency2 f SW2 C T=470pF, CLK=0V 60 70 82 kHz SW Pin Oscillating Frequency3 f SW3 C T=470pF 88.2 kHz SW Pin Minimum Pulse Width TSWmin CT=470pF, EO=0.5V→0.7V Sweep 0.01 0.60 μs Pulse Duty Start D SW1 C T=470pF, VSYS1=VSYS2=0V 40 50 60 % Max. Pulse Duty At Self-Running D SW2 C T=470pF, EI=0.7V, CLK=0V 70 80 90 % Max. Pulse Duty At CLK Synchronization DSW3 CT=470pF, EI=0.7V 65 75 85 % Interface OFF Pin Threshold Voltage VOFTH EI=1.3V VSYS1- 2.0 V OFF Pin Bias Current I OFF OFF=0V 75 95 115 μA START Pin ON Threshold Voltage VSTATH1 VSYS1=VSYS2=0V, CT=2.0V BATT- 1.0 V START Pin OFF Threshold Voltage VSTATH2 VSYS1=VSYS2=0V, CT=2.0V BATT- 0.3 V START Pin Bias Current ISTART START=0V 10 19 μA CLK Pin Threshold Voltage "H" V CLKTHH 2.0 V CLK Pin Threshold Voltage "L" V CLKTHL 0.8 V CLK Pin Bias Current I CLK CLK=3.2V 10 μA Dead Time DEAD Pin Impedance R DEAD 52 65 78 k Ω DEAD Pin Output Voltage V DEAD 0.78 0.88 0.98 V Starter Circuit

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 9 QW-R109-009,A PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Starter Switching Voltage VSTNM VSYS1=VSYS2=0→3.2V, START=0V 2.3 2.5 2.7 V Starter Switching Hysteresis Width V SNHS START=0V 130 200 300 mV Discharge Release V DIS 1.63 1.83 2.03 V Empty Detection EMP Detection Voltage 1 V EMPT1 VSEL=0V 2.1 2.2 2.3 V EMP Detection Voltage 2 V EMPT2 ISEL=- 2µA 1.7 1.8 1.9 V EMP Detection Hysteresis Voltage 1 VEMHS1 VSEL=0V 25 50 100 mV EMP Detection Hysteresis Voltage 2 VEMHS2 ISEL=- 2µA 25 50 100 mV EMP Pin Output Voltage V EMP Io=1mA, BSEN=1V 0.5 V EMP Pin Output Leak Current I EMPL BSEN=2.4V 1.0 μA BSEN Pin Input Resistance R BSEN VSEL=0V 17 23 27 k Ω BSEN Pin Leak Current I BSENL VSYS1=VSYS2=0V, BSEN=4.5V 1.0 V SEL Pin Detection Voltage V SELTH V SELTH=BATT-SEL, BSEN=2.0V 1.5 V SEL Pin Detection Current I SELT -2 μA Reset Circuit VSYS1 RESET Threshold Voltage Ratio HSRT Comparison with error amplifier threshold voltage 85 90 95 % RESET Detection Hysteresis Width V RSTHS 25 50 100 mV RESET Pin Output Voltage V RST Io=1mA, VSYS1=VSYS2=2.8V 0.5 V RESET Pin PULL UP Resistance R RST 72 90 108 k Ω AMUTE Pin Output Voltage 1 VAMT1 Io=-1mA, VSYS1=VSYS2=2.8V BATT -0.4 BATT V AMUTE Pin Output Voltage 2 VAMT2 Io=-1mA, START=0V, VSYS1=VSYS2=0V BATT -0.4 BATT V AMUTE Pin PULL DOWN Resistance RAMT 77 95 113 kΩ Op Amp Input Bias Current I BIAS OP+=1.6V 300 nA Input Offset Voltage V OIOP -5.5 0 5.5 mV High Level Output Voltage V OHOP R L=OPEN 2.8 V Low level Output Voltage V OLOP R L=OPEN 0.2 V Output Drive Current (Source) I SOU 50 ΩGND -6.5 -3.0 mA Output Drive Current (Sink) I SIN 50 ΩVSYS1 0.4 0.7 mA Open Loop Voltage Gain GVO V IN=-75dBV, f=1kHz 70 dB Slew Rate SR 0.5 V/ μs Battery Charging Circuit RCHG Pin Output Resistance RRCHG CHGVcc=4.5V, RCHG=0.5 and 0.6V 0.75 0.95 1.20 kΩ SEL Pin Leak Current 1 ISELLK1 CHGVcc=4.5V, RCHG=OPEN, BATT=4.5V 1.0 μA SEL Pin Leak Current 2 ISELLK2 CHGVcc=0.6V, RCHG=1.8kΩ, BATT=4.5V 1.0 μA SEL Pin Saturation Voltage VSELCG CHGVcc=4.5V, Io=300mA, RCHG=0Ω 0.45 1.00 V

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 10 QW-R109-009,A MEASURING CIRCUIT UTC MM1538 RCHG OUTIR OUT1F OUT2R OUT2F POW GND OUT3F OUT3R OUT4F OUT4R BRAKE1AMUTE EMP HVcc PSW CLK START OFF CHGVcc SEL PREGND PWMFIL BSEN BATT RESET DEAD SW EO EI SPRT Ct N.C OP- VSYS1 OPOUT OP+ VSYS2 Vref IN3 IN4 MUTE34 IN2 MUTE2 IN1 33 32 31 30 29 28 27 26 25 24 23 23456 7 8 9 10 111 V V V RF SW17SW18 aa b b VAVAVAVA A V A V V V VAV V VA V A V A V A V A A A A A V A A A V V V A A V SW16 a b SW15 a b SW14 a b SW13 a b 10μ SW12 SW11a b 20k 100k 470μ+ SW10 d a b SW8 10k b SW9 a 470p baSW7 a b frequency SW6 b aa SW5 SW4 a b 10k SW3 a ba a SW1 SW2 A b 10p 2200p 100k ab SW28 SW27 a b a b SW26 SW25 a a SW24 SW23 SW22 SW21 a b b a c a b 51k 33μ 47μ a b 100μ SW20 a b SW19 1.8k c a B

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 11 QW-R109-009,A SWITCHING POSITION TABLE SW NO. ITEM 1 4 5 6 7 8 22 24 25 26 BATT Stand-by Current - - - - - - - - - - BATT Supply Current (No load) - - - - - - a - a - VSYS1 Supply Current (No load) - - - a - - a - a - VSYS2 Supply Current (No load) - - - - - - a - a - CHGVcc Supply Current (No load) - - - - - - - - - - VSYS1 Threshold Voltage - - a - - - - - - - EO Pin Output Voltage “H” - - a a - - - - - - EO Pin Output Voltage ”L” - - a a - - - - - - SPRT Pin Voltage - - - a a - - - - - SPRT Pin Current1 EO=”H” - - - a b - - - - - SPRT Pin Current2 OFF=”L” - - - a b - - - - a SPRT Pin Current3 Over-Voltage a - - a b - - - - - SPRT Pin Impedance - - - - b - - - - - SPRT Pin Threshold Voltage - - - a a a - - - - Over-Voltage Protection Detect a - - - a - - - - - SW Pin Output Voltage1”H” - a - - - a - - a - SW Pin Output Voltage2”H” - a - a b a - - - - SW Pin Output Voltage2”L” - a - - - a - - - - SW Pin Oscillating Frequency 1 - b - - - b - - a - SW Pin Oscillating Frequency 2 - b - - - b - b - - SW Pin Oscillating Frequency 3 - b - - - b - a - - SW Pin Minimum Pulse Width - b b - - b - - - - Pulse Duty Start - b - - - b - b a - Max Pulse Duty At Self-Running - b - - - b - b - - Max Pulse Duty At CLK Synchronization - b - a - b - a - - -: Turn off switch

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 12 QW-R109-009,A SW NO. ITEM 2 3 4 6 7 8 20 24 25 26 DEAD Pin Impedance - b - - - - - - - - DEAD Pin Output Voltage - a - - - - - - - - OFF Pin Threshold Voltage - - - a a - - - - a OFF Pin Bias Current - - - - - - - - - a START Pin ON Threshold Voltage - - a - - a - - a - START Pin OFF Threshold Voltage - - a - - a - - a - START Pin Bias Current - - - - - - - - a - CLK Pin Threshold Voltage “H” - - a - - b - b - - CLK Pin Threshold Voltage “L” - - a - - b - b - - CLK Pin Bias Current - - - - - - - a - - Starter Switching Voltage - - a - - - - - a - Starter Switching Hysteresis Width - - a - - - - - a - Discharge Release Voltage - - - - a - - - - - VSYS1 Pin RESET Threshold Voltage RESET Detection Hysteresis Width b - - - - - - - - - RESET Pin Output Voltage b - - - - - - - - - RESET Pin PULL UP Resistance a - - - - - - - - - AMUTE Pin Output Voltage 1 - - - - - - b - -- - AMUTE Pin Output Voltage 2 - - - - - - b - a - AMUTE Pin PULL DOWN Resistance - - - - - - a - - - -: Turn off switch SW NO. ITEM 1 9 10 11 12 21 27 EMP Detection Voltage 1 a - - - - a a EMP Detection Voltage 2 a - - - - a b EMP Detection Hysteresis Voltage 1 a a - - - a a EMP Detection Hysteresis Voltage 2 a - - - - a b EMP Pin Output Voltage a - - - - b - EMP Pin Output Leak Current a - - - - c - BSEN Pin Input Resistance a - - - - - a BSEN Pin Leak Current a - - - - - - SEL Pin Detection Voltage a - - - - a a SEL Pin Detection Current a - - - - a b Input Bias Current - - a - - - - Input Offset Voltage - - d - - - - “H” Level Output Voltage - b c - - - - “L” Level Output Voltage - a c - - - - Output Drive Current (Source) - - d b - - - Output Drive Current (Sink) - - d a - - - Open Loop Voltage Gain - - b - a - - Slew Rate - - d - a - - -: Turn off switch

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 13 QW-R109-009,A SW NO. ITEM 13 14 15 16 17 18 22 Ch1R - - - b b b a Ch2R - - b - b b a Ch3R b - - - b b a Voltage Gain Ch4R - b - - b b a Ch1 - - - b b b a Ch2 - - b - b b a Ch3 b - - - b b a Gain Error By Polarity Ch4 - b - - b b a Ch1 - - - b b b a Ch2 - - b - b b a Ch3 b - - - b b a Input Pin resistance Ch4 - b - - b b a Ch1R - - - b b b a Ch2R - - b - b b a Ch3R b - - - b b a Maximum Output Voltage Ch4R - b - - b b a Ch1F - - - b a - a Ch1R - - - b - a a Ch2F - - b - a - a Ch2R - - b - - a a Ch3F b - - - a - a Ch3R b - - - - - a Ch4F - b - - a - a Saturation Voltage (Lower) Ch4R - b - - - a a Ch1F - - - b a - a Ch1R - - - b - a a Ch2F - - b - a - a Ch2R - - b - - a a Ch3F b - - - a - a Ch3R b - - - - a a Ch4F - b - - a - a Saturation Voltage (Upper) Ch4R - b - - - a a Ch1 - - - a - - a Ch2 - - a - - - a Ch3 a - - - - - a Input Offset Voltage Ch4 - a - - - - a Ch1 - - - b b b a Ch2 - - b - b b a Ch3 b - - - b b a Output Offset Voltage Ch4 - b - - b b a Ch1 - - - b b b a Ch2 - - b - b b a Ch3 b - - - b b a Dead Zone Ch4 - b - - b b a -: Turn off switch

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 14 QW-R109-009,A SW NO. ITEM 13 14 15 16 17 18 22 23 28 BRAKE1 ON Voltage Ch1 - - - b b b a - - BRAKE1 OFF Voltage Ch1 - - - b b b a - - MUTE2 ON Voltage Ch2 - - b - b b a - - MUTE2 OFF Voltage Ch2 - - b - b b a - - Ch3 b - - - b b a - - MUTE34 ON Voltage Ch4 - b - - b b a - - Ch3 b - - - b b a - - MUTE34 OFF Voltage Ch4 - b - - b b a - - Ch1 - - - b b b a - - Ch2 - - b - b b a - - Ch3 b - - - b b a - - Vref ON Voltage Ch4 - b - - b b a - - Ch1 - - - b b b a - - Ch2 - - b - b b a - - Ch3 b - - - b b a - - Vref OFF Voltage Ch4 - b - - b b a - - BREAK1 Brake Current Ch1 - - - b b b a - - PWM Sink Current - - - b - - a b a HVcc Level Shift Voltage - - - b b b b a b HVcc Leak Current - - - - b b a - - PWM Amp Transfer Gain - - - b b b a - - SW NO. ITEM 19 27 CHGSET Pin Bias Voltage a - CHGSET Pin Output Resistance b - SEL Pin Leak Current 1 - a SEL Pin Leak Current 2 a a SEL Pin Saturation Voltage b b -: Turn off switch

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 15 QW-R109-009,A SWITCHING POSITION TABLE VIN1 VIN2 VO3VO4 VIN3 VIN4 Dead Zone Output Offset Voltage VO2 VO1 Output Voltage:Vo (mV) Input voltage:VIN (mV) XC' XC * Voltage Gain Gvc(+)=20 log Gvc(-)=20 log * Gain Error By Polarity Gvc=Gvc (+)-Gvc (-) * Dead Zone XC-XC'= - VO1-VO2 VIN1-VIN2 VO3-VO4 VIN3-VIN4 VIN2•VO1 - VIN1•VO2 VO1-VO2 VIN3•VO4 - VIN4•VO3 VO3-VO4

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 16 QW-R109-009,A APPLICATION CIRCUIT 33 32 31 30 29 28 27 26 25 24 23 + - V I V I V I V I ++ - 1 23456 + - 7 8 9 10 11 RCHG OUTIR OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 BRAKE1 MUTE2 AMUTE EMP HVcc BTL BTL BTL BTL TSDPSW CLK START OFF CHGVcc SEL PREGND PWMFIL CLK MAXIMUM DETECTION POWER OFF STARTER OVER-VOLTAGE TSD BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- TRIANGLE WAVE PRE-DRIVER POWER SUPPLY CONTROL CIRCUIT POW ER SUPPLY MUTE34 VSYS1 OPOUT OP+ VSYS2 Vref IN3 IN4 MUTE34 IN2 MUTE2 IN1 M 1.8k TRAVERSE SPINDLE FOCUS TRACKING FILTER470p0.1μ0.022μ8.2k 100μ VOUTDC-DC Converter application 0.1 μ VIN μ 10p 100k 2200p 100k 0.1μ 0.1μ 33μ 47μ + * 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. M + -

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 17 QW-R109-009,A CIRCUIT OPERATION

1 H-bridge driver block

(1) Gain setting

• The driver input resistance (ch 1,3 and 4) are 11k Ω typ. ,ch2 is 7.5k Ω typ. . Set the gain according to the following formula. ch1 ch2 ch3 ch2 GV=20 log GV=20 log 55k 11k+R 110k 7.5k+R (db) (db) R:Externally-connected input
• 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 0.1 μF). (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. PWMFIL PSW HVcc 2200pF 100kΩ 47kΩ 44 37 BATT 10pF SBD 47μF 33μH 0.1μF

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 18 QW-R109-009,A

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 R1 + R3 R2· R4 R2 + R4 R2· R4 R2 + R4 (V) 1.2V VSYS1 R1=external resistor R2=external resistor R3=35kΩ R4=21kΩEI (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 ISPRT (sec) (VTH=1.2V,ISPRT=10μA) (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 IOFF (sec)(VTH=1.2V,IOFF=20μA) (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.

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 19 QW-R109-009,A t=CSPRT× VTH IHV (sec)(VTH=1.2V,IHV=20μA)

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. . CHARACTERISTICS Input Load Fluctuation Output Voltage:Vo (V) Input Voltage:Vin (V) 20Ω 0.8-0.2 RL=∞ 8Ω 4Ω 4Ω 8Ω 20Ω *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 20 QW-R109-009,A Input Load Fluctuation (ch2) Input Voltage:Vin (V) 0.8-0.2 RL=﹢ Output Voltage:Vo (V) *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V 20Ω 8Ω 4Ω 4Ω 8Ω 20Ω Dead Zone 0.006 0.004 0.002 -0.002 -0.004 -0.006 -30 -20 -10 10 02 0 3 0 Input voltage: VIN (mV) Output Voltage:Vo(mV) 20Ω 8Ω 20Ω *Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V Error Amp Output Voltage 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 Dead Output voltage E:VDAED (V) Eo Output Voltage:VEO(V) Control Circuit Power Supply voltage:VSYS1(V) Ta=normal temperature BATT=2.4V EOPIN DAED PIN

UTC MM1538 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 21 QW-R109-009,A Resete Pin Voltage 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Reset Output Voltage:VRST (V) Ta=normal temperature BATT=2.4V 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.