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UNISONIC TECHNOLOGIES CO., UA1538
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.
LINEAR INTEGRATED CIRCUIT
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 Package QFP-44-0.8 Packing Tube
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co.,
1
QW-R109-023,B
UA1538
PIN CONFIGURATION
RCHG OUT1R OUT1F OUT2R OUT2F 33 32 31 30 29 POW GND 28 27 26
LINEAR INTEGRATED CIRCUIT
OUT3F OUT3R OUT4F OUT4R BRAKE1 25 24 23
AMUTE 34
22
IN1
EMP 35 HVc c PSW CL K
21
MUTE2
36
20
IN2
37
19
MUTE34
38
18
IN4
START 39
UTC UA1538
17
IN3
OFF 40
16
Vref
CHGVcc 41
15 VSYS2 OP + OPOUT
SEL 42
14
PREGND 43
13
PWMFIL
44
12
VSYS1
1 BSEN
2 BATT
3
4
5 SW
6 EO
7 EI
8 SPRT
9 CT
10 N.C.
11 OP-
RESET DEAD
PIN DESCRIPTION
PIN NO. PIN NAME INPUT/OUTPUT FUNCTION INTERMAL EQUIVALENT CIRCUIT
1
71k 16.5k
10.5k
20 k
1
BSEN
Input
Battery Voltage Monitor
14.85k
2
BATT
Input
Battery Power Supply Input
Power Supply
VSYS1 90k 3
3
RESET
Output
Reset Detect Output
13k
4
DEAD
Input
DEAD Time Setting
4
49k 30.8k
BATT
5
SW
Output
Transistor Drive For Voltage Multiplier
5
150 6k
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QW-R109-023,B
UA1538
PIN NO. PIN NAME INPUT/OUTPUT FUNCTION
LINEAR INTEGRATED CIRCUIT
INTERMAL EQUIVALENT CIRCUIT
VSYS1
6
EO
Output
Error Amplifier Output
6
VSYS1 35k
7
EI
Input
Error Amplifier Input
7 21.6k
VSYS1
8
SPRT
Output
Short Circuit Protection Setting
8
220k
VSYS1
BATT 2k
9
9
CT
Output
Triangular-Wave Output
420k 10k
10
N.C.
14 11
11 14
OPOP+
Input
Op Amp Negative Input Op Amp Positive Input
12
VSYS1
Input
Control Circuit Power Supply Input
Control Circuit Power Supply
VSYS1
13
OPOUT
Output
Op Amp Output
13
15
VSYS2
Input
Driver Pre-step Power Supply
Pre-Drive Power Supply
4 16
24k 50k
16
Vref
Input
Reference Voltage Input
200
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
11k
17 18 20 22
20PIN=7.5k
19 21 23
MUTE34 MUTE2 BRAKE1
Input
Ch3 and 4 Mute Ch2 Mute Ch1 Brake
68k
19 21 23
68k
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3
QW-R109-023,B
UA1538
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
LINEAR INTEGRATED CIRCUIT
INTERMAL EQUIVALENT CIRCUIT
36
24 26 30 32
25 27 29 31
28
950
33
RCHG
Input
Charge Current Setting
33
BATT
34
AMUTE
Output
Reset Invert Output
34
95k
35
35
EMP
Output
Empty Detect Output
BATT
37
37
PSW
Output
PWM Transistor Drive
50
External Clock Synchronizing Input
38
VSYS1 2k
38
CLK
Input
50k 100k
Voltage Multiplier DC-DC Converter Start 39 START Input
39
390k
BATT
200k
VSYS1 180k
40
OFF
Input
Voltage Multiplier Converter OFF
DC-DC
40
27k
41
CHGVcc
Input
Charging Circuit Power Supply Input
Charging Circuit Power Supply
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4
QW-R109-023,B
UA1538
PIN NO. PIN NAME INPUT/OUTPUT FUNCTION
LINEAR INTEGRATED CIRCUIT
INTERMAL EQUIVALENT CIRCUIT
200k BATT
130k
42
SEL
Input/Output
Empty Detect Level Switch
42
15k
43
PREGND
Pre Section Ground
Power
Supply
Pre Section Power Supply Ground
VSYS1 2k
44
PWMFIL
Input
PWM Phase Compensation
44
2k
*The positive and negative outputs are the polarity with respect to the input
BLOCK DIAGRAM
RCHG 33
OUTIR 32
OUT1F 31
OUT2R 30
OUT2F POWGND OUT3F 29 28 27
OUT3R 26
OUT4F 25
OUT4R 24
BRAKE1 23
BRAKE1
AMUTE 34 MUTE2 BTL BTL BTL BTL V / I V / I V / I POWER OFF STARTER V / I TSD PSW 37 MAXIMUM DETECTION CLK 38 CLK
++
22 IN1
EMP 35
21 MUTE2
HVcc 36
20 IN2 MUTE34
CONTROL CIRCUIT POWER SUPPLY
19 MUTE34
+
18 IN4
START 39
+
17 IN3
OFF 40
+
16 Vref
OVER-VOLTAGE
CHGVcc 41
TSD
TRIANGLE WAVE
15 VSYS2
PRE-DRIVER POWER SUPPLY
SEL 42
+ -
14 OP+
++POWER UNIT POWER SUPPLY
+-
PWMFIL 44
+-
1 BSEN
2 BATT
3 RESET
4 DEAD
5 SW
6 EO
7 EI
8 SPRT
9 CT
10 N.C.
11 OP-
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-
PREGND
43
+ -
+
13 OPOUT
12 VSYS1
5
QW-R109-023,B
UA1538
ABSOLUTE MAXIMUM RATINGS (Ta=25 )
LINEAR INTEGRATED CIRCUIT
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 BATT Supply Current (No load) VSYS1 Supply Current (No load) 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 SYMBOL TEST CONDITIONS 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 12 21.5 -2 9 6 1.9 MIN TYP 0 2.5 MAX 3 4.0 4.5 4.1 0.65 14 23.5 0 11 7.5 2.1 240 240 0 0 0 0 400 400 8 50 130 10 0.8 2.0 0.8 0.8 2.0 1.2 5.5 2.00 16 24.5 2 13 9 UNIT A mA mA mA mA dB dB dB k k V mV mV mV mV mV mV V V V V V V V 6
QW-R109-023,B
IST IBAT ISYS1 ISYS2 ICGVCC GVC134 GVC2 GVC RIN134 RIN2 VOUT VsatL VsatU VOI VOO134 VOO2 VDB VBRON VBROFF VM2ON VM2OFF VM34ON VM34OFF VrefON
IN=1.7V and 1.8V IN=1.7V and 1.8V RL=8 ,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
-8 -50 -130 -10 2.0
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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 SW Pin Output Voltage1 "H" SW Pin Output Voltage2 "H" SW Pin Output Voltage2 "L" SW Pin Oscillating Frequency1 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 Interface 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 www.unisonic.com.tw
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 IHLK GPWM IN1=2.1V IN1=1.8V, HVcc-OUT1F HVcc=9.0V, VSYS1=VSYS2=BATT=0V IN1=1.8V, HVcc=1.2 ~ 1.4V MIN TYP MAX 0.8 10 UNIT V mA
4
7
10 0.35
13 0.45 0
17 0.55 5 1/40
mA V A 1/k
1/60
1/50
VS1TH VEOH VEOL VSPR ISPR1 ISPR2 ISPR3 RSPR VSPTH VHVPR
EI=0.7V, Io=-100A EI=1.3V, Io=100A 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
3.05 1.4
3.20 1.6
3.35 0.3
V V V V A A A k V V
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
VSW1H VSW2H VSW2L fSW1 fSW2 fSW3 TSWmin DSW1 DSW2 DSW3
0.78 1.00
0.98 1.50 0.30
1.13
V V
0.45 95 82
V kHz kHz kHz s % % %
65 60
80 70 88.2
0.01 40 70 65 50 80 75
0.60 60 90 85
VOFTH IOFF VSTATH1 VSTATH2 ISTART
EI=1.3V OFF=0V VSYS1=VSYS2=0V, CT=2.0V VSYS1=VSYS2=0V, CT=2.0V START=0V BATT0.3 10 13 2.0 75 95
VSYS12.0 115 BATT1.0
V A V V
20 16
30 19 0.8 10
A V V A 7
VCLKTHH VCLKTHL ICLK CLK=3.2V
UNISONIC TECHNOLOGIES CO., LTD
QW-R109-023,B
UA1538
PARAMETER 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 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 RCHG Pin Output Resistance SEL Pin Leak Current 1 SEL Pin Leak Current 2 SEL Pin Saturation Voltage SYMBOL RDEAD VDEAD
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS MIN 52 0.78 VSYS1=VSYS2=0 3.2V, START=0V START=0V TYP 65 0.88 MAX 78 0.98 UNIT k V
VSTNM VSNHS VDIS VEMPT1 VEMPT2 VEMHS1 VEMHS2 VEMP IEMPL RBSEN IBSENL VSELTH ISELT
2.3 130 1.63 2.1 1.7 25 25
2.5 200 1.83 2.2 1.8 50 50
2.7 300 2.03 2.3 1.9 100 100 0.5 1.0 27 1.0
V mV V V V mV mV V A k V V A
VSEL=0V ISEL=- 2A VSEL=0V ISEL=- 2A Io=1mA, BSEN=1V BSEN=2.4V VSEL=0V VSYS1=VSYS2=0V BSEN=4.5V VSELTH=BATT-SEL BSEN=2.0V
17
23
1.5 -2
HSRT VRSTHS VRST RRST VAMT1 VAMT2 RAMT
Comparison with error amplifier threshold voltage Io=1mA, VSYS1=VSYS2=2.8V Io=-1mA, VSYS1=VSYS2=2.8V Io=-1mA, START=0V, VSYS1=VSYS2=0V
85 25 72 BATT -0.4 BATT -0.4 77
90 50 90
95 100 0.5 108 BATT BATT
% mV V k V V k
95
113
IBIAS VOIOP VOHOP VOLOP ISOU ISIN GVO SR VRCHG RRCHG ISELLK1 ISELLK2 VSELCG
OP+=1.6V RL=OPEN RL=OPEN 50 GND 50 VSYS1 VIN=-75dBV, f=1kHz -5.5 2.8 0
300 5.5 0.2 -3.0
0.4
-6.5 0.7 70 0.5 0.81 0.95
nA mV V V mA mA dB V/ s V k A A V
CHGVcc=4.5V, RCHG=1.8k . CHGVcc=4.5V, RCHG=0.5 and 0.6V CHGVcc=4.5V, RCHG=OPEN, BATT=4.5V CHGVcc=0.6V, RCHG=1.8k , BATT=4.5V CHGVcc=4.5V, Io=300mA, RCHG=0
0.71 0.75
0.91 1.20 1.0 1.0
0.45
1.00
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QW-R109-023,B
UA1538
MEASURING CIRCUIT
V 1.8k A a b SW20 A V V
51k
LINEAR INTEGRATED CIRCUIT
a V b SW19 b SW1 8 a a SW1 7 B b
V a SW21 b
V
V
+ 47 33 47
OUT2R
OUT3R
RCHG
OUTIR
POWGND
OUT4R
OUT1F
OUT2F
OUT3F
OUT4F
b a A V a SW24 A A a SW26 a A 40 OFF A a 42 SEL b V SW27 A b SW25 Va A 10p b SW23 34
BRAKE1
AMUTE
IN1 22
b 35 EMP
MUTE2
21 a V
36 HVcc
IN2
20
37 PSW
MUTE34 19
b a V
38 CLK
IN4
18
b a 39 START
UTC UA1538
IN3 17
b
Vref
16
41 CHGVcc
VSYS2
15
A
1k
OP+
14 V SW12 a
+
43 PREGND
OPOUT 13
10
RESET
44 PWMFIL
BSEN
VSYS1 12 DEAD SPRT N.C EO OPSW Ct EI
b SW28 100 k 2200p
BATT
a b V
A
SW11 50
1
2
3
4
5 SW5 a SW4 V b
6
7 SW6 b a
8
9
10
11
SW10
d c 20k
A
10k
SW9 SW8 b b 470p V aV
ab
100k
+ 470
a A V
frequency
SW1 a + A
SW2 a A V b
SW3 b
a
a V
SW7 b A
a
1M
100
V
10k
V
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A
SW13
V
A
SW14
A
SW15
A
SW16
V
A c a A SW22 33 32 31 30 29 28 27 26 25 24 23
R
F
a
9
QW-R109-023,B
UA1538
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
LINEAR INTEGRATED CIRCUIT
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 -
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QW-R109-023,B
UA1538
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 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
LINEAR INTEGRATED CIRCUIT
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 -
Voltage Gain
Gain Error By Polarity
Input Pin resistance
Maximum Output Voltage
Saturation Voltage (Lower)
Saturation Voltage (Upper)
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 11
QW-R109-023,B
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UA1538
Input Offset Voltage Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 a b b a b b a b b -
LINEAR INTEGRATED CIRCUIT
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
Output Offset Voltage
Dead Zone
-: 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 Ch1 Ch1 Ch2 Ch2 Ch3 Ch4 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 Ch2 Ch3 Ch4 Ch1 SW NO. 17 b b b b b b b b b b b b b b b b b b b b SW NO. 19 a b a b 27 a a b
Vref OFF Voltage
BREAK1 Brake Current PWM Sink Current HVcc Level Shift Voltage HVcc Leak Current PWM Amp Transfer Gain ITEM
13 b b b b -
14 b b b b -
15 b b b b -
16 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 -
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
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QW-R109-023,B
UA1538
SWITCHING POSITION TABLE
LINEAR INTEGRATED CIRCUIT
Input voltage:VIN (mV)
VO4
VO3
VIN1 VIN2 XC'
XC VO2
Dead Zone Output Offset Voltage
VO1
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 VIN2VO1 - VIN1VO2 XC-XC'= VO1-VO2 VIN3VO4 - VIN4VO3 VO3-VO4
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13
QW-R109-023,B
UA1538
APPLICATION CIRCUIT
M
TRAVERSE
LINEAR INTEGRATED CIRCUIT
M
SPINDLE FOCUS TRACKING
OUT2R
OUT1F
33
32
31
30
OUT2F
OUTIR
29
28
27
26
25
24
BRAKE1
OUT3R
RCHG
OUT4R
1.8k
POWGND
OUT3F
OUT4F
23
BRAKE1
AMUTE 34 MUTE2 BTL BTL BTL BTL V / I V / I V / I POWER OFF STARTER V / I TSD MAXIMUM DETECTION CLK
++
IN1 22 MUTE2 21 IN2 20 MUTE34
CONTROL CIRCUIT POWER SUPPLY
EMP 35 HVcc
33
36
47 + 0.1
PSW 47 37 CLK 38 START 39
0.1
MUTE34 19 IN4 18 IN3 17 Vref
+
+
OFF 100k 40 CHGVcc 41 SEL 42 PREGND 43 PWMFIL 44
100k + -
+
16 VSYS2
OVER-VOLTAGE
TSD
TRIANGLE WAVE
15
PRE-DRIVER POWER SUPPLY
OP+ 14 OPOUT 13
-
++-
+-
EI
-
2200p
10p
+
DEAD
BSEN
RESET
SPRT
N.C.
EO
1
BATT
2
3
4
5
6
7
8 0.1
9
10
OP-
SW
CT
11 FILTER
0.1
DC-DC Converter application
VIN 47
+
8.2k VOUT
+
0.022
470p
100
* 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
+
+-
VSYS1 12
14
QW-R109-023,B
UA1538
CIRCUIT OPERATION
1 H-bridge driver block (1) Gain setting *The driver input resistance (ch 1,3 and 4) are 11k following formula.
ch1 55k ch2 GV=20 log 11k+R ch3
LINEAR INTEGRATED CIRCUIT
typ. ,ch2 is 7.5k
typ. . Set the gain according to the
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 (15PIN). Connect a bypass capacitor between these two power supplies (approximately 0.1 F). (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 about 120 typ. .
typ. the output current is cut. The chip starts operating again at
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.
33 H BATT 10pF 100k 2200pF 44 PWMFIL 37 PSW 36 HVcc SBD 47 F + 47k 0.1 F
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.
R1* R3 R2* R4 + R1 + R3 R2 + R4 R2* R4 R2 + R4
VSYS1=1.2x
(V)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
15
QW-R109-023,B
UA1538
VSYS1 12 R1 7 R2 EI R4 1.2V R3 +
LINEAR INTEGRATED CIRCUIT
R1=external resistor R2=external resistor R3=35k R4=21k
(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=10 A) 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=65k )
(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=20 A) 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=20 A) 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
TYPICAL CHARACTERISTIC
Input Load Fluctuation
3 2
LINEAR INTEGRATED CIRCUIT
RL=
Output Voltage:Vo (V)
1
4
0 -1 -2 -3 -0.8
8
20
8
4 20
-0.6 -0.4 -0.2 0 Input Voltage:Vin (V) 0.2
*Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V
0.4 0.6 0.8
Input Load Fluctuation (ch2)
3 Output Voltage:Vo (V) 2 1
RL=
4
0 -1 -2 -3 -0.8
8
20
20
8
4
*Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V
-0.2 0 Input Voltage:Vin (V) 0.2 0.4 0.6 0.8
-0.6
-0.4
Dead Zone
0.006 Input voltage: VIN (mV) 0.004 0.002 0 -0.002 -0.004
*Ta=normal temperature *BATT=HVcc=4V *VSYS1=VSYS2=3.2V *Vref=1.6V 8 20 4
20 8 4
-0.006 -30
-20
-10
0 Output Voltage:Vo(mV)
10
20
30
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
Dead Output voltage E:VDAED (V) Eo Output Voltage:VEO(V)
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
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
Reset Output Voltage:VRST (V)
LINEAR INTEGRATED CIRCUIT
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

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