UTC M54123L LINEAR INTEGRATED CIRCUIT
EARTH LEAKAGE CURRENT
DETECTOR
DESCRIPTION
The UTC M54123L is a semiconductor integrated
circuit with amplifier for a high-speed earth leakage
circuit breaker.
SOP-8
FEATURES
*Suitable for JIS C 8371
*Good temperature characteristics of input sensitivity
current
*High input sensitivity (VT=6.1mV Typ.)
*Low external component count
*High noise and surge-proof
*Low power dissipation (Pd=5mW Typ.) and may be
used both as 100V and 200V.
*Wide temperature range (Ta=-20~+80°C)
DIP-8
SIP-8
APPLICATION
*High speed earth leakage circuit breaker.
FUNCTION
The UTC M54123L circuit for the amplifying parts of earth leakage circuit breaker consists of differential
amplifier, latch circuit and voltage regulator. It is connected to the secondary side of the zero current transformer
(ZCT) which detects leakage current in the both input of the differential amplifier. Signals amplified by differential
amplifier are integrated by an external capacitor, and connects to the input terminal of latch circuit with output
suitable for the characteristics of high- speed earth leakage circuit breaker. Latch circuit keeps low in the output till
the input voltage reaches the fixed level, and output becomes high when the leakage current more than fixed flows.
It drives a thyristor connected to the output terminal of latch circuit.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS (TOP VIEW)
BLOCK DIAGRAM
latch circuit
Reference voltage generator
Vs 8
+
AMP
-
7 Os output
GND 3
1
VR
Reference voltage
UTC
2
IN
Input
4
OD
Differential
amplifier output
5
6
Sc
Latch
input
NR
Terminal for noise
absorption
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=-20~80°C, unless otherwise noted)
PARAMETER
SYMBOL
Supply current
VR pin current
CONDITIONS
RATINGS
UNIT
Is
8
mA
Between VR-IN (Note 1)
250
IVR
mA
Between VR-GND
30
Between IN-VR(Note 1)
-250
IN terminal current
Between IN-VR(Note 1)
250
IIN
mA
Between IN-GND
30
Between VR-IN (Note 1)
-250
Sc terminal current
Isc
5
mA
Power dissipation
Pd
200
mV
Operating temperature
Topr
-20 to +80
°C
Storage temperature
Tstg
-55 to +125
°C
Note 1: Current value between VR and IN, and between IN and VR is less than 1ms in the pulse width, and duty
cycle is less than 12%, In applying AC current continuously, it is 100 mA in the off-state.
Remarks: GND terminal (pin 3 of the circuit is a basis of all the voltage except differential input clamp voltage of DC
electrical characteristics, and direction of current is plus(no signal) in flowing into the circuit and is
minus(-signal)in flowing out of it. Maximum value and minimum one are shown as absolute value. Please
do not apply voltage whose standard is GND terminal in VR and IN pin.
RECOMMENDED OPERATING CONDITIONS (Ta=-20~+80°C, unless otherwise noted)
PARAMETER
SYMBOL
Supply Voltage when latch circuit is
off-state
External capacitor between Vs and GND
External capacitor between Os and GND
Is
Cvs
Cos
LIMITS
MIN
12
UNIT
TYP
MAX
V
µF
µF
1
1
ELECTRICAL CHARACTERISTICS (Ta=-20~+80°C, unless otherwise noted)
PARAMETER
SYMBOL
TEST CONDITIONS
LIMITS
TEMPERA
TEST
-TURE
CIRCUIT
MIN
TYP*
UNIT
MAX
(°C)
Is1
Supply current
Trip voltage
VT
Timed current1
ITD1
Timed current2
ITD2
Output current
Io
Sc “ON” voltage (Note3)
Sc input current
Output low-level current
Input clamp voltage
UTC
VSC”ON”
ISC”ON”
Iosl
VIC
Vs=12V,VR-V1=30mV
-20
25
80
Vs=16V, VR-V1(Note2) -20~+80
Vs=16V, VR-V1=30mV
25
VOD=1.2V
Vs=16V, short circuit
25
between VR and V1,
VOD=0.8V
IS1=580µA
-20
VSC=1.4V,
IS1=530µA
25
VOS=0.8V,
80
IS1=480µA
Vs=16V
25
Vs=12V
25
Vs=12V,Vosl=0.2V
-20~+80
Vs=12V, IIC=20mA
-20~+80
1
1
1
2
4
3
µA
580
530
480
9
mV
-12
-30
µA
4
17
37
µA
5
5
5
6
7
8
9
-200
-100
-75
0.7
400
200
4.3
6.1
µA
1.4
5
6.7
UNISONIC TECHNOLOGIES CO., LTD.
V
µA
µA
V
3
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
TEST CONDITIONS
LIMITS
TEMPERA
TEST
-TURE
CIRCUIT
MIN
TYP*
UNIT
MAX
(°C)
Differential input clamp
voltage
Maximum current voltage
Supply current 2(Note 4)
VIDC
IIDC=100mA
-20~+80
10
0.4
2
V
VSM
IS2
ISM=7mA
VR-V1, Vos=0.6V
25
-20~+80
11
12
20
28
900
V
µA
(Note 5)
Latch circuit is off-state
25
13
0.5
V
VS ”OFF”
supply voltage (Note6)
Operating time (Note 7)
TON
Vs=16V,VR-V1=0.3V
25
14
2
4
ms
*: Typical values are at Ta=25°C.
Note 2: When standard value of voltage (60Hz) between VR and VI is minimum, and output Os is low-level, or when
standrd value of voltage(60Hz)between VR and VI is maximum, and output Os is high-level, it is considered
as a good one.
Note 3: When standard value of voltage VSC”ON” is minimum, and output Os is low-level, or when standard value of
voltage VSC”ON” is maximum, and output Os is high-level, it is considered as a good one.
Note 4: Supply current 2 is necessary to keep high in output Os.
Note 5: After applying 30mV between VR and VI and shorting between them,it is considered as a good one if
standard value of IGT flows out of output Os
Note 6: After supply voltage applies 12V and output Os is high-level,it is considered as a good one in the standard
value of supply voltage and in the low-level of output Os.
Note 7: Operating time is a time from applying fixed input till operating latch circuit in 0.047µF between OD and
GND.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
1
3
2
VR IN GND OD Sc NR Os Vs
1
2
3
4
5
100
VI
6 7
Open
8
Vs
Vsm
0.047
0.047
1
2
100
1K
3
VI
4
4
5
6 7
Open
0.047 vos
µF
µF
VR IN GND OD Sc NR Os Vs
VR IN GND OD Sc NR Os Vs
Is
µF
8 Vs
1
µF
µF
1
2
3
4
5
100
6 7
Open
1
2
3
4 5 6 7
Open Open
Open
VOD
VI
0.047
3K
0.047
0.047
µF
ITD2
µF
７
Vsc
1
2
3
100
4 5 6 7
Open Open
Vos
Isc“
1
2
0.047
3
VI
µF
µF
ON”
Vos
1
2
3
4
5
6
7
IIDC
µF
4 5 6 7
Open Open
3K Vos
0.047
µF
8 Vs
0.047
Vsc
µF
“ ON”
0.047
µF
4 5 6 7
Open Open
IosL
VosL
VR IN GND OD Sc NR Os Vs
8 Vs
1
2
3
100
0.047
0.047
4 5 6 7
Open Open
IIC
µF
8 Vs
0.047
VIC
µF
0.047
µF
12
1
2
3
100
Open
3
VI
µF
VR IN GND OD Sc NR Os Vs
8
2
0.047
µF
µF
VR IN GND OD Sc NR Os Vs
0.047
0.047
µF
100
11
10
8 Vs
9
100
0.047
VI
1
Is
VR IN GND OD Sc NR Os Vs
8 Vs
VOD
6 7
Open
VR IN GND OD Sc NR Os Vs
8
8
VR IN GND OD Sc NR Os Vs
5
6
VR IN GND OD Sc NR Os Vs
8 Vs
3 4
ITD1
VI
0.047
0.047
5
VR IN GND OD Sc NR Os Vs
2
100
4 5 6 7
Open Open
VI
VIDC
0.047
VR IN GND OD Sc NR Os Vs
8
Ism
Vsm
0.047
µF
µF
1
2
100
VI
3
4
5
6 7 8
Open Vos
Is2
0.047 0.047 IGT 0.047
µF
µF
µF
14
13
VR IN GND OD Sc NR Os Vs
1
2
3
4
5
100
VI
UTC
6 7
Open
8
VR IN GND OD Sc NR Os Vs
Vs
"OFF"
µF
2
3
4
5
100
0.047 0.047 Vos 0.047
µF
1
µF
VI
6 7
Open
0.047 0.047
µF
µF
8 Vs
0.047
µF
Note: The unit of resistance is ohm.
Please insurt 0.01 µFbetween pin
1 and pin 3 in test
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Vcc voltage vs.supply voltage
Supply current 1 vs.supply voltage
700
12
Vcc voltage Vcc(V)
10
Supply current 1 Is1(μ A）
Ta=-25℃
25℃
8
75℃
6
4
2
10
12
14
16
18
500
20
Ta=-25℃
400
25℃
300
75℃
200
100
0
0
8
600
5
10
Supply voltage Vs(V)
15
20
25
30
Supply voltage Vs（V）
Vcc voltage generates by the constant voltage circuit in IC.
This is measured not by M54123L but by a special element.
Bias current vs。ambient temperature
Reference voltage vs.supply voltage
2.5
1000
900
800
2.0
-25℃
25℃
1.5
1.0
0.5
Bias current IIN（nA）
Reference voltage VR （V）
Ta=75℃
700
600
500
400
300
200
100
0
0
4
8
12
16
0
-40 -20
20
Supply voltage Vs(V)
60
80
100
-50
Timed current 1 ITD1（μ A）
Differential amplifier output voltage V OD（V）
40
Timing current vs. ambient temperature
2.5
2.0
1.5
1.0
Ta=75℃
0.5
-25℃
25℃
0
6
7
8
9
10
Differential input voltage △ VI=VR-VIN（mV）
UTC
20
Ambient temperature Ta（℃）
Differential amplifier output voltage
vs. differential input voltage
5
0
-40
-30
-20
-10
0
-40 -20
0
20
40
60
80
100
Ambient temperature Ta（℃）
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
Os voltage vs.Sc voltage
Operating tim e vs. a mbient temperature
4.5
Ta=75℃ 25℃ -25℃
6
Operating time TON (ms)
Os voltage Vos(V)
8
4
2
0
0.4
0.6
0.8
1
1.2
1.4
1.6
4
3.5
3
2.5
2
-50
1.8
Sc voltage Vsc(V)
0
25
50
75
100
Ambient temperature Ta（℃）
Trip voltage vs. a mbient temperature
Output current vs. Os output votltage
10
-400
Ta=-25℃
8
Trip voltage VT(mVrms)
Output current Io（μ A）
-25
-300
25℃
75℃
-200
-100
0
0
1
2
3
4
5
Os output voltage Vos(V)
UTC
6
7
6
4
2
0
-50
-25
0
25
50
75
100
Ambient temperature Ta（℃）
UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
HIGH-SPEED LEAKAGE CIRCUIT BREAKER WITH UTC M54123L
Amplifier
Supply voltage circuit
Output circuit
UTC M54123L
Trip
coil
AC
line
R2 Vs
8
C4
Voltage
regulator
Reference
voltage
generator
Latch
circuit
+
AMP
-
3
GND
1
RL
C6
AC
line
4
2
RP
100Ω
5
C1
6
7
C3
C2
Note 8
SCR
CR2AM
CR03AM
CRO2AM
R1
C5
ZCT
Note 8:Gate current must be selected.
Please select voltage resistance by AC supply voltage
Operating time vs.input voltage
1000
700
500
C1=0.047μ F
Ta=25℃
60Hz
Operating time tD (ms)
300
100
70
50
30
10
7
5
3
1
1
3 5 710
30 5070100 300500 1000
Input voltage V1 (mVrms)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
8
QW-R122-001,B
UTC M54123L LINEAR INTEGRATED CIRCUIT
Supply voltage circuit is connected as a previous diagram. Please decide constants R1, R2, C4, and C5 of a filter
in order to keep at least 12V in Vs, when normal, supply current flows.
In this case, please connect C4 (more than 1μF) and C2（less than 1μF）. ZCT and load resistance RL of ZCT are
connected between input pin 1 and 2. In this case protective resistance （Rp=100Ω）must be insurted. Sensitivity
current is regulated by RL, and output of amplifier shows in pin 4. External capacitor C1 between pin 4 and GND is
used for noise removal.
When large current is grounded in the primary side （AC line）of ZCT, the wave form in the secondary side of ZCT
is distorted and some signals does not appear in the output of amplifier. So please connect a varistor or a diode （2
pcs）to ZCT in parallel.
Latch circuit is used to inspect the output level of amplifier and to supply gate current on the external SCR. When
input pin becomes more than 1.1V（Typ.），latch circuit operate and supply gate current in the gate of SCR
connected to the output pin 7. Pin 6 can be used in the open state，but please connect capacitor（about 0.047μF）
between pin 6 and pin 7.
Capacitor C6 between pin 1 and GND is used to remove noise and is about 0.047μF.
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.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R122-001,B