EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
DESCRIPTION
The M54128 is a semiconductor integrated circuit designed for
high-speed type earth leakage breakers. This lC includes leakage
and abnormal voltage detecting functions.
FEATURES
● lmprovement of ability against unwanted tripping due to Iightning
-surge.
• Adopt the two times counting system.
• lmprovement of ability against needless action due to lightning-
impulse.
● lt is a possible that cope with lEC owing to mode change.
• Adopt the 1.5 times counting system.
● High input impedance :
• Filter circuit can be formed with externally attached C/R.
• lmprovement of ability against needless action due to high
frequency and high harmonics.
● High input sensitivity : VT= 6.5mVrms
● Abnormal voltage detecting (neutral conductor open-phase
protection) function :
• Neutral conductor open-phase protection at single-phase three-
wire system
• ln case of no use this function, stop this function and reduction
of circuit current, possible.
● Low voltage operation : 7 to12V (conventional Mitsubishi
lCs : 12 to 20V)
● Low current dissipation :
• In stand-by condition : 820µA typical (Vs = 9V, Ta = 25°C)
• When SCR is ON : 740µA typical (Vs = 9V, Ta = 25°C)
● Highly stable design : Employment of circuits of which
characteristics fluctuations resulting from changes in supply
voltage/ambient temperature are small.
APPLICATION
Earth leakage breaker
RECOMMENDED OPERATING CONDITIONS
Supply voltage range • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • 7 to12V
Operating ambient temperature• • • • • • • • • • • • • • • • • • • • • • • • -20 to +85°C
BLOCK DIAGRAM
PIN CONFIGURATION (TOP VIEW)
Outline 14P5A
14
11
12
13
1
4
3
2
105
96
87
M54128FP
1
4
5
3
2
6
7
8
9
10
11
12
13
14
M54128L
Outline 14P2N-A
VS
VCC
PSAV
IBLI
TTDC
OFFC
SCRT
GND
IREF
VREF
ILKI
TRC1
TRC2
PSEL
SCRT
OFFC
TTDC
IBLI
PSAV
VCC
VS
GND
IREF
VREF
ILKI
TRC1
TRC2
PSEL
VSVCC PSAV IBLI TTDC OFFCSCRT
PSELTRC2TRC1ILKIVREFIREFGND
Power suppl
y
circuit
Abnormal voltage
detection SCR-driver
Leakage detection
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
Power supply
Output pin of internal constant-voltage circuit. Connects to capacitor for decoupling.
Connects to resistor which sets constant current of each internal circuit. Approx. 1.3V.
Grounding
When in normal use, connect the pin to VCC pin. When the abnormal voltage detection function is not in use,
ground the pin. Circuit current can be reduced. Ground I BLI pin and TTDC pin also.
Input reference level pin of the leakage detection circuit. Approx. 2.7V.
Another input pin of the leakage detection circuit.
Connects to capacitor for integrating output signals of the leakage input signal level discriminator.
Connects to condeser for removing noise.
Logic function switching pin used when detecting leakage.
When the pin is grounded, SCRT operates with the logic flow of negative input →positive input →
negative input.
When it is connected to VCC pin, SCRT operates with the logic flow of negative input →positive input.
This IC will be restored to the initial condition after the specified period if :
leakage input signal does not continue ; abnormal voltage input signal does not continue ; or
leakage/abnormal voltage is detected and SCR becomes ON.
The pin connects to capacitor for time settinng of this function.
Input pin of the abnormal voltage detection circuit.
Connects to capacitor for time setting of the abnormal voltage detection circuit.
Output pin for drive a SCR.
PIN FUNCTION DESCRIPTION
Function
Common
Leakage detection, abnormal voltage detection, SCR drive circuits
Pin No. Pin name
LFP
1
3
4
5
6
7
8
9
10
11
12
14
13
2
8
10
11
9
7
6
5
4
3
12
1
2
13
14
VS
VCC
IREF
GND
PSAV
VREF
ILKI
TRC1
TRC2
PSEL
OFFC
IBLI
TTDC
SCRT
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
I/O EQUIVALENT CIRCUIT
11-stages
VS
200
BAND GAP
1.3V
VCC
IREF
External R
(
130k
)
VREF
ILKI
2.7V
150
500
350
6-stages
VCC
2.5V
10
µ
A
100
OFFC
TRC1
TRC2
10
µ
A
µ
A
T
TDC
100
VCC
2.5V
IBLI
7-stages
2k 200k
3k
SCRT
800
50k 2k
PSAV PSEL
2k
8
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C, unless otherwise noted)
S
y
mbol ConditionsParameter
IS
Ratings Unit
Source current
Max. supply voltage
Input voltage
Input current
Input current
Input voltage
Input current
Power dissipation
Operating temperature
Storage temperature
VS MAX
∆VIL
IIL
IIG
VIBL
IIBL
Pd
Topr
Tst
g
ILKI - VREF
ILKI - VREF
VREF - GND
IBLI - GND
IBLI - GND
TYPICAL CHARACTERISTICS
4
15
-1.4 to +1.4
-5 to +5
10
-0.3 to +4.0
4
200
mA
V
V
mA
mA
mA
mW
-20 to 85
-55 to125
V
°C
°C
250
200
150
100
50
00 25 50 75 100 125 150
Thermal derating
Power dissipation Pd(mW)
Ambient temperature Ta(°C)
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
IS3
Source current: In stand-by condition
Source current: While detecting leakage
Source current: While detecting abnormal voltage
Source current: Immediately after driving of SCR
Source current: In stand-by condition
Source current: While detecting leakage
Source current: Immediately after driving of SCR
ISO variation with ambient temperature
Maximum current voltage
Leakage detecting DC input voltage
ILKI pin input bias current
VREF pin output voltage
ILKI-VREF input clamp voltage
VREF-GND clamp voltage
TRC1 pin “H” output current precision
TRC1 threshold voltage
TW1 pulse width precision
TW1 variation with ambient temperature
TRC2 pin “H” output current precision
TRC2 threshold voltage
TW2 pulse width precision
TW2 variation with ambient temperature
Total leakage detecting AC voltage
VTvariation with ambient temperature
Abnormal voltage detecting voltage
VBLT variation with supply voltage
VBLT variation with ambient temperature
IBLI pin input bias current
IBLI-GND clamp voltage
TTDC pin “H” output current precision
TTDC threshold voltage
Delay time pulse width precision
OFFC pin “H” output current precision
OFFC threshold voltage
Reset timer pulse width precision
SCRT pin “L” output voltage
SCRT pin “H” output current
IOH holding supply voltage
ELECTRICAL CHARACTERISTICS (Ta = 25°C, unless otherwise noted)
Test conditions
Parameter
Power supply circuit
Leakage
detection
circuit
2ms
circuit
1ms
circuit
Abnormal voltage
detecting circuit
Reset
circuit
SCR drive
circuit
Symbol
IS0
IS1
IS2
IS0'
IS1'
IS3'
–
VS max
Vion
IIH
VO
VILKI
VRCL
EIOH
VTH
ETW1
–
EIOH
VTH
ETW2
–
VT
–
VBLT
–
–
IIBLT
VIBLC
EIOH
VTH
ETW4
EIOH
VTH
ETW3
VOL8
IOHc
IOHn
IOHh
Vsoff
PSAV = VCC
PSAV = GND
Ta = -20 to 85°C
IS= 4mA
ILKI -VREF
VIN = VREF
IILKI = ±3mA
IRCL = 5mA
VO= 0V : IOH = -10.4µA
C = 0.01µF : TW1 = 2.3ms
Ta = -20 to 85°C
VO= 0V : IOH = -10.4µA
C=
0.0047µF
:
TW2
=
1.1ms
Ta = -20 to 85°C
60Hz
Ta = 25 →85°C
Ta = 25 →-20°C
Ta = -20 to 85°C
VIN = VREF
IIN = 1mA
VO= 0V : IOH = -8µA
C = 1.0µF : TW4 = 300ms
VO= 0V : IOH = -10µA
C = 0.33µF : TW3 = 55ms
IOL = 200µA
VO= 0.8V
Limits
Min. Typ. Max. Unit
820 950570
µ
A
840 950570
µ
A
810 950570
µ
A
740 870520
µ
A
740 870520
µ
A
760 870520
µ
A
740 870520
µ
A
-0.07 ––%/°C
13.9 15–V
±7.5 –– mVdc
215–nA
2.7 ––V
±1.2 ––V
4.6 ––V
–20-20 %
2.4 ––V
–15-15 %
-0.06 ––%/°C
–20-20 %
2.4 ––V
–15-15 %
-0.06 ––%/°C
6.5 –– mVrms
-4.0 ––%
-4.0 ––%
2.4 2.62.2 V
0.01 –– %/V
0.06 ––%/°C
120 300–nA
7.2 ––V
–20-20 %
2.4 ––V
–30-30 %
–20-20 %
2.4 ––V
–30-30 %
0.1 0.2–V
-260 –-200
µ
A
-220 –-100
µ
A
-180 –-70
µ
A
9V
9V
9V
–
9V
9V
9V
9V
9V
9V
–
9V
9V
9V
9V
9V Ta = -20°C
Ta = 25°C
Ta = 85°C– 3.0 4.5 V–
VS
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
EARTH LEAKAGE DETECTION
ILKI input
TRC1 pin
TRC2 pin
OFFCpin
SCR output
SCR output
ABNORMAL VOLTAGE DETECTION
IBLI input
OFFCpin
TTDC pin
SCR output
2.4V
2.3ms
2.4V
2.4V
0.7V
55ms
55ms
2.4V
55ms
300ms
2.4V
2.4V
✽When PSEL = GND
✽When PSEL = VCC
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
PRECAUTIONS FOR APPLICATION
Note that the improvement examples in the following precautions
for application of M54128FP/L are merely examples.
1. VS applied voltage
(1) ls circuit current (clamp circuit characteristics of the
equivalent circuit) is as shown in TYPlCAL CHARAC-
TERISTICS figure 1 on page 9. Attention should be given to
the circuit current when designing the power supply circuit.
(2) Use of the lC by rectifying commercial power supply
a) As Vz, be sure to use zener diode of 12V or less (not
exceeding the absolute maximum rating of 15V).
b) At high temperatures, clamp voltage decreases and ls
increases. lncrease of ls will be restricted at Rs, however.
(3) lf normal DC power supply is used, use the lC at Vs=7to10V.
2. Resistor of IREF pin (R = 130kΩ)
Reference constant current source of the lC (for restraining
fluctuations in supply voltage characteristics and ambient
temperature characteristics).
Since this resistor determines the characteristics of each circuit,
use of high-precision resistor (±2%) is recommended.
3. Layout of printed circuit board
External noise (noise simulator etc.) may cause faulty operation
of the lC.
To improve the noise immunity, layout the printed circuit board
so that the wiring of the external C and R is made as short as
possible.
Special attention should be given to the wiring of the condensers
connected to Vs, Vcc and SCRT pins.
4. Be careful that the voltage of SCRT output pin does not
become lower than the GND level.
5. Change in sensitivity due to insulation deterioration
If the insulation of ZCT input pin from the high voltage part might
deteriorate, improvement might be expected by connecting a
resistor of about R=100kΩbetween VREF pin and GND.
It should be noted that the circuit current will increase at
I 2.7V/R (approx.).
6. Clamp diode of IBLI input pin
As shown in the equivalent circuit, it is made up of series resistor
(approx. 2kΩ) and seven stages of forward diode.
(1) At high temperatures, the drop in diode VFmay decrease
the clamp voltage of the pin. If the voltage approaches the
reference level of the comparator (2.4V) and current leaks
occur, the overvoltage detection level may slightly fluctuate.
Form the detection circuit as the figure below. It is
recommended that R1, R2and VZbe set as shown below.
(2) During excessive input, as shown above, setting should be
made so that the input pin voltage becomes 4.3V or lower
(to prevent the saturated comparator circuit from operating).
• VZ4.0V
=
• R1+ R2> 200kΩ
• Ω
R1x R2
R1+ R2
Commercial
power supply
RSVS
VZ
IC IBLI pin
Input R1
R2 VZ
=
< 7k
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
7. Reset time in reset circuit
This circuit is designed as a timer circuit of V L = 0.7V, VH = 2.5V
and lo = 10µA. When SCR is ON, the power supply route of the
leakage detection and abnormal voltage detection circuits are
shut off, VL does not drop to 0.7V as shown below and therefore
reset time may become shorter.
Set the reset time somewhat longer in advance.
8. Application of leakage detection function to time delay
function
As shown in the figure below, by applying the neutral conductor
open-phase protection function, it is possible to provide the
leakage detection function with time delay function (several
100ms). ln this case, however, the neutraI conductor open-
phase protection function disappears. Pin No. in parentheses
are of L type.
T = = 55ms
0.33µF x (2.4 - 0.7)
10µA
C x (VH- VL)
I=
Note. t : time shorter than setting value
• ln the case of leakage detection :
May become 10ms (50Hz) shorter
• ln the case of abnormal voltage detection :
May become 20ms (50Hz) shorter
OFFCpin waveform
0.7V
2.4V
0V
SCRT pin waveform
55ms
t = 10 – 20ms
3.1V
VCC PSAV IBLI TTDC
TRC1 TRC2
VCC PSAV IBLI TTDC
TRC1 TRC2
(
Example 2
)
(
Example 1
)
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
TYPICAL CHARACTERISTICS
Source Current vs. Supply Voltage
Source current (mA)
Supply voltage (V)
4
3
2
1
00 5 10 15
85°C
-20°C
25°C
When standing by
Source Current vs. Supply Voltage
Source current (µA)
Supply voltage (V)
1000
900
800
700
6006 8 10 12
Ta= 25°C
When detecting leakage
When standing by
When SCR ON
Source Current vs. Ambient Temperature
Source current (µA)
Ambient temperature (°C)
1000
900
800
700
600
-50 0 50 100
VS= 9V
When detecting leakage
Source Current vs. Ambient Temperature
Source current (µA)
Ambient temperature (°C)
1000
900
800
700
600
-50 0 50 100
VS= 9V
When standing by
Source Current vs. Ambient Temperature
Source current (µA)
Ambient temperature (°C)
1000
900
800
700
600
-50 0 50 100
VS= 9V
When detectin
g
abnormal volta
g
e
Source Current vs. Ambient Temperature
Source current (µA)
Ambient temperature (°C)
1000
900
800
700
600
-50 0 50 100
VS= 9V
When SCR ON
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
VREF Output Voltage vs. Ambient Temperature
IREF Output Voltage vs. Ambient Temperature
IREF output voltage (V)
Ambient temperature (°C)
1.5
1.4
1.3
1.2
1.1
-50 0 50 100
VS= 9V
VREF output voltage (V)
Ambient temperature (°C)
2.9
2.8
2.7
2.6
2.5
-50 0 50 100
VS= 9V
VCC Output Voltage vs. Ambient Temperature
VCC output voltage (V)
6.0
5.5
5.0
4.5
4.0
-50 0 50 100
VS= 9V
Ambient temperature (°C)
VCC Output Voltage vs. Supply Voltage
VCC output voltage (V)
6.0
5.5
5.0
4.5
4.0 681012
Ta= 25°C
Supply voltage (V)
VREF Output Voltage vs. Supply Voltage
VREF output voltage (V)
2.9
2.8
2.7
2.6
2.5 681012
Ta= 25°C
Supply voltage (V)
IREF Output Voltage vs. Supply Voltage
IREF output voltage (V)
1.5
1.4
1.3
1.2
1.1 681012
Ta= 25°C
Supply voltage (V)
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage
vs. Ambient Temperature
TRC1,2 “H” Output Current vs. Ambient Temperature
TRC1,2 “H” output current (µA)
Ambient temperature (°C)
12
11
10
9
8
-50 0 50 100
VS= 9V
TRC1,2 “H” Output Current vs. Supply Voltage
IRC1,2 “H” output current (µA)
12
11
10
9
8681012
Ta= 25°C
Supply voltage (V)
Threshold voltage (V)
Ambient temperature (°C)
3.0
2.5
2.0
-50 0 50 100
VS= 9V
TRC1 Pulse Width vs. Ambient Temperature
TRC1 pulse width (ms)
3
2
-50 0 50 100
Ambient temperature (°C)
VS= 9V
TRC1 = 0.01
µ
F
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage
vs. Supply Voltage
Threshold voltage (V)
3.0
2.5
2.0 681012
Ta= 25°C
Supply voltage (V)
TRC1 pulse width (ms)
3
2
681012
Supply voltage (V)
Ta= 25°C
TRC1 = 0.01
µ
F
TRC1 Pulse Width vs. Supply Voltage
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
Total Leakage Detection AC Voltage
vs. Ambient Temperature
Ambient temperature (°C)
8
7
6
5
4
-50 0 50 100
Total Leakage Detection AC
Voltage vs. Supply Voltage
Total leakage detection AC voltage (mVrms)
8
7
6
5
4681012
Supply voltage (V)
TTDC “H” Output Current vs. Ambient Temperature
TTDC “H” output current (µA)
Ambient temperature (°C)
10
8
6
-50 0 50 100
VS= 9V
TTDC Pulse Width vs. Ambient Temperature
TTDC pulse width (ms)
300
-50 0 50 100
Ambient temperature (°C)
VS= 9V
TTDC = 1.0
µ
F
TTDC “H” Output Current vs. Supply Voltage
TTDC “H” output current (µA)
10
8
6681012
Ta= 25°C
Supply voltage (V)
TTDC pulse width (ms)
300
250 681012
Supply voltage (V)
Ta= 25°C
TTDC = 1.0
µ
F
TTDC Pulse Width vs. Supply Voltage
9
7
350
Ta= 25°C
TRC1 = 0.01µF
fin = 60Hz
VS= 9V
TRC1 = 0.01µF
fin = 60Hz
Total leakage detection AC voltage (mVrms)
9
7
350
250
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
OFFC“H” Output Current vs. Supply Voltage
OFFC“H” output current (µA)
Supply voltage (V)
12
11
10
9
86 8 10 12
Ta= 25°C
OFFC“L” Output Voltage vs. Supply Voltage
OFFC “L” output voltage (V)
Supply voltage (V)
1.2
1.0
0.8
0.6
0.46 8 10 12
Ta= 25°C
OFFCPulse Width vs. Supply Voltage
OFFCpulse width (ms)
Supply voltage (V)
80
70
60
50
406 8 10 12
Ta= 25°C
OFFC= 0.33
µ
F
OFFC“H” Output Current vs. Ambient Temperature
OFFC“H” output current (µA)
Ambient temperature (°C)
12
11
10
9
8
-50 0 50 100
VS= 9V
OFFC“L” Output Voltage vs. Ambient Temperature
OFFC“L” output voltage (V)
Ambient temperature (°C)
1.2
1.0
0.8
0.6
0.4
-50 0 50 100
VS= 9V
OFFCPulse Width vs. Ambient Temperature
OFFCpulse width (ms)
Ambient temperature (°C)
80
70
60
50
40
-50 0 50 100
VS= 9V
OFFC= 0.33
µ
F
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
SCRT “L” Output Voltage vs. “L” Output Current
SCRT “L” output voltage (V)
“L” output current (µA)
0.4
0.3
0.2
0.1
00 200
VS= 9V
Ta= 25°C
400 600 800 1000 1200
SCRT “L” Output Voltage vs. “L” Supply Voltage
SCRT “L” output voltage (V)
Supply voltage (V)
0.4
0.3
0.2
0.1
06
Ta= 25°C
IOL = 200
µ
A
81012
SCRT “H” Output Current vs. Supply Voltage
SCRT “H” output current (µA)
Supply voltage (V)
400
300
200
100
00
Ta= 25°C
48122610
SCRT “L” Output Voltage vs. Ambient Temperature
SCRT “L” output voltage (V)
Ambient temperature (°C)
0.4
0.3
0.2
0.1
0
-50
VS= 9V
IOL = 200
µ
A
0 50 100
SCRT “H” Output Current vs. Ambient Temperature
SCRT “H” output current (µA)
Ambient temperature (°C)
400
300
200
100
0
-50 0 50 100
VS= 9V
EARTH LEAKAGE CURRENT DETECTOR
M54128L/FP
MITSUBISHI <CONTROL / DRIVER IC>
APPLICATION EXAMPLE
✽An implementation example, which should be fully examined.
AC-LINE
VSVCC
PSAV
T. Coil SCR
IBLI TTDC OFFCSCRT
M54128L/FP
IREF VREF ILKI TRC1 TRC2
PSEL
GND
Z
C
T
Power suppl
y
circuit
Abnormal voltage
detection SCR driving
Earth leakage detection
MZ Core Series by Soryo Denshi Kagaku Co., Ltd (Mitsubishi Subsidiary)
Tel. +81-427-74-7813
Note :
Note
