Mitsubishi M54128 Earth leakage current detector Datasheet

MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
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
14 VS
IREF 2
13 VCC
VREF 3
ILKI 4
TRC1 5
M54128FP
● lmprovement of ability against unwanted tripping due to Iightning
-surge.
• Adopt the two times counting system.
• lmprovement of ability against needless action due to lightningimpulse.
● 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 threewire 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.
GND 1
12 PSAV
11 IBLI
10 TTDC
TRC2 6
9 OFFC
PSEL 7
8 SCRT
Outline 14P2N-A
SCRT 1
OFFC 2
TTDC 3
IBLI 4
PSAV 5
VCC
VS 7
GND 8
M54128L
6
9
IREF
VREF 10
ILKI 11
APPLICATION
TRC1 12
Earth leakage breaker
TRC2 13
RECOMMENDED OPERATING CONDITIONS
PSEL 14
Supply voltage range • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • 7 to12V
Operating ambient temperature • • • • • • • • • • • • • • • • • • • • • • • • -20 to +85°C
Outline 14P5A
BLOCK DIAGRAM
VS
VCC
PSAV
IBLI
TTDC
Abnormal voltage
detection
OFFC
SCRT
SCR-driver
Power supply circuit
Leakage detection
GND
IREF
VREF
ILKI
TRC1
TRC2
PSEL
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
PIN FUNCTION DESCRIPTION
Pin No.
L
FP
Common
Pin name
7
14
6
13
9
2
8
1
VS
VCC
IREF
GND
5
12
PSAV
Function
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 IBLI pin and TTDC pin also.
Leakage detection, abnormal voltage detection, SCR drive circuits
10
3
VREF
Input reference level pin of the leakage detection circuit. Approx. 2.7V.
11
4
Another input pin of the leakage detection circuit.
ILKI
12
5
Connects to capacitor for integrating output signals of the leakage input signal level discriminator.
TRC1
13
6
Connects to condeser for removing noise.
TRC2
Logic function switching pin used when detecting leakage.
When the pin is grounded, SCRT operates with the logic flow of negative input → positive input →
14
7
PSEL
negative input.
When it is connected to VCC pin, SCRT operates with the logic flow of negative input → positive input.
2
9
OFFC
4
11
3
10
1
8
IBLI
TTDC
SCRT
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.
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
I/O EQUIVALENT CIRCUIT
VCC
VS
200
2.7V
500
VREF
ILKI
11-stages
350
150
BAND GAP
1.3V
6-stages
IREF
External R (130k)
VCC
10µA
8 µA
10µA
2.5V
100
100
OFFC
TRC1
TTDC
TRC2
VCC
800
2.5V
200k
2k
IBLI
3k
7-stages
SCRT
50k
2k
PSAV
2k
PSEL
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C, unless otherwise noted)
Symbol
IS
VS MAX
∆VIL
IIL
IIG
VIBL
IIBL
Pd
Topr
Tstg
Parameter
Conditions
Source current
Max. supply voltage
Input voltage
Input current
Input current
Input voltage
Input current
Power dissipation
Operating temperature
Storage temperature
ILKI - VREF
ILKI - VREF
VREF - GND
IBLI - GND
IBLI - GND
TYPICAL CHARACTERISTICS
Thermal derating
Power dissipation Pd (mW)
250
200
150
100
50
0
0
25
50
75
100
125
Ambient temperature Ta (°C)
150
Ratings
4
15
-1.4 to +1.4
-5 to +5
10
-0.3 to +4.0
4
200
-20 to 85
-55 to125
Unit
mA
V
V
mA
mA
V
mA
mW
°C
°C
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
ELECTRICAL CHARACTERISTICS (Ta = 25°C, unless otherwise noted)
Leakage
detection
circuit
2ms
circuit
1ms
circuit
IS0
IS1
IS2
IS3
IS0'
IS1'
IS3'
–
VS max
Vion
IIH
VO
VILKI
VRCL
EIOH
VTH
ETW1
–
EIOH
VTH
ETW2
–
VT
Parameter
Power supply circuit
Symbol
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
VT variation with ambient temperature
VBLT
–
–
IIBLT
VIBLC
EIOH
VTH
ETW4
EIOH
VTH
ETW3
VOL8
IOHc
IOHn
IOHh
Vsoff
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
SCR drive
circuit
Reset
circuit
Abnormal voltage
detecting circuit
–
SCRT pin “H” output current
IOH holding supply voltage
VS
Test conditions
9V PSAV = VCC
9V PSAV = GND
9V Ta = -20 to 85°C
– IS = 4mA
ILKI -VREF
VIN = VREF
9V
IILKI = ±3mA
IRCL = 5mA
VO = 0V : IOH = -10.4µA
9V
C = 0.01µF : TW1 = 2.3ms
Ta = -20 to 85°C
VO = 0V : IOH = -10.4µA
9V
C = 0.0047µF : TW2 = 1.1ms
Ta = -20 to 85°C
9V 60Hz
Ta = 25 → 85°C
9V
Ta = 25 → -20°C
9V
–
Ta = -20 to 85°C
9V VIN = VREF
IIN = 1mA
VO = 0V : IOH = -8µA
9V
C = 1.0µF : TW4 = 300ms
VO = 0V : IOH = -10µA
9V C = 0.33µF : TW3 = 55ms
9V IOL = 200µA
Ta = -20°C
9V VO = 0.8V Ta = 25°C
Ta = 85°C
–
Min.
570
570
570
520
520
520
520
–
–
–
–
–
–
–
-20
–
-15
–
-20
–
-15
–
–
–
–
2.2
–
–
–
–
-20
–
-30
-20
–
-30
–
-200
-100
-70
–
Limits
Typ.
820
840
810
740
740
760
740
-0.07
13.9
±7.5
2
2.7
±1.2
4.6
–
2.4
–
-0.06
–
2.4
–
-0.06
6.5
-4.0
-4.0
2.4
0.01
0.06
120
7.2
–
2.4
–
–
2.4
–
0.1
-260
-220
-180
3.0
Unit
Max.
950
µA
950
µA
950
µA
870
µA
870
µA
870
µA
870
µA
–
%/°C
15
V
–
mVdc
15
nA
–
V
–
V
–
V
20
%
–
V
15
%
–
%/°C
20
%
–
V
15
%
–
%/°C
–
mVrms
–
%
–
%
2.6
V
–
%/V
–
%/°C
300
nA
–
V
20
%
–
V
30
%
20
%
–
V
30
%
0.2
V
µA
–
–
µA
–
µA
4.5
V
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
EARTH LEAKAGE DETECTION
ILKI input
2.4V
TRC1 pin
2.3ms
2.4V
TRC2 pin
2.4V
OFFC pin
0.7V
55ms
SCR output
✽When PSEL = GND
55ms
SCR output
✽When PSEL = VCC
ABNORMAL VOLTAGE DETECTION
2.4V
IBLI input
2.4V
OFFC pin
2.4V
TTDC pin
300ms
55ms
SCR output
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
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 CHARACTERISTICS figure 1 on page 9. Attention should be given to
the circuit current when designing the power supply circuit.
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 VF may 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, R2 and VZ be set as shown below.
RS
VS
R1
IC
Commercial
power supply
IBLI pin
Input
VZ
R2
VZ
• R1 + R2 > 200kΩ
(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=100kΩ between VREF pin and GND.
It should be noted that the circuit current will increase at
I = 2.7V/R (approx.).
•
R1 x R2
< 7k Ω
R1 + R2
(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).
• VZ = 4.0V
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
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.
H - VL)
T = C x (V
= 0.33µF x (2.4 - 0.7) = 55ms
I
10µA
3.1V
2.4V
OFFC pin waveform
0.7V
• ln the case of leakage detection :
May become 10ms (50Hz) shorter
• ln the case of abnormal voltage detection :
May become 20ms (50Hz) shorter
55ms
SCRT pin waveform
0V
Note. t : time shorter than setting value
t = 10 – 20ms
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 openphase protection function disappears. Pin No. in parentheses
are of L type.
VCC
PSAV
IBLI
TTDC
TRC1
(Example 1)
VCC
PSAV
IBLI
TRC2
TTDC
TRC1
(Example 2)
TRC2
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
TYPICAL CHARACTERISTICS
Source Current vs. Supply Voltage
Source Current vs. Supply Voltage
4
1000
When standing by
Ta = 25°C
85°C
900
25°C
Source current (µA)
Source current (mA)
3
2
-20°C
1
When detecting leakage
800
When standing by
When SCR ON
700
600
0
0
5
10
6
15
8
Supply voltage (V)
Source Current vs. Ambient Temperature
1000
1000
VS = 9V
When detecting leakage
VS = 9V
When standing by
900
Source current (µA)
900
Source current (µA)
12
Supply voltage (V)
Source Current vs. Ambient Temperature
800
700
600
-50
0
50
800
700
600
-50
100
Ambient temperature (°C)
0
50
100
Ambient temperature (°C)
Source Current vs. Ambient Temperature
Source Current vs. Ambient Temperature
1000
1000
VS = 9V
When SCR ON
VS = 9V
When detecting abnormal voltage
900
Source current (µA)
900
Source current (µA)
10
800
700
600
-50
0
50
Ambient temperature (°C)
100
800
700
600
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
IREF Output Voltage vs. Ambient Temperature
IREF Output Voltage vs. Supply Voltage
1.5
1.5
VS = 9V
1.4
IREF output voltage (V)
IREF output voltage (V)
Ta = 25°C
1.3
1.2
8
10
1.3
1.2
1.1
-50
1.1
6
1.4
12
Supply voltage (V)
100
VREF Output Voltage vs. Ambient Temperature
2.9
2.9
Ta = 25°C
VS = 9V
2.8
VREF output voltage (V)
VREF output voltage (V)
50
Ambient temperature (°C)
VREF Output Voltage vs. Supply Voltage
2.7
2.6
2.5
8
6
10
2.8
2.7
2.6
2.5
-50
12
Supply voltage (V)
0
50
100
Ambient temperature (°C)
VCC Output Voltage vs. Supply Voltage
VCC Output Voltage vs. Ambient Temperature
6.0
6.0
Ta = 25°C
VS = 9V
5.5
VCC output voltage (V)
VCC output voltage (V)
0
5.0
4.5
4.0
6
8
10
Supply voltage (V)
12
5.5
5.0
4.5
4.0
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
TRC1,2 “H” Output Current vs. Supply Voltage
TRC1,2 “H” Output Current vs. Ambient Temperature
12
12
VS = 9V
TRC1,2 “H” output current (µA)
IRC1,2 “H” output current (µA)
Ta = 25°C
11
10
9
8
10
10
9
8
-50
8
6
11
12
100
Ambient temperature (°C)
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage
vs. Supply Voltage
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage
vs. Ambient Temperature
3.0
VS = 9V
Threshold voltage (V)
Ta = 25°C
Threshold voltage (V)
50
Supply voltage (V)
3.0
2.5
6
8
10
2.5
2.0
-50
2.0
12
50
100
Ambient temperature (°C)
TRC1 Pulse Width vs. Supply Voltage
TRC1 Pulse Width vs. Ambient Temperature
VS = 9V
TRC1 = 0.01µF
TRC1 pulse width (ms)
3
2
6
0
Supply voltage (V)
Ta = 25°C
TRC1 = 0.01µF
TRC1 pulse width (ms)
0
8
10
Supply voltage (V)
12
3
2
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
Total Leakage Detection AC Voltage
vs. Ambient Temperature
8
Ta = 25°C
TRC1 = 0.01µF
fin = 60Hz
7
6
5
4
8
6
10
12
Total leakage detection AC voltage (mVrms)
Total leakage detection AC voltage (mVrms)
Total Leakage Detection AC
Voltage vs. Supply Voltage
8
VS = 9V
TRC1 = 0.01µF
fin = 60Hz
7
6
5
4
-50
100
Ambient temperature (°C)
TTDC “H” Output Current vs. Supply Voltage
TTDC “H” Output Current vs. Ambient Temperature
10
Ta = 25°C
VS = 9V
TTDC “H” output current (µA)
TTDC “H” output current (µA)
50
Supply voltage (V)
10
9
8
7
6
8
10
9
8
7
6
-50
6
12
0
50
100
Supply voltage (V)
Ambient temperature (°C)
TTDC Pulse Width vs. Supply Voltage
TTDC Pulse Width vs. Ambient Temperature
350
350
Ta = 25°C
TTDC = 1.0µF
VS = 9V
TTDC = 1.0µF
TTDC pulse width (ms)
TTDC pulse width (ms)
0
300
250
6
8
10
Supply voltage (V)
12
300
250
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
OFFC “H” Output Current vs. Supply Voltage
OFFC “H” Output Current vs. Ambient Temperature
12
12
VS = 9V
OFFC “H” output current (µA)
OFFC “H” output current (µA)
Ta = 25°C
11
10
9
8
6
8
10
11
10
9
8
-50
12
Supply voltage (V)
1.2
VS = 9V
OFFC “L” output voltage (V)
OFFC “L” output voltage (V)
Ta = 25°C
1.0
0.8
0.6
6
8
10
1.0
0.8
0.6
0.4
-50
12
Supply voltage (V)
0
50
100
Ambient temperature (°C)
OFFC Pulse Width vs. Supply Voltage
OFFC Pulse Width vs. Ambient Temperature
80
80
Ta = 25°C
OFFC = 0.33µF
VS = 9V
OFFC = 0.33µF
70
OFFC pulse width (ms)
OFFC pulse width (ms)
100
OFFC “L” Output Voltage vs. Ambient Temperature
1.2
60
50
40
50
Ambient temperature (°C)
OFFC “L” Output Voltage vs. Supply Voltage
0.4
0
6
8
10
Supply voltage (V)
12
70
60
50
40
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
SCRT “L” Output Voltage vs. “L” Output Current
0.4
SCRT “L” output voltage (V)
VS = 9V
Ta = 25°C
0.3
0.2
0.1
0
0
400
200
600
800
1000
1200
“L” output current (µA)
SCRT “L” Output Voltage vs. “L” Supply Voltage
SCRT “L” Output Voltage vs. Ambient Temperature
0.4
0.4
VS = 9V
IOL = 200µA
SCRT “L” output voltage (V)
SCRT “L” output voltage (V)
Ta = 25°C
IOL = 200µA
0.3
0.2
0.1
0
6
8
10
0.3
0.2
0.1
0
-50
12
50
100
Supply voltage (V)
Ambient temperature (°C)
SCRT “H” Output Current vs. Supply Voltage
SCRT “H” Output Current vs. Ambient Temperature
400
400
VS = 9V
SCRT “H” output current (µA)
Ta = 25°C
SCRT “H” output current (µA)
0
300
200
100
0
0
2
4
6
8
Supply voltage (V)
10
12
300
200
100
0
-50
0
50
Ambient temperature (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
APPLICATION EXAMPLE
T. Coil
SCR
AC-LINE
VS
IBLI
VCC
TTDC
OFFC
SCRT
PSAV
Abnormal voltage
detection
Power supply circuit
SCR driving
M54128L/FP
Earth leakage detection
PSEL
GND
IREF
VREF
ILKI
TRC1
TRC2
Note
Z
C
T
✽An implementation example, which should be fully examined.
Note : MZ Core Series by Soryo Denshi Kagaku Co., Ltd (Mitsubishi Subsidiary)
Tel. +81-427-74-7813