MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
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.
PIN CONFIGURATION (TOP VIEW)
GND 1
14 V
S
13 V
CC
FEATURES
q
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.
q
lt is a possible that cope with lEC owing to mode change.
• Adopt the 1.5 times counting system.
q
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.
q
High input sensitivity : V
T
= 6.5mVrms
q
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.
q
Low voltage operation : 7 to12V (conventional Mitsubishi
lCs : 12 to 20V)
q
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)
q
Highly stable design : Employment of circuits of which
characteristics fluctuations resulting from changes in supply
voltage/ambient temperature are small.
I
REF
2
M54128FP
V
REF
3
I
LKI
4
T
RC1
5
T
RC2
6
P
SEL
7
12 P
SAV
11 I
BLI
10 T
TDC
9 OFF
C
8 S
CRT
Outline 14P2N-A
S
CRT
1
OFF
C
2
T
TDC
3
I
BLI
4
P
SAV
5
V
CC
6
M54128L
V
S
7
GND 8
I
REF
9
V
REF
10
I
LKI
11
APPLICATION
Earth leakage breaker
T
RC1
12
T
RC2
13
RECOMMENDED OPERATING CONDITIONS
Supply voltage range
• • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • •
7 to12V
Operating ambient temperature
• • • • • • • • • • • • • • • • • • • • • • • •
-20 to +85°C
P
SEL
14
Outline 14P5A
BLOCK DIAGRAM
V
S
V
CC
P
SAV
I
BLI
T
TDC
OFF
C
S
CRT
Abnormal voltage
detection
SCR-driver
Power supply circuit
Leakage detection
GND
I
REF
V
REF
I
LKI
T
RC1
T
RC2
P
SEL
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
PIN FUNCTION DESCRIPTION
Pin No.
L
FP
Common
7
6
9
8
5
14
13
2
1
12
Pin name
Function
V
S
V
CC
I
REF
GND
P
SAV
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 V
CC
pin. When the abnormal voltage detection function is not in use,
ground the pin. Circuit current can be reduced. Ground I
BLI
pin and T
TDC
pin also.
Leakage detection, abnormal voltage detection, SCR drive circuits
10
3
V
REF
Input reference level pin of the leakage detection circuit. Approx. 2.7V.
11
4
Another input pin of the leakage detection circuit.
I
LKI
12
5
Connects to capacitor for integrating output signals of the leakage input signal level discriminator.
T
RC1
13
6
Connects to condeser for removing noise.
T
RC2
Logic function switching pin used when detecting leakage.
When the pin is grounded, S
CRT
operates with the logic flow of negative input
→
positive input
→
14
7
P
SEL
negative input.
W
hen it is connected to V
CC
pin, S
CRT
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.
2
9
OFF
C
4
3
1
11
10
8
I
BLI
T
TDC
S
CRT
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
I/O EQUIVALENT CIRCUIT
V
CC
V
S
200
2.7V
V
REF
11-stages
BAND GAP
1.3V
I
LKI
150
500
350
6-stages
I
REF
External R (130k)
V
CC
10µA
10µA
8
µA
2.5V
100
100
T
RC1
T
RC2
OFF
C
T
TDC
V
CC
800
2.5V
2k
I
BLI
200k
3k
7-stages
S
CRT
50k
2k
2k
P
SAV
P
SEL
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
ABSOLUTE MAXIMUM RATINGS
(Ta = 25°C, unless otherwise noted)
Symbol
I
S
V
S MAX
∆V
IL
I
IL
I
IG
V
IBL
I
IBL
P
d
T
opr
T
stg
Parameter
Source current
Max. supply voltage
Input voltage
Input current
Input current
Input voltage
Input current
Power dissipation
Operating temperature
Storage temperature
Conditions
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
I
LKI
- V
REF
I
LKI
- V
REF
V
REF
- GND
I
BLI
- GND
I
BLI
- GND
TYPICAL CHARACTERISTICS
Thermal derating
250
Power dissipation P
d
(mW)
200
150
100
50
0
0
25
50
75
100
125
150
Ambient temperature T
a
(°C)
MITSUBISHI <CONTROL / DRIVER IC>
M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, unless otherwise noted)
Symbol
I
S0
I
S1
I
S2
I
S3
I
S0
'
I
S1
'
I
S3
'
–
V
S max
V
ion
I
IH
V
O
V
ILKI
V
RCL
E
IOH
V
TH
ET
W1
–
E
IOH
V
TH
ET
W2
–
V
T
–
V
BLT
–
–
I
IBLT
V
IBLC
E
IOH
V
TH
ET
W4
E
IOH
V
TH
ET
W3
V
OL8
I
OHc
I
OHn
I
OHh
V
soff
Power supply circuit
Parameter
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
I
SO
variation with ambient temperature
Maximum current voltage
Leakage detecting DC input voltage
ILKI pin input bias current
V
REF
pin output voltage
ILKI-V
REF
input clamp voltage
V
REF
-GND clamp voltage
TRC1 pin “H” output current precision
TRC1 threshold voltage
T
W1
pulse width precision
T
W1
variation with ambient temperature
TRC2 pin “H” output current precision
TRC2 threshold voltage
T
W2
pulse width precision
T
W2
variation with ambient temperature
Total leakage detecting AC voltage
V
T
variation with ambient temperature
Abnormal voltage detecting voltage
V
BLT
variation with supply voltage
V
BLT
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
I
OH
holding supply voltage
Abnormal voltage
detecting circuit
V
S
Test conditions
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
9V P
SAV
= V
CC
9V P
SAV
= GND
9V Ta = -20 to 85°C
– I
S
= 4mA
I
LKI -
V
REF
V
IN
= V
REF
9V
I
ILKI
=
±3mA
I
RCL
= 5mA
V
O
= 0V : I
OH
= -10.4µA
9V
C = 0.01µF : T
W1
= 2.3ms
Ta = -20 to 85°C
V
O
= 0V : I
OH
= -10.4µA
1ms
circuit
2ms
circuit
Leakage
detection
circuit
9V
C = 0.0047µF : T
W2
= 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 V
IN
= V
REF
I
IN
= 1mA
V
O
= 0V : I
OH
= -8µA
C = 1.0µF : T
W4
= 300ms
V
O
= 0V : I
OH
= -10µA
Reset
circuit
9V
9V C = 0.33µF : T
W3
= 55ms
9V I
OL
= 200µA
Ta = -20°C
9V V
O
= 0.8V Ta = 25°C
Ta = 85°C
–
SCR drive
circuit
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