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M54128L/FP
EARTH LEAKAGE CURRENT DETECTOR
REJ03F0027-0100Z Rev.1.0 Sep.16.2003
Description
The M54128L/FP is a semiconductor integrated circuit having leakage detection and abnormal voltage detection functions for high-speed earth leakage interruption, and was developed for use in earth leakage breakers.
Features
* Lightning surge protection Two-count method adopted Improved dead-time performance for lightning impulses * IEC support: 1.5 count method switching * High input impedance Filter circuit can be configured using external capacitor, resistor Improved high-frequency, high harmonic superposition performance * High input sensitivity: VT=6.5 Vrms * Abnormal voltage detection (N open) function Neutral line open-phase protection in single-phase three-wire designs Function halt control (circuit current reduction) * Low-voltage operation 7 to 12 V (versus 12 to 20 V in previous series) Standby: 820 A standard (VS = 9 V, Ta = 25C) SCR on: 740 A standard (VS = 9 V, Ta = 25C) * Highly stable design Circuit designed for minimum characteristic fluctuation with changes in power supply voltage, ambient temperature
Applications
* Earth leakage breaker
Recommended Operating Conditions
* Power supply operating conditions: 7 to 12V * operating temperature: -20 to85C
Rev.1.0, Sep.16.2003, page 1 of 21
M54128L/FP
Block Diagram
VS VCC PSAV IBLI TTDC OFFC SCRT
Abnormal voltage detection
SCR-driver
Power supply circuit
Leakage detection
GND
IREF
VREF
ILKI
TRC1
TRC2
PSEL
Rev.1.0, Sep.16.2003, page 2 of 21
M54128L/FP
Pin Configuration (TOP VIEW)
GND 1 IREF 2 14 VS 13 VCC
M54128FP
VREF 3 ILKI 4 TRC1 5 TRC2 6 PSEL 7
12 PSAV 11 IBLI 10 TTDC 9 OFFC 8 SCRT
Outline 14P2N-A
SCRT 1 OFFC 2 TTDC 3 IBLI 4 PSAV 5 VCC 6 VS 7 GND 8 IREF 9 VREF 10 ILKI 11 TRC1 12 TRC2 13 PSEL 14
Outline 14P5A
M54128L
Rev.1.0, Sep.16.2003, page 3 of 21
M54128L/FP
Pin Functions
Pin no. L FP Pin name Function
Common
7 6 9 8 5 14 13 2 1 12 Vs Vcc IREF GND PSAV Power supply Output pin for internal constant-voltage circuit; connect to a decoupling capacitor Connect a resistor to set the constant current of the internal circuits; approx. 1.3 V Ground During normal use, connected to VCC pin [13]. When not using the abnormal voltage detection function, should be grounded, so that circuit currents can be reduced. Pin IBLI [11] and pin TTDC [10] should also be grounded.
Leakage detection, abnormal voltage detection, SCR driving circuits
10 11 12 13 14 3 4 5 6 7 VREF ILKI TRC1 TRC2 PSEL Input standard level pin for leakage detection circuit; approx. 2.7 V Another input pin for leakage detection circuit Pin for connection to a capacitor to integrate the level discriminator output signal of the leakage input signal Pin to connect a capacitor for noise elimination Logic function switching pin for leakage detection *When grounded:negative input positive input negative input *When connected to VCC pin [13]: negative input positive input SCRT operates with the above logic.
2
9
OFFc
*When leakage input signal is not continued *When abnormal voltage input signal is not continued *When a leakage or abnormal voltage is detected and SCR is turned on
After a prescribed amount of time, this IC is returned to the initial state. A capacitor to set the time for this function is connected. Abnormal voltage detection circuit input pin Pin to connect a capacitor to set the time for the abnormal voltage detection circuit Thyristor driving output pin
4 3 1
11 10 8
IBLI TTDC SCRT
Rev.1.0, Sep.16.2003, page 4 of 21
M54128L/FP
Input / Output Equivalent Circuits
VCC VS 200
2.7V VREF 11-stages BAND GAP 1.3V ILKI 150
500
350 6-stages
IREF
External R (130k)
VCC 10A 10A 8 A
2.5V
100 100
TRC1 TRC2
OFFC
TTDC
VCC 800
2.5V 2k IBLI
200k
3k 7-stages SCRT 50k 2k 2k
PSAV
PSEL
Rev.1.0, Sep.16.2003, page 5 of 21
M54128L/FP
Absolute Maximum Ratings
(unless otherwise noted, Ta = 25C)
Symbol Is VsMAX VIL IIL IIG VIBL IIBL Pd Topr Tstg Quantity Power supply current Maximum power supply voltage Input voltage Input current Input current Input voltage Input current Power consumption Operating temperature range Storage temperature across ILKI and VREF across ILKI and VREF VREF-GND across IBLI and GND across IBLI and GND Conditions Rated value 4 15 -1.4 to +1.4 -5 to +5 10 -0.3 to +4.0 4 200 -20 to 85 -55 to 125 Unit mA V V mA mA V mA mW C C
Characteristic Curve
Thermal derating
250
Power dissipation Pd (mW)
200
150
100
50
0 0
25
50
75
100
125
150
Ambient temperature Ta (C)
Rev.1.0, Sep.16.2003, page 6 of 21
M54128L/FP
Electrical Characteristics
(unless otherwise noted, Ta = 25C)
Symbol Quantity Vs Measurement conditions Ratings Min. Typ. Unit Max.
Power supply circuit
Is0 Is1 Is2 Is3 Is0' Is1' Is3' - Vs max Power supply current, during standby Power supply current, during leakage detection Power supply current, during abnormal voltage detection Power supply current, immediately after SCR driving Power supply current, during standby Power supply current, during leakage detection Power supply current, immediately after SCR driving ISO ambient temperature dependence Voltage at maximum current 9V Psav = Vcc 570 570 570 520 9V Psav = GND 520 520 520 9V -- Ta = -20 to 85C Is = 4mA -- -- 820 840 810 740 740 760 740 -0.07 13.9 950 950 950 870 870 870 870 -- 15 A A A A A A A % / C V
Leakage detection circuit 1
Vion IIH Vo VILKI VRCL Leakage detection DC input voltage ILK1 pin input bias current VREF pin output voltage ILKI-VREF input clamping voltage VREF-GND clamping voltage IILKI = 3mA IRCL = 5mA 9V vs. VREF VIN = VREF -- -- -- -- -- 7.5 2 2.7 1.2 4.6 -- 15 -- -- -- mVdc nA V V V
2 ms circuit
ElOH VTH ETw1 - TRC1 pin "H" output current precision TRC1 pin threshold voltage TW1 pulse width precision TW1 ambient temperature dependence 9V o = 0V : IOH = -10.4A C = 0.01F : Tw1 = 2.3ms Ta = -20 to 85C -20 -- -15 -- -- 2.4 -- -0.06 20 -- 15 -- % V % %/C
1 ms circuit
EloH VTH ETw2 - VT - TRC2 pin "H" output current precision TRC2 pin threshold voltage TW2 pulse width precision TW2 ambient temperature dependence Total leakage detection AC voltage VT ambient temperature dependence 9V 9V 9V Vo = 0V : IOH = - 10A C = 0.0047F : TW2 = 1.1ms Ta = -20 to 85C 60Hz Ta =25 85C Ta = 25 -20C -20 - 15 -- -- -- -- - 2.4 -- -0.06 6.5 -4.0 -4.0 -- -- 15 20 -- -- -- % V % %/C mVrms % %
Rev.1.0, Sep.16.2003, page 7 of 21
M54128L/FP
Electrical Characteristics (cont.)
(unless otherwise noted, Ta = 25C)
Symbol Quantity Vs Measurement conditions Ratings Min. Typ. Unit Max.
Abnormal voltage detection circuit
VBLT - - IIBLT VlBLC VTH ElOH ETw4 Abnormal voltage detection voltage VBLT power supply voltage dependence VBLT ambient temperature dependence IBLI pin input bias current IBLI-GND clamping voltage TTDC pin "H" output current precision TTDC threshold voltage Delay time pulse width precision 9V -- 9V Ta = -20 to 85C VIN = VREF IIN = 1mA Vo = 0V : IOH = -8A 1.0F: Tw4 = 300ms C = 0.33F Tw4 = 300ms 2.2 -- -- -- -- -20 -- -30 2.4 0.01 0.06 120 7.2 -- 2.4 -- 2.6 -- -- 300 -- 20 -- 30 V %/V %/C nA V % V %
9V
Reset circuit
ElOH VTH ETw3 OFFC pin "H" output current precision OFFC threshold voltage Reset timer pulse width precision 9V Vo = 0V : IOH = -10A C = 0.33 F : TW3 =55 ms -20 -- 9V -30 -- 2.4 -- 20 -- 30 % V %
SCR driver
VoL8 lOHc lOHn lOHh VSOff SCRT pin "L" output voltage SCRT pin "H" output current 9V 9V Vo = 0.8V IOL = 200 A Ta = -20C Ta = 25C Ta = 85C IOH hold power supply voltage -- -- -200 -100 -70 -- 0.1 -260 -220 -180 3.0 0.2 -- -- -- 4.5 V A A A V
Rev.1.0, Sep.16.2003, page 8 of 21
M54128L/FP
Earth Leakage Detection
ILKI input
2.4V TRC1 pin
2.3ms
TRC2 pin
2.4V
2.4V OFFC pin 0.7V 55ms SCR output 55ms SCR output
*When PSEL = GND
*When PSEL = VCC
Abnormal Voltage Detection
2.4V IBLI input
2.4V OFFC pin
2.4V TTDC pin
300ms 55ms SCR output
Rev.1.0, Sep.16.2003, page 9 of 21
M54128L/FP
Precaution for Use
Important information on use of the M54128L/FP is given below. Examples of improvements are no more than single examples; improvement should be given adequate study. 1. Regarding the VS applied voltage (1) The Is circuit current (clamping circuit characteristics of equivalent circuit) is as shown by the characteristic diagram 1 on page 13. Sufficient care should be exercised when designing a power supply circuit. Commercial power supply
RS VS IC Commercial power supply VZ
(2) When rectifying a commercial power supply for use a) As Vz, a 12 V or lower Zener diode should always be used (the absolute maximum rating should not exceed 15 V). b) At high temperatures, the clamping voltage is reduced and IS increases, but this is limited by RS. (3) When using an ordinary DC power supply, VS should be from 7 to 12 V. 2. Regarding the IREF pin resistance (R = 130 k) This is the IC reference constant-current source. (Fluctuations in the power supply voltage and ambient temperature characteristics are suppressed.) This resistance determines the characteristics for various circuits, and so it is recommended that a high-precision resistance (2%) be used. 3. Regarding the printed circuit board layout Due to the effect of external noise (or noise simulator etc.), erroneous operation is conceivable. In order to improve noise resistance, the board layout should be such that wiring to external capacitors and resistors is as short as possible. Particular care should be taken in wiring to connect capacitors to the VS pin, the VCC pin, and the SCRT pin. 4. Care should be taken to ensure that the SCRT output pin does not fall to a voltage more negative than ground level. 5. Regarding changes in sensitivity due to insulation degradation When degradation of the insulation between the ZCT input pin and the high-voltage unit is imagined, by connecting a resistance R = 100 k or so between the VREF pin and ground, there may be improvement; this possibility should be studied carefully. However, the circuit current increases as I 2.7V/R, so caution should be exercised.
Rev.1.0, Sep.16.2003, page 10 of 21
M54128L/FP 6. Regarding the IBLI input pin clamping diode As indicated in the equivalent circuit, seven stages of a series resistance of approx. 2 k and a forward-direction diode are employed. (1) The drop in the diode VF at high temperatures may cause the input pin clamping voltage to drop, to approach the comparator reference potential (2.4 V), so that on the occurrence of a leakage current, the over voltage detection level may fluctuate somewhat. The detection circuit should be configured as shown below. Also, it is recommended that R1, R2 and VZ be set as indicated below.
R1 Input IBLI pin
R2
VZ
* R1 + R2 > 200k * R1 x R2 < 7k R1 + R2
(2) During excessive input, as indicated above, settings should ensure that the input pin voltage is 4.3 V or lower (to prevent saturation operation of the comparator circuit). VZ4.0 V 7. Regarding the reset time in the reset timer circuit This circuit is a timer circuit designed for VL = 0.7 V, VH = 2.5 V, and IO = 10 A; when SCR is turned on, the power supply to the leakage detection circuit and abnormal voltage detection circuit is interrupted, and VL may not fall to 0.7 V, as shown in the diagram below, so that the reset time is shortened. The reset time should be set to a longer time in advance.
- VL) T = C x (VH = 0.33F x (2.4 - 0.7) = 55ms I 10A
3.1V
2.4V OFFC pin waveform 0.7V 55ms
* ln the case of leakage detection : May become 10ms (50Hz) shorter * ln the case of abnormal voltage detection : May become 20ms (50Hz) shorter
SCRT pin waveform
0V Note. t : time shorter than setting value t = 10 - 20ms
*For leakage detection: times may be shorter by 10 ms (50 Hz) *For abnormal voltage detection: times may be shorter by 20 ms (50 Hz)
Note: t is the time shorter than the set time
Rev.1.0, Sep.16.2003, page 11 of 21
M54128L/FP 8. Application of the leakage detection function to a time delay function As shown below, by employing the N open function, the leakage detection function can be provided with a time delay function (several hundred ms). However, the N open function cannot be used.
VCC
PSAV
IBLI
TTDC TRC1 TRC2
VCC
PSAV
IBLI
TTDC TRC1 TRC2
(Example 1)
(Example 2)
Rev.1.0, Sep.16.2003, page 12 of 21
M54128L/FP
Characteristic Curves
Source Current vs. Supply Voltage
4 When standing by 85C 3 900 1000 Ta = 25C
Source Current vs. Supply Voltage
Source current (mA)
Source current (A)
25C
When detecting leakage
2 -20C
800
When standing by
When SCR ON 700
1
0 0 5 10 15
600 6 8 10 12
Supply voltage (V)
Supply voltage (V)
Source Current vs. Ambient Temperature
1000 VS = 9V When standing by 900
Source Current vs. Ambient Temperature
1000 VS = 9V When detecting leakage 900
Source current (A)
Source current (A)
800
800
700
700
600 -50
0
50
100
600 -50
0
50
100
Ambient temperature (C)
Ambient temperature (C)
Source Current vs. Ambient Temperature
1000 VS = 9V When detecting abnormal voltage 900
Source Current vs. Ambient Temperature
1000 VS = 9V When SCR ON 900
Source current (A)
800
Source current (A)
0 50 100
800
700
700
600 -50
600 -50
0
50
100
Ambient temperature (C)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 13 of 21
M54128L/FP
IREF Output Voltage vs. Supply Voltage
1.5 Ta = 25C
IREF Output Voltage vs. Ambient Temperature
1.5 VS = 9V
IREF output voltage (V)
IREF output voltage (V)
1.4
1.4
1.3
1.3
1.2
1.2
1.1 6 8 10 12
1.1 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
VREF Output Voltage vs. Supply Voltage
2.9 Ta = 25C
VREF Output Voltage vs. Ambient Temperature
2.9 VS = 9V
VREF output voltage (V)
2.7
VREF output voltage (V)
6 8 10 12
2.8
2.8
2.7
2.6
2.6
2.5
2.5 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
VCC Output Voltage vs. Supply Voltage
6.0 Ta = 25C
VCC Output Voltage vs. Ambient Temperature
6.0 VS = 9V
VCC output voltage (V)
5.0
VCC output voltage (V)
5.5
5.5
5.0
4.5
4.5
4.0 6 8 10 12
4.0 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 14 of 21
M54128L/FP
TRC1,2 "H" Output Current vs. Supply Voltage
12 Ta = 25C
TRC1,2 "H" Output Current vs. Ambient Temperature
12 VS = 9V
IRC1,2 "H" output current (A)
TRC1,2 "H" output current (A)
11
11
10
10
9
9
8 6 8 10 12
8 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage vs. Supply Voltage
3.0 Ta = 25C 3.0
TRC1,2/OFFC/IBLI/TTDC Threshold Voltage vs. Ambient Temperature
VS = 9V
Threshold voltage (V)
Threshold voltage (V)
2.5
2.5
2.0 6 8 10 12
2.0 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
TRC1 Pulse Width vs. Supply Voltage
Ta = 25C TRC1 = 0.01F
TRC1 Pulse Width vs. Ambient Temperature
VS = 9V TRC1 = 0.01F
TRC1 pulse width (ms)
TRC1 pulse width (ms)
3
3
2
2
6
8
10
12
-50
0
50
100
Supply voltage (V)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 15 of 21
M54128L/FP
Total Leakage Detection AC Voltage vs. Supply Voltage Total Leakage Detection AC Voltage vs. Ambient Temperature
Total leakage detection AC voltage (mVrms)
Total leakage detection AC voltage (mVrms)
8 Ta = 25C TRC1 = 0.01F fin = 60Hz 7
8 VS = 9V TRC1 = 0.01F fin = 60Hz 7
6
6
5
5
4 6 8 10 12
4 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
TTDC "H" Output Current vs. Supply Voltage
10 Ta = 25C
TTDC "H" Output Current vs. Ambient Temperature
10 VS = 9V
TTDC "H" output current (A)
TTDC "H" output current (A)
9
9
8
8
7
7
6 6 8 10 12
6 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
TTDC Pulse Width vs. Supply Voltage
350 Ta = 25C TTDC = 1.0F
TTDC Pulse Width vs. Ambient Temperature
350 VS = 9V TTDC = 1.0F
TTDC pulse width (ms)
300
TTDC pulse width (ms)
300
250 6 8 10 12
250 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 16 of 21
M54128L/FP
OFFC "H" Output Current vs. Supply Voltage
12 Ta = 25C
OFFC "H" Output Current vs. Ambient Temperature
12 VS = 9V
OFFC "H" output current (A)
11
OFFC "H" output current (A)
6 8 10 12
11
10
10
9
9
8
8 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
OFFC "L" Output Voltage vs. Supply Voltage
1.2 Ta = 25C
OFFC "L" Output Voltage vs. Ambient Temperature
1.2 VS = 9V
1.0
OFFC "L" output voltage (V)
6 8 10 12
OFFC "L" output voltage (V)
1.0
0.8
0.8
0.6
0.6
0.4
0.4 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
OFFC Pulse Width vs. Supply Voltage
80 Ta = 25C OFFC = 0.33F
OFFC Pulse Width vs. Ambient Temperature
80 VS = 9V OFFC = 0.33F
OFFC pulse width (ms)
60
OFFC pulse width (ms)
6 8 10 12
70
70
60
50
50
40
40 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 17 of 21
M54128L/FP
SCRT "L" Output Voltage vs. "L" Output Current
0.4 VS = 9V Ta = 25C
SCRT "L" output voltage (V)
0.3
0.2
0.1
0
0
200
400
600
800
1000
1200
"L" output current (A)
SCRT "L" Output Voltage vs. "L" Supply Voltage
0.4 Ta = 25C IOL = 200A
SCRT "L" Output Voltage vs. Ambient Temperature
0.4 VS = 9V IOL = 200A
SCRT "L" output voltage (V)
0.3
SCRT "L" output voltage (V)
0.3
0.2
0.2
0.1
0.1
0
6
8
10
12
0 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
SCRT "H" Output Current vs. Supply Voltage
400 Ta = 25C
SCRT "H" Output Current vs. Ambient Temperature
400 VS = 9V
SCRT "H" output current (A)
300
SCRT "H" output current (A)
0 2 4 6 8 10 12
300
200
200
100
100
0
0 -50
0
50
100
Supply voltage (V)
Ambient temperature (C)
Rev.1.0, Sep.16.2003, page 18 of 21
M54128L/FP
Application Circuit Example
T. Coil AC-LINE SCR
VS
VCC PSAV
IBLI
TTDC
OFFC
SCRT
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.
Rev.1.0, Sep.16.2003, page 19 of 21
14P2N-A
JEDEC Code - e b2 Weight(g) 0.2 Lead Material Cu Alloy
M54128L/FP
MMP
Plastic 14pin 300mil SOP
EIAJ Package Code SOP14-P-300-1.27
Package Dimensions
14
8
HE
E
L1
L
Rev.1.0, Sep.16.2003, page 20 of 21
e1
Recommended Mount Pad Symbol
1 7
F A
G
D
A2
b
A1
x
M
e y
z Detail G Detail F
c
A A1 A2 b c D E e HE L L1 z Z1 x y b2 e1 I2
Z1
Dimension in Millimeters Min Nom Max - - 2.1 0 0.1 0.2 - 1.8 - 0.35 0.4 0.5 0.18 0.2 0.25 10.0 10.1 10.2 5.2 5.3 5.4 - 1.27 - 7.5 7.8 8.1 0.4 0.6 0.8 - 1.25 - - 1.24 - - - 1.39 - - 0.25 - - 0.1 0 - 8 - 0 76 - - 7.62 - 1.27 - -
I2
M54128L/FP
14P5A
JEDEC Code - Weight(g) 0.74 Lead Material Cu Alloy
Plastic 14pin 325mil ZIP
EIAJ Package Code ZIP14-P-325-1.27
1
14
A1
A2 A
Rev.1.0, Sep.16.2003, page 21 of 21
D
E
c e1
SEATING PLANE
Symbol
e
b
A A1 A2 b c D E e e1 L
Dimension in Millimeters Min Nom Max - - 8.3 - - 0.9 - - 6.3 0.4 0.5 0.6 0.22 0.27 0.34 18.8 19.0 19.2 2.6 2.8 3.0 - - 1.27 - - 2.54 - - 2.8
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