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 µA standard (VS = 9 V, Ta = 25°C) SCR on: 740 µA standard (VS = 9 V, Ta = 25°C) • 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 to85°C Rev.1.0, Sep.16.2003, page 1 of 21 M54128L/FP Block Diagram VS VCC PSAV IBLI TTDC Abnormal voltage detection OFFC SCRT SCR-driver Power supply circuit Leakage detection GND IREF Rev.1.0, Sep.16.2003, page 2 of 21 VREF ILKI TRC1 TRC2 PSEL M54128L/FP Pin Configuration (TOP VIEW) GND 1 14 VS IREF 2 13 VCC ILKI 4 TRC1 5 M54128FP VREF 3 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 VS 7 GND 8 M54128L VCC 6 IREF 9 VREF 10 ILKI 11 TRC1 12 TRC2 13 PSEL 14 Outline 14P5A Rev.1.0, Sep.16.2003, page 3 of 21 M54128L/FP Pin Functions Pin no. L Pin name Function FP Common 7 14 Vs Power supply 6 13 Vcc Output pin for internal constant-voltage circuit; connect to a decoupling capacitor 9 8 5 2 1 12 IREF GND PSAV 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 3 4 5 VREF ILKI TRC1 13 14 6 7 TRC2 PSEL 2 9 OFFc 4 3 1 11 10 8 IBLI TTDC SCRT 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 Æ positive input Æ negative input •When connected to VCC pin [13]: negative input Æ positive input SCRT operates with the above logic. •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 Rev.1.0, Sep.16.2003, page 4 of 21 M54128L/FP Input / Output Equivalent Circuits 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 Rev.1.0, Sep.16.2003, page 5 of 21 2k PSEL M54128L/FP Absolute Maximum Ratings (unless otherwise noted, Ta = 25°C) Symbol Quantity Conditions Rated value Unit Is Power supply current 4 mA VsMAX ∆VIL IIL IIG VIBL IIBL Pd Topr Tstg Maximum power supply voltage Input voltage Input current Input current Input voltage Input current Power consumption Operating temperature range Storage temperature 15 –1.4 to +1.4 –5 to +5 10 –0.3 to +4.0 4 200 –20 to 85 –55 to 125 V V mA mA V mA mW °C °C across ILKI and VREF across ILKI and VREF VREF–GND across IBLI and GND across IBLI and GND Characteristic Curve Thermal derating Power dissipation Pd (mW) 250 200 150 100 50 0 0 25 50 75 100 125 Ambient temperature Ta (°C) Rev.1.0, Sep.16.2003, page 6 of 21 150 M54128L/FP Electrical Characteristics (unless otherwise noted, Ta = 25°C) Symbol Quantity Vs Measurement conditions Ratings Min. Typ. Unit Max. 9V Psav = Vcc 570 820 950 µA Power supply circuit Is0 Power supply current, during standby Is1 Power supply current, during leakage detection 570 840 950 µA Is2 Power supply current, during abnormal voltage detection 570 810 950 µA Is3 Power supply current, immediately after SCR driving Power supply current, during standby 520 740 870 µA Is0’ Is1’ Is3’ – Vs max 520 740 870 µA Power supply current, during leakage detection 520 760 870 µA Power supply current, immediately after SCR driving ISO ambient temperature dependence Voltage at maximum current 520 740 870 µA 9V Psav = GND 9V — Ta = –20 to 85°C Is = 4mA — — –0.07 13.9 — 15 % / °C V 9V vs. VREF VIN = VREF — — ±7.5 2 — 15 mVdc nA Leakage detection circuit 1 Vion IIH Leakage detection DC input voltage ILK1 pin input bias current Vo VREF pin output voltage — 2.7 — V VILKI ILKI-VREF input clamping voltage IILKI = ±3mA — ±1.2 — V VRCL VREF-GND clamping voltage IRCL = 5mA — 4.6 — V o = 0V : IOH = –10.4µA –20 — 20 % — 2.4 — V C = 0.01µF : Tw1 = 2.3ms Ta = –20 to 85°C –15 — 15 % — –0.06 — %/°C Vo = 0V : IOH = – 10µA –20 – — % – 2.4 — V C = 0.0047µF : TW2 = 1.1ms 15 — 15 % 2 ms circuit ElOH TRC1 pin "H" output current precision VTH ETw1 TRC1 pin threshold voltage TW1 pulse width precision – TW1 ambient temperature dependence 9V 1 ms circuit 9V EloH TRC2 pin "H" output current precision VTH ETw2 TRC2 pin threshold voltage TW2 pulse width precision – TW2 ambient temperature dependence Ta = –20 to 85°C — –0.06 20 %/°C VT Total leakage detection AC voltage 9V 60Hz — 6.5 — mVrms – VT ambient temperature dependence 9V Ta =25 →85°C — –4.0 — % Ta = 25 → –20°C — –4.0 — % Rev.1.0, Sep.16.2003, page 7 of 21 M54128L/FP Electrical Characteristics (cont.) (unless otherwise noted, Ta = 25°C) Symbol Quantity Vs Measurement conditions Ratings Min. Typ. Unit Max. 2.2 — 2.4 0.01 2.6 — V %/V Ta = –20 to 85°C — 0.06 — %/°C VIN = VREF IIN = 1mA Vo = 0V : IOH = –8µA 1.0µF: Tw4 = 300ms C = 0.33µF Tw4 = 300ms — — 120 7.2 300 — nA V –20 — 20 % Abnormal voltage detection circuit VBLT – Abnormal voltage detection voltage VBLT power supply voltage dependence 9V — – VBLT ambient temperature dependence 9V IIBLT VlBLC VTH IBLI pin input bias current IBLI-GND clamping voltage TTDC pin "H" output current precision ElOH ETw4 TTDC threshold voltage Delay time pulse width precision 9V — 2.4 — V –30 — 30 % –20 — 20 % — 2.4 — V C = 0.33 µF : TW3 =55 ms –30 — 30 % IOL = 200 µA Ta = –20°C Ta = 25°C — –200 –100 0.1 –260 –220 0.2 — — V µA µA –70 — –180 3.0 — 4.5 µA V Reset circuit ElOH OFFC pin "H" output current precision VTH ETw3 OFFC threshold voltage Reset timer pulse width precision 9V 9V Vo = 0V : IOH = –10µA SCR driver VoL8 lOHc lOHn lOHh VSOff SCRT pin "L" output voltage SCRT pin "H" output current 9V 9V Vo = 0.8V Ta = 85°C IOH hold power supply voltage Rev.1.0, Sep.16.2003, page 8 of 21 — M54128L/FP 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 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 kΩ) 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 kΩ 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 kΩ 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 IBLI pin Input R2 VZ • R1 + R2 > 200kΩ • R1 x R2 < 7k Ω 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). VZ≈4.0 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 µA; 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. 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 55ms SCRT pin waveform • ln the case of leakage detection : May become 10ms (50Hz) shorter • ln the case of abnormal voltage detection : May become 20ms (50Hz) shorter 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 (Example 1) Rev.1.0, Sep.16.2003, page 12 of 21 VCC PSAV IBLI TRC2 TTDC TRC1 (Example 2) TRC2 M54128L/FP Characteristic Curves 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) Rev.1.0, Sep.16.2003, page 13 of 21 100 800 700 600 -50 0 50 Ambient temperature (°C) 100 M54128L/FP 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) VREF Output Voltage vs. Supply Voltage 100 VREF Output Voltage vs. Ambient Temperature 2.9 Ta = 25°C VS = 9V 2.8 VREF output voltage (V) VREF output voltage (V) 50 Ambient temperature (°C) 2.9 2.7 2.6 2.5 8 6 10 2.8 2.7 2.6 2.5 -50 12 0 50 100 Supply voltage (V) 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) Rev.1.0, Sep.16.2003, page 14 of 21 12 5.5 5.0 4.5 4.0 -50 0 50 Ambient temperature (°C) 100 M54128L/FP 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) Rev.1.0, Sep.16.2003, page 15 of 21 12 3 2 -50 0 50 Ambient temperature (°C) 100 M54128L/FP 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) Rev.1.0, Sep.16.2003, page 16 of 21 12 300 250 -50 0 50 Ambient temperature (°C) 100 M54128L/FP 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) Rev.1.0, Sep.16.2003, page 17 of 21 12 70 60 50 40 -50 0 50 Ambient temperature (°C) 100 M54128L/FP 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) Rev.1.0, Sep.16.2003, page 18 of 21 10 12 300 200 100 0 -50 0 50 Ambient temperature (°C) 100 M54128L/FP Application Circuit 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. Rev.1.0, Sep.16.2003, page 19 of 21 HE Rev.1.0, Sep.16.2003, page 20 of 21 G Z1 E EIAJ Package Code SOP14-P-300-1.27 1 14 z e Detail G D JEDEC Code − y b 7 8 Weight(g) 0.2 x M F A Detail F A2 Lead Material Cu Alloy L1 MMP c A1 A A1 A2 b c D E e HE L L1 z Z1 x y Symbol e1 b2 e1 I2 b2 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 − − Recommended Mount Pad e Plastic 14pin 300mil SOP I2 14P2N-A M54128L/FP Package Dimensions L Rev.1.0, Sep.16.2003, page 21 of 21 1 e D JEDEC Code − SEATING PLANE EIAJ Package Code ZIP14-P-325-1.27 b Weight(g) 0.74 14 Lead Material Cu Alloy A1 A2 A 14P5A e1 E A A1 A2 b c D E e e1 L Symbol c 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 Plastic 14pin 325mil ZIP M54128L/FP Sales Strategic Planning Div. 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