M54125L

M54125L MITSUBISHI | Alldatasheet

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EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC> DES CRIPT IO N The M54125 is a semiconductor integrated circuit consisting of an amplifier for high-speed earth leakage circuit breaker. FEAT URES l Satisfies JIS C 8371 l Temperature-stable input current trigger threshold (VLKT = 9mV) l Capable of detecting a lost phase on the neutral line l Economical, low external component count l Highly resistant to noise and power surges l Wide operating temperature range (Ta = -20 – +80°C) APP LICAT IO N High-speed earth-leakage circuit breakers FUNCT IO N The M54125 is a semiconductor integrated circuit for use in the amplifier section of earth-leakage circuit breakers. It consists of a differential amplifier, one-shot circuit, output circuit, current regulator, waveform regulator and delay circuit. The following description refers to the block diagram, application example, and operational waveforms. PIN C O N FIG URAT IO N (TO P VIEW ) B LOC K D IAGR A M (Note: Pin No. in parentheses are of M54125L) Outline 14P5A Outline 10P2-C Input Bias voltage Capacitor Output ILK VB MM OUT GND VS RX IBL WF TD External resistor Input C apacitor CWF C apacitor CTD M54125P fi M54125L MM OUT GND NC TD NC NC VS ILK VB NC fi Capacitor Output Capacitor CTD Bias voltage Input WF IBL RX fi fi Capacitor CWF Input External resistor N.C: no connection VCC VS Voltage regulator VB A • VLKT VBLT RX IBL WF TD External resistor Input Capacitor CWF Capacitor CWF Bias current source Comparator ComparatorAmplifier ILK VB MM OUT GND Input Bias Capacitor Output Wave- form regulator Delay circuit Output circuit One-shot multi vibrator M5 4125L/P A 1 2 3 4 5 678910 (12) (9) (8) (7) (2) (3)(1)(14)(13) (5)

EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC> ABS O LUT E M AXIM UM RA TING S (Ta = -20 – 80°C unless otherwise noted) Supply voltage OUT applied voltage Supply surge current ILK input voltage IS Symbol Ratings UnitParameter Conditions IS(SO) VOUT 0 – 12 -0.3– 6 mA mA Pd Power dissipation Topr Operating temperature Tstg Storage temperature -0.3– 4 160 mW (Note 1) Pin VB serves as the voltage reference When external voltage is applied 0 – 6 -1.8– +1.8 -20– 80 -55– 125 V V Note 1: IS(SG) current waveform, which is given in the following diagram, shall be one shot or less per minute. V REC O M M ENDE D O PERA TIN G C O NDITIO N S (Ta = -20 – 80°C unless otherwise noted) Limits Min. Typ. Max.Symbol Unit VS Supply voltage 12 Supply current 5.6IS C MM External capacitor MM mA mF Average supply current frequency per cycle D VILK VIBL IBL input voltage V C WF C TD R X External capacitor WF External capacitor TD External resistor R X Average power supply current per cycle When output OUT is OFF 0.22 6.8 mF mF kW Parameter Handling of unused pins when the abnormal voltage detection function is not used

• Pin RX must be left open
• Pin TD must be shorted to GND
• Pin WF and pin IBL may be left open or shorted to GND IS(SG) 1mS 40mS 12mA 6mA 0mA

EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC> ABNO RM AL VO LTAG E D ETEC TIO N FUNCT IO N Normally VIBL, fixed amplitude AC supply that has been rectified and divided by a resistor, is input to abnormal voltage input IBL. When a fault occurs in the neutral line N, successive peaks of VIBL become alternately small and large, with the levels determined by the load on the AC power lines A and B. When the amplitude of VIBL exceeds the abnormal voltage trip voltage VBLT , capacitor C WF connected to pin WF discharges. After the discharge shase is completed, charging begins again.) When voltage VWF at WF drops below the WF threshold voltage, capacitor CTD at TD charges, and after delay time tTD , when voltage VTD at TD reaches the TD threshold voltage, output OU T turns on, activating the circuit breaker. To avoid misoperation due to the effect of repeated one-shot noise that brings VIBL above VBLT , the voltage drops to the initial value only after time tWF . This abnormal voltage detection circuit is enabled only when an external resistor R X is connected to pin R X to enable the current flow. LEAKAG E DE TECT IO N FUNCT IO N When leakage current current Ig appears on the primary side of zero-current transformer, ZCT, leakage signal voltage V ILK appears on the secondary side and is input at ILK with bias VB as the reference. In the half cycle when VILK is negative, capacitor C MM connected to MM charges until VILK reaches the DC trip voltage. If the voltage at MM does not reach the MM positive threshold voltage, when the charging phase is completed, capacitor CMM discharges at a small current. The output OUT is reset to the off state (in which output current flows in) when VMM descends to the MM negative threshold voltage. Earth-leakage currents are detected when the amplitude of input voltage VILK exceeds the DC trip voltage VLKT for longer than the detection time tMM . The output OUT turns on for time tOUT . The output current is used to turn on the thyristor that opens the breaker contacts. WAV EFO R M DIAG RAM 1) Voltage waveform when earth leakage is detected. MM positive direction threshold voltage Note: Values in the parentheses are for reference only. MM negative direction threshold voltage 2) Voltage waveform when abnormal voltage is detected. WF threshold voltage TD threshold voltage VILK VMM VLKT IMM (3m s) tOU T(45ms) VBTL(3.9V)NoiseVISL VWF tW F(55ms) VTD tTD (300ms) VB ILK VB MM OUT IBL WF TD OUT

EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC> -20 EL ECT R ICAL CHARACT ERISTICS (VCC = 5V and Ta = -20 – 80°C unless otherwise noted) Limits Min. Max.Symbol Test conditions UnitParameter IS2 Supply current 2 mA mA ms VS = 12V, D VILK = 0mV, Out : “OFF” 1.2 370 mA mVrms mA IMM+ IMM- tMM tOUT VSM IS3 ITD+ IS4 tDT VBLT IIBL IWF+ tWF Temperature Pin VS V mA mA mA V mA ms Test circuit VS = 16V, D VILK = -15mV, Out : “ON” VS = 16V, VLKT : 60Hz Test circuit 3 VS = 16V, D VILK = 0mV, VMM = 0.8V VS = 16V, D VILK = -15mV, VMM = 0.8V VS = 16V VS = 16V, D VILK = 0mV, VOUT = 0.2V VS = 16V, D VILK = -15mV VOUT = 0.8V Pin VS Pin ILK and VB Pin MM Pin MM Pin MM Pin OUT Pin OUT Pin OUT Pin VS Pin VS Pin VS Pin IBL Pin IBL Pin WF Pin WF Pin WF Pin TD Pin TD Pin TD VS = 16V IS = 3.5mA VS = 12V, VILK : 0mV VIBL = 0V, OUT : “OFF” Test circuit 2 VS = 12V, VILK : -15mV VIBL = 12V, OUT : “ON” Test circuit 2 VS = 16V VS = 16V, VIBL = 4.5V Test circuit 7 VS = 16V, VIBL = 4.5V, VWF = 0.5V VS = 16V, VIBL = 0V, VWF = 0.5V VS = 16V VS = 16V, VIBL = 0V, VTD = 0.5V VS = 16V, VIBL = 4.5V, VTD = 0.5V VS = 16V IS1 VLKT IOU+ IOU- IWF- ITD- Supply current 1 Trip voltage Sink current Source current Detect inhibit time Sink current Source current Output pulse width Maximum current voltage Supply current 3 Supply current 4 Trip voltage Input current Sink current Source current Recovery time Sink current Source current Delay time 170 -110 1.7 150 -200 -100 -70 3.6 -22 -22 200 -30 420 -30 4.1 0.8 1.4 100 0.7 -250 mA mA ms mA mA mA ms APP LICAT IO N EXA M PLE VCC VS Voltage regulator VB A • VLKT VBLT R X IBL WF TD Bias current source Comparator ComparatorAmplifier ILK VB MM OUT GND Delay circuit Output circuit Waveform regulator One-shot multivibrator RX C WF C TD C MM ZCT AN B AN B Load AC power input M5 4125L/P A Note 2 MZ Core Series by Soryo Denshi Kagaku Co., Ltd (Mitsubishi Subsidiary) Tel. +81-427-74-7813 Note 2 :

EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC> TEST CIRCUI T (C MM = 0.22mF, CTD = 6.8mF and R X = 27kW unless otherwise noted)

1 IS 1 and IS 2 Measurement 2 IS 3 and IS 4 Measurement

3 VLKT 4 IMM+ and IMM- Measurement

5 IOU+, IOU- Measurement 6 VSM Measurement

*:IS 2 is the value after OUT turns on. (Vout> 0.5V) *: IS 4 is the value after OUT turns on. *:VLKT is the value of VIBL when OUT turns on as VIBL is gradually increased. DVILK VOUT IS 1, IS 2 VS A C MM MD234 or Equivalent ILK VB MM OUT GND VS RX IBL WF TD VIBL VOUT VS C MM ILK VB MM OUT GND VS RX IBL WF TD VOUT IS 3, IS 4 VS A C MM ILK VB MM OUT GND VS RX IBL WF TD C TD C WF R X VIBL DVILK VMM VS A IM M + ILK VB MM OUT GND VS RX IBL WF TD IM M - DVILK V ILK VB MM OUT GND VS RX IBL WF TD VSM IS VOUT VS A C MM ILK VB MM OUT GND VS RX IBL WF TDIOU- DVILK IOU+

EARTH LEAKAGE CURRENT DETECTOR M 54125L/P MITSUBISHI <CONTROL / DRIVER IC>

7 VBLT ,IIBL Measurement 8 IWF +, IWF - Measurement

9 ITD +, ITD - Measurement 10 tMM ,tOUT Measurement

11 tWF Measurement 12 tTD Measurement *: VBLT is the value of VIBL when VF = 0.5V. VS A ILK VB MM OUT GND VS RX IBL WF TD V VIBL VWF IIBL R X VS ILK VB MM OUT GND VS RX IBL WF TD C MM VILK VOUT VILK VOUT 1.8V 0.5V 1.4V tOUTtMM 10ms VS ILK VB MM OUT GND VS RX IBL WF TD C TD VOUT R X C mF VIBL 0.5V 4.5V VOUT VIBL tTD VS ILK VB MM OUT GND VS RX IBL WF TD R X C mF 0.5V 3kW VTD VIBL 0.5V 4.5V VTD VIBL tWF VS ILK VB MM OUT GND VS RX IBL WF TD A VIBL R X VTD ITD + ITD - VS A ILK VB MM OUT GND VS RX IBL WF TD VWF R X VIBL IWF + IWF -