This series is designed for thyristor control in a variety of AC powerswitching applications for AC input voltages of 24 V, 120 V,208/230 V, and 277 V @ 50/60 Hz.
Applications:
•Relay Control•Valve Control•Heater Control•Lamp Control
•On–Off Motor Switching
•Differential Comparator with Self–Contained Power Supply forIndustrial Applications
•
Synchronous Switching of Flashing Lights
2VCCRS5ACLimiterPowerSupplyVCCInputCurrentRLZeroBoost312CrossingDetectorMT2VoltageInputAC400 Hz InputDC Mode or100RP14Protection4µF+CircuitTriacDriveGateMT115-V13+On/OffSensingAmp9-R*X10VCC11* NTC SensorGnd78Inhibit1External Trigger6Figure 1. Representative Block Diagram
AC Input VoltageInput SeriesDissipation Rating(50/60 Hz)Resistor (RS)for RSVackΩW242.00.5120102.0208/230204.0277255.0FUNCTIONAL BLOCK
DESCRIPTION
1.Limiter–Power Supply — Allows operation ofthe CA3059 directly from an AC line. Suggesteddropping resistor (RS) values are given in the tablebelow.
2.Differential On/Off Sensing Amplifier — Testsfor condition of external sensors or input commandsignals. Proportional control capability or hysteresismay be implemented using this block.
3.Zero–Crossing Detector — Synchronizes theoutput pulses to the zero voltage point of the AC cycle.This synchronization eliminates RFI when used withresistive loads.
4.Triac Drive — Supplies high–current pulses tothe external power controlling thyristor.
5.Protection Circuit — A built–in circuit may beactuated, if the sensor opens or shorts, to remove thedrive current from the external triac.
6.Inhibit Capability — Thyristor firing may beinhibited by the action of an internal diode gate atPin1.
7.High Power DC Comparator Operation —Operation in this mode is accomplished by connectingPin 7 to Pin 12 (thus overriding the action of thezero–crossing detector). When Pin 13 is positive withrespect to Pin 9, current to the thyristor is continuous.
CA3059
MAXIMUM RATINGSRatingDC Supply Voltage(Between Pins 2 and 7)DC Supply Voltage(Between Pins 2 and 8)Peak Supply Current (Pins 5 and 7)Fail–Safe Input Current (Pin 14)Output Pulse Current (Pin 4) (Note 1)Junction TemperatureOperating Temperature RangeStorage Temperature RangeSymbolVCC12VCC12I5,7I14IoutTJTATstg±502.0150150– 40 to + 85– 65 to + 150mAmAmA°C°C°CVdcValueUnitVdcELECTRICAL CHARACTERISTICS (Operation @ 120 Vrms, 50–60 Hz, TA = 25°C [Note 2])
CharacteristicDC Supply VoltageInhibit ModeRS = 10 k, IL = 0RS = 5.0 k, IL = 2.0 mAPulse ModeRS = 10 k, IL = 0RS = 5.0 k, RL = 2.0 mAGate Trigger Current(VGT = 1.0 V, Pins 3 and 2 connected)Peak Output Current, PulsedWith Internal Power Supply, VGT = 0Pin 3 OpenPins 3 and 2 ConnectedWith External Power Supply, VCC = 12 V, VGT = 0Pin 3 OpenPins 3 and 2 ConnectedInhibit Input Ratio(Ratio of Voltage @ Pin 9 to Pin 2)Total Gate Pulse Duration (CExt = 0)Positive dv/dtNegative dv/dtPulse Duration After Zero Crossing(CExt = 0, RExt = R)Positive dv/dtNegative dv/dtOutput Leakage Current Inhibit Mode (Note 3)Input Bias CurrentCoCommon Mode Input Voltage Rangeoodeuoageage(Pins 9 and 13 Connected)Inhibit Input VoltageExternal Trigger VoltageFigure2SymbolVS6.1—6.0—33IGTIOM50904——56tptn6tp1tn137—8—I4IIBVCMRV1V6–V4———————50600.0010.151.4 to 5.01.41.4——101.0—1.6—µAµAVdcVdcVdc7070100100140140µsV9/V20.4652303000.485——0.520—µs125190———6.56.16.46.21607.0—7.0——mAmAMinTypMaxUnitVdcNOTES:1.Care must be taken, especially when using an external power supply, that total package dissipation is not exceeded.2.The values given in the Electrical Characteristics Table at 120 V also apply for operation at input voltages of 24 V, 208/230 V, and 277 V, except forPulse Duration test. However, the series resistor (RS) must have the indicated value, shown in Table A for the specified input voltage.3.I4 out of Pin 4, 2.0 V on Pin 1, S1 position 2.
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CA3059
TEST CIRCUITS(All resistor values are in ohms)RS10 kAC Line791011Pulse0.3 kInhibit4.6 k54.6 k1325IOMorIGT41 Ω±1%OscilloscopeWithHigh-GainInputRLVS11100 µFIL8491081321ExternalLoadCurrent5 k5 k3S12100 µFVGTRSAC Line7Figure 2. DC Supply Voltage
Figure 3. Peak Output (Pulsed) and GateTrigger Current with Internal Power Supply
100 µF325 k5 kRS10 k120 Vrms60 Hz471098511IOM1 Ω ± 1%VGTOscilloscopeWithHigh-GainInput5910116RS10 k120 Vrms60 Hz131247813142R1100 µFR2Figure 4. Peak Output Current (Pulsed)
with External Power Supply
Figure 5. Input Inhibit Ratio
Gate PulsePositivedv/dtZeroVoltagetP1tP120Vrms 60HzRS10 kCExt57AC LineNegativedv/dt9tN1101141 k132tNVCC = 6.0 V2OscilloscopeWithHigh-GainInput+ 3.0 V9IIB137812RExt85 k5 k100 µFFigure 6. Gate Pulse Duration Test Circuit
with Associated Waveform
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Figure 7. Input Bias Current Test Circuit
CA3059
TYPICAL CHARACTERISTICS
10 k5910112IOM, PEAK OUTPUT CURRENT (PULSED) [mA]3002502001501005005.0120 Vrms, 60 HzGate Voltage = 08.09.0106.07.011EXTERNAL POWER SUPPLY VOLTAGE (V)12Pins 2 and 3 ConnectedPin 3 Open1478141339 kVIR15 kR25 kFigure 8. Inhibit Input Voltage Test
Figure 9. Peak Output Current (Pulsed)versus External Power Supply Voltage
IOM, PEAK OUTPUT CURRENT (PULSED) [mA]160
TOTAL PULSE WIDTH ( µ s)1401301201101009010080120 Vrms, 60Hz140
120 Vrms, 60 Hz Operation120
120 Vrms, 60 HzGate Voltage = 0100
- 40- 20020406080- 40- 20020406080100TA, AMBIENT TEMPERATURE (°C)TA, AMBIENT TEMPERATURE (°C)
Figure 10. Peak Output Current (Pulsed)
versus Ambient TemperatureFigure 11. Total Pulse Width versus
Ambient Temperature
0.527.06.86.66.46.26.0
- 40- 20020406080100Inhibit ModeV9/V2, INHIBIT VOLTAGE RATIOVS ,INTERNAL SUPPLY (V)0.500.480.460.440.420.40120 Vrms, 60 HzTA, AMBIENT TEMPERATURE (°C)
- 40- 200204060TA, AMBIENT TEMPERATURE (°C)
80100Figure 12. Internal Supply versus
Ambient TemperatureFigure 13. Inhibit Voltage Ratio versus
Ambient Temperature
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CA3059
RPCF 100 µF15 V+-2InhibitInput1RxNTC Sensor1310 k1050 k153CurrentBoost99.6 k1182570 µAAC LineInput
RS585 k35 µA30 k30 k30 k53 µA150 µA50 k5 k4ToThyristorGate12For DC Modeor 400 HzOperation
14Fail-SafeInput
To
Common
76ForExternalTrigger
NOTE:Current sources are established by an internal reference.
Figure 14. Circuit Schematic
APPLICATION INFORMATION
Power Supply
The CA3059 is a self–powered circuit, powered from theAC line through an appropriate dropping resistor (seeTable A). The internal supply is designed to power theauxiliary power circuits.
In applications where more output current from theinternal supply is required, an external power supply ofhigher voltage should be used. To use an external powersupply, connect Pin5 and Pin 7 together and apply thesynchronizing voltage to Pin 12 and the DC supply voltageto Pin 2 as shown in Figure4.
Operation of Protection Circuit
b.Sensor Resistance (RX) and RP values should bebetween 2 kΩ and 100 kΩ.
c.The relationship 0.33 < RX/RP < 3 must be met overthe anticipated temperature range to prevent
undesired activation of the circuit. A shunt or seriesresistor may have to be added.
External Inhibit Function
A priority inhibit command applied to Pin 1 will removecurrent drive from the thyristor. A command of at least+1.2 V @ 10 µA is required. A DTL or TTL logic 1 appliedto Pin 1 will activate the inhibit function.
DC Gate Current Mode
The protection circuit, when connected, will removecurrent drive from the triac if an open or shorted sensor isdetected. This circuit is activated by connecting Pin 13 toPin14 (see Figure 1).
The following conditions should be observed when theprotection circuit is utilized:
a.The internal supply should be used and the externalload current must be limited to 2 mA with a 5 kΩdropping resistor.
When comparator operation is desired or inductive loadsare being switched, Pins 7 and 12 should be connected. Thisconnection disables the zero–crossing detector to permit theflow of gate current from the differential sensing amplifieron demand. Care should be exercised to avoid possibleoverloading of the internal power supply when operating thedevice in this mode. A resistor should be inserted betweenPin 4 and the thyristor gate in order to limit the current.
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CA3059
PACKAGE DIMENSIONS
PLASTIC PACKAGECASE 646–06ISSUE M
NOTES:1.DIMENSIONING AND TOLERANCING PER ANSIY14.5M, 1982.2.CONTROLLING DIMENSION: INCH.3.DIMENSION L TO CENTER OF LEADS WHENFORMED PARALLEL.4.DIMENSION B DOES NOT INCLUDE MOLD FLASH.5.ROUNDED CORNERS OPTIONAL.INCHESMILLIMETERSMINMAXMINMAX0.7150.77018.1618.800.2400.2606.106.600.1450.1853.694.690.0150.0210.380.530.0400.0701.021.780.100 BSC2.54 BSC0.0520.0951.322.410.0080.0150.200.380.1150.1352.923.430.2900.3107.377.87---10 ---10 __0.0150.0390.381.01148B17AFN–T–SEATINGPLANELCHGD14 PLKMJMDIMABCDFGHJKLMN0.13 (0.005)http://onsemi.com
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CA3059
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CA3059
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