MOC3051-M è un optoaccoppiatore di output driver TRIAC a fase random da 600V. Questo prodotto è costituito da un diodo emettitore a infrarossi in AlGaAs accoppiato a un interruttore AC bilaterale in silicio non-zero-crossing (TRIAC). Isola la logica a bassa tensione dalle linee da 115VAC e 240VAC per fornire un controllo di fase randomica dei TRIAC o tiristori ad alta corrente. Questo dispositivo dispone di una capacità dv/dt statica molto aumentata, per assicurare performance di commutazione stabile dei carichi induttivi.
- Stabilità IFT eccellente
- Diodo emettitore a RI con bassa degradazione
elettronica di consumo, controllo e azionamento motori, ambito industriale, gestione potenza elettrica, illuminazione
MOC3051 Series consists of a GaAs infrared LED optically coupled to a nonZerocrossing silicon bilateral AC switch (triac). The MOC3051 Series isolates low voltage logic from 115 and 240 Vac lines to provide random phase control of high current triacs or thyristors. The MOC3051 Series features greatly enhanced static dv/dt capability to ensure stable switching performance of inductive loads. To order devices that are tested and marked per VDE 0884 requirements, the suffix “V” must be included at end of part number. VDE is a test option. Recommended for 115/240 Vac(rms) Applications: Solenoid/Valve Controls Lamp Ballasts Static AC Power Switch Interfacing Microprocessors to 115 and 240 Vac Peripherals MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
Rating INFRARED EMITTING DIODE Reverse Voltage Forward Current Continuous Total Power Dissipation = 25°C Negligible Power in Triac Driver Derate above 25°C OUTPUT DRIVER OffState Output Terminal Voltage Peak Repetitive Surge Current (PW = 100 µs, 120 pps) Total Power Dissipation = 25°C Derate above 25°C TOTAL DEVICE Isolation Surge Voltage (1) (Peak ac Voltage, 60 Hz, 1 Second Duration) Total Power Dissipation = 25°C Derate above 25°C Junction Temperature Range Ambient Operating Temperature Range Storage Temperature Range Soldering Temperature (10 s) VISO TJ TA Tstg to +150 Vac(pk) mW mW/°C °C VDRM ITSM PD Volts A mW mW/°C IF PD Volts mA mW mW/°C Symbol Value UnitSolid State Relays Incandescent Lamp Dimmers Temperature Controls Motor Controls
ANODE CATHODE NC MAIN TERMINAL SUBSTRATE DO NOT CONNECT 6. MAIN TERMINAL
260 1. Isolation surge voltage, VISO, is an internal device dielectric breakdown rating. 1. For this test, Pins 1 and 2 are common, and Pins 4, 5 and 6 are common.
Characteristic INPUT LED Reverse Leakage Current (VR 3 V) Forward Voltage (IF = 10 mA) OUTPUT DETECTOR (IF = 0 unless otherwise noted) Peak Blocking Current, Either Direction (Rated VDRM, Note 1) @ IFT per device Peak OnState Voltage, Either Direction (ITM 100 mA Peak) Critical Rate of Rise of OffState Voltage 400 V (Refer to test circuit, Figure 10) COUPLED LED Trigger Current, Either Direction, Current Required to Latch Output (Main Terminal Voltage 3 V, Note MOC3051 MOC3052 Holding Current, Either Direction IFT µA mA IDRM VTM dv/dt static nA Volts V/µs VF µA Volts Symbol Min Typ Max Unit
1. Test voltage must be applied within dv/dt rating. 2. All devices are guaranteed to trigger an IF value less than or equal to max IFT. Therefore, recommended operating IF lies between max 15 mA for 10 mA for 3052 and absolute max IF (60 mA).Figure 1. LED Forward Voltage versus Forward Current
IFT versus Temperature (normalized) This graph shows the increase of the trigger current when the device is expected to operate at an ambient temperature below 25°C. Multiply the normalized IFT shown on this graph with the data sheet guaranteed IFT. Example: 40°C, IFT 10 mA IFT 14 mAIFT, NORMALIZED LED TRIGGER CURRENT 25 NORMALIZED TO: PWin 100 µs
Phase Control Considerations LED Trigger Current versus PW (normalized) Random Phase Triac drivers are designed to be phase controllable. They may be triggered at any phase angle within the AC sine wave. Phase control may be accomplished an AC line zero cross detector and a variable pulse delay generator which is synchronized to the zero cross detector. The same task can be accomplished by a microprocessor which is synchronized to the AC zero crossing. The phase controlled trigger current may be a very short pulse which saves energy delivered to the input LED. LED trigger pulse currents shorter than 100 µs must have an increased amplitude as shown on Figure 4. This graph shows the dependency of the trigger current IFT versus the pulse width t (PW). The reason for the IFT dependency on the pulse width can be seen on the chart delay t(d) versus the LED trigger current. IFT in the graph IFT versus (PW) is normalized in respect to the minimum specified IFT for static condition, which is specified in the device characteristic. The normalized IFT has to be multiplied with the devices guaranteed static trigger current. Example: Guaranteed IFT = 10 mA, Trigger pulse width 3 µs IFT (pulsed) 50 mAFigure 4. LED Current Required to Trigger versus LED Pulse Width
Figure 5. Minimum Time for LED TurnOff to Zero Cross of AC Trailing Edge
Minimum LED Off Time in Phase Control Applications In Phase control applications one intends to be able to control each AC sine half wave from to 180 degrees. Turn on at zero degrees means full power and turn at 180 degree means zero power. This is not quite possible in reality because triac driver and triac have a fixed turn on time when activated at zero degrees. At a phase control angle close to 180 degrees the driver’s turn on pulse at the trailing edge of the AC sine wave must be limited to end 200 µs before AC zero cross as shown in Figure 5. This assures that the triac driver has time to switch off. Shorter times may cause loss of control at the following half cycle