6 PIN DIP ZERO-CROSS TRIAC DRIVER PHOTOCOUPLER
EL303X, EL304X, EL306X, EL308X Series
Features:
• Peak breakdown voltage
- 250V: EL303X
- 400V: EL304X
- 600V: EL306X
- 800V: EL308X
• High isolation voltage between input and output (Viso=5000 V rms )
• Zero voltage crossing
• Pb free and RoHS compliant
• UL and cUL approved(No. E214129)
• VDE approved (No.132249)
• SEMKO approved
• NEMKO approved
• DEMKO approved
• FIMKO approved
Applications
• Solenoid/valve controls
• Light controls
• Static power switch
• AC motor drivers
• E.M. contactors
• Temperature controls
• AC Motor starters
The high voltage pulse is set to the required VPEAK value and applied to the D.U.T. output side through the RC circuit above. LED current is not applied. The waveform VT is monitored using a x100 scope probe. By varying RTEST, the dv/dt (slope) is increased, until the D.U.T. is observed to trigger (waveform collapses). The dv/dt is then decreased until the D.U.T. stops triggering. At this point, ?RC is recorded and the dv/dt calculated.
For example, VPEAK = 600V for EL306X series. The dv/dt value is calculated as follows:
