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FODM3062 Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FODM3062 Datasheet(HTML) 6 Page - Fairchild Semiconductor |
6 / 13 page ©2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FODM3062, FODM3063, FODM3082, FODM3083 Rev. 1.0.9 6 Typical Applications Figure 8. Static dv/dt Test Circuit Vdc 800V (FODM3082) (FODM3083) 600V (FODM3062) (FODM3063) R = 10 k Ω CTEST X100 SCOPE PROBE PULSE INPUT MERCURY WETTED RELAY 378V (FODM3062, FODM3063) 504V (FODM3082, FODM3083) 0 VOLTS APPLIED VOLTAGE WAVEFORM Vmax = dv/dt = 0.63 Vmax RTEST D.U.T. D.U.T. τRC τRC = 800V (FODM3082, FODM3083) = 600V (FODM3062, FODM3063) = 378 τRC (FODM3062, FODM3063) = 504 τRC (FODM3082, FODM3083) Note: This optoisolator should not be used to drive a load directly. It is intended to be a trigger device only. 1. The mercury wetted relay provides a high speed repeated pulse to the D.U.T. 2. 100x scope probes are used, to allow high speeds and voltages. 3. The worst-case condition for static dv/dt is established by triggering the D.U.T. with a normal LED input current, then removing the current. The variable RTEST allows the dv/dt to be gradually increased until the D.U.T. continues to trigger in response to the applied voltage pulse, even after the LED current has been removed. The dv/dt is then decreased until the D.U.T. stops triggering. tRC is measured at this point and recorded. Figure 9. Inverse-Parallel SCR Driver Circuit (240VAC) VCC Rin 1 2 4 3 240 VAC SCR 360 Ω R1 D1 SCR R2 D2 LOAD Suggested method of firing two, back-to-back SCR’s, with a Fairchild triac driver. Diodes can be 1N4001; resistors, R1 and R2, are optional 330 ohms. Note: This optoisolator should not be used to drive a load directly. It is intended to be a trigger device only. FODM3062 FODM3063 FODM3082 FODM3083 |
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