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HV506 Datasheet(PDF) 8 Page - Supertex, Inc |
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HV506 Datasheet(HTML) 8 Page - Supertex, Inc |
8 / 9 page 8 HV506 + HV - (VDD - VSS) VSS - HV High Impedance High Impedance High Impedance Output n Output n+1 Sink* SCR Source* SCR D2* tOFF (D2) D1* 0V Drive Current Disabled Drive Current Disabled tOFF (D1) tOFF (Sink SCR) tOFF (Source SCR) HV Switching Waveforms and Operation To drive a TFEL row with a negative pulse: The desired sink SCR is enabled and V SS is connected to -HV via a current limited switch. After holding the output at the -HV level, the switch is opened in order to set the sink SCR current to zero. The row is then discharged through a discharge diode when D 2 is switched to GND. The application of a positive pulse to a row operates in a similar manner using the selected source SCR and D 1. * Notes internal device handling current flow. Refer to Typical Output Circuit Connections for schematic. |
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