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ZXSC410 Fiches technique(PDF) 11 Page - Diodes Incorporated |
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ZXSC410 Fiches technique(HTML) 11 Page - Diodes Incorporated |
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11 / 12 page ![]() ZXSC410 ZXSC420 SEMICO NDUC TORS ISSUE 2 - May 2003 11 Sequencing AVDD and VON By adding the circuit below to the LCD bias output (VON)of the converter a 10ms delay can be achieved between AVDD power up and VON power up. The circuit operates by a delay in turning the PMOS transistor on, which transfers to a 10ms delay between input and output of the circuit. The delay is set by the RC time constant of R1 and C1. The diode, D1, discharges the gate of the PMOS when the main system supply is turned off, guaranteeing a delay every turn on cycle. |
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