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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STP1612PW05 датащи(PDF) 20 Page - STMicroelectronics |
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STP1612PW05 датащи(HTML) 20 Page - STMicroelectronics |
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20 / 35 page  Error detection conditions STP1612PW05 20/35 Doc ID 15819 Rev 4 10 Error detection conditions The STP1612PW05 can detect open channels (OD) and LED short-circuits (SD). The detection circuitry performs open- and short-circuit detection simultaneously and the image quality will not be impacted since the test duration is short (0.5 µs typ). To perform the open-circuit, short-circuit error detection a channel must be on, the command “enable error detection” starts the detection. After 0.5 µs (typ) the command “read error status code” allows to get the status from the serial output (SDO). Note: Where: IO = the output current programmed by the REXT, IODEC = the detected output current in detection mode Figure 11. Detection circuit Table 14. Detection conditions (VDD = 3.3 to 5 V temp. range -40 to 125 °C) SW-1 or SW-3b Open line or output short to GND detected ==> IODEC ≤ 0.5 x IO SW-2 or SW-3a Short on LED or short to V-LED detected ==> VO ≥ 2.3 V 16 STP1612PW05 |
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