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AS1170 Datasheet(PDF) 18 Page - ams-OSRAM AG |
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AS1170 Datasheet(HTML) 18 Page - ams-OSRAM AG |
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18 / 53 page  AS1170 Detailed description Datasheet • PUBLIC • Document Feedback DS001083 • v2-00 • 2024-Feb-05 18 / 53 / Figure 17: Internal circuit of 4 MHz / 1 MHz selection (1) For simplicity Figure 17 shows only a single current sink. 7.3 Protection and fault detection functions The protection functions protect the AS1170 and the LED(s) against physical damage. In most cases a fault register bit is set, which can be readout by the I²C interface. The fault bits are automatically cleared by an I²C readout of the fault register. Additionally the DCDC is stopped and the current sinks are disabled5 by resetting out_on=0, mode_setting=00. 7.4 Overvoltage protection In case of no or a broken LED(s) at the pin LED_OUT1/2 and an enabled DCDC converter, the voltage on VOUT1/2 rises until it reaches VVOUTMAX (overvoltage condition) and the voltage 5 Applies for all faults. |
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