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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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AS1181 Arkusz danych(PDF) 30 Page - ams-OSRAM AG |
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AS1181 Arkusz danych(HTML) 30 Page - ams-OSRAM AG |
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30 / 92 page  AS1181 Functional description Datasheet • PUBLIC • Document Feedback DS001139 • v3-00 • 2026-Apr-01 30 / 92 / 7.2 Safety monitors AS1181 integrates several safety features to detect open or shorted LEDs and to avoid unwanted overcurrent situations also under single fault conditions. Safety features are implemented on the high side (LP - Anode) and low side (LNx - Cathode) of the LEDs as shown in the detailed block diagram below. All safety features are operating fully self-contained and do not require an external host to shut down illumination. Figure 30: Block diagram safety monitors LP VLED LN0- LN7 VP2 VP18 VGMAX V_FB_MAX reference ref VLED_FB_UV VON VGATE_MAX GATE_LOW VSHORT VOPEN V_FB_MIN 10µA Open/Short VLED_FB_OV VLED_OV VLED_OPEN ~50mV Iref short short LP short LP Test Iref short vss 250R x 256 8bit Power Switch / over current detection LDO over current |
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