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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9788 데이터시트(PDF) 110 Page - STMicroelectronics |
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L9788 데이터시트(HTML) 110 Page - STMicroelectronics |
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110 / 264 page  High/low-side drivers - STARTER STR[1:3] L9788 110/264 DS12308 Rev 4 Figure 42. OFF state diagnostic HS config Figure 43. High-side driver OFF state fast pull down current behavior By default diagnostic pull up/down currents are disabled and comparator outputs are masked by internal logic, to enable OFF state diagnostic the channel must be put first in tristate condition and then (if not already done with previous MSC frames) diagnostic must be enabled. Once the desired channel is put in tristate a false diagnostic can be sensed due to the time needed to discharge output voltage through the load. A Filter Time (Diag Filter Time) is implemented in order to avoid detecting false diagnosis as shown in Figure 44. GADG0512160753PS Normal function Open Load Short toVB VOUTOPEN VOUTOPEN max VOUTOPENmin 1.9V V_OUTx (high-side) 3V VHVTmin V-OL_THmax Open Load GADG0512160803PS I_diag I_HS_PD1+I_HS_PD2 I_HS_PD2 Tflt_diagoff1 t Voutx Tflt_diagoff1 t VHVT I_diag I_HS_PD1+I_HS_PD2 I_HS_PD2 Tflt_diagoff1 t Voutx Tflt_diagoff1 t VHVT |
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