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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L99LD02 데이터시트(PDF) 27 Page - STMicroelectronics |
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L99LD02 데이터시트(HTML) 27 Page - STMicroelectronics |
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27 / 66 page  DS12448 Rev 3 27/66 L99LD02 Functional description 64 in particular bit 27 FE1 is set. In normal mode the boost controllers are latched off, until the following conditions are fulfilled: TJX drops below the thermal shutdown reset threshold TTSD-TTSD_HYS. Subsequently the microcontroller sends a read and clear command, in order to reset OVT bit. In fail safe mode (Limp Home), the device applies an auto restart with a period equal to tAUTORESTART, provided that the TJX falls below TSD reset threshold (TTSD-TTSD_HYS). 4.2.4 VS under voltage lockout Provided device is not supplied from BST_OUT if the VS supply falls below VS_UV (VS under voltage threshold), the boost controllers will be deactivated, regardless of the SPI control register. This feature is implemented, in order to avoid an operation of the external mosfet of the boost controller in linear mode, due to a too low gate driver supply. In this case, BST_OUT_SUPPLY bit is not set whilst VS_UV_FAIL bit is set (see bit <13> on Table 26: SR#1: Status Register 1) |
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