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AS3630 Datasheet(PDF) 26 Page - ams AG |
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AS3630 Datasheet(HTML) 26 Page - ams AG |
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26 / 72 page  AS3630 – 26 8A Supercap Flash Driver Flash Operation Additionally the step up converter DCDC1 (from VIN using LDCDC1), the step up converter DCDC2 (from Supercap using LDCDC2) is used in parallel operating at high efficiency for the flash operation. This allows to reduce the current for each of the DCDC’s and therefore the size of the Supercap and/or current required from battery: Figure AS3630 – 22: Flash DCDC1 and DCDC2 Parallel Operation to Reduce Current and Size of Supercap The flash operation is enabled by mode_setting = “Flash” and the timeout timer (register flash_timeout) defines the maximum flash duration. Note: If the voltage on VSUPERCAP drops below 2.55V, DCDC2 is automatically stopped (and the flash current is supplied by DCDC1 only). Once the flash is finished, the AS3630 will automatically select the operating mode according to register mode_after_flash (see page 51) shown in Figure 26: !"# $% & '#! # ! ) '# *+ $, !- .% / 0 1 0 0 2 -3 - 2 2 0 2 -3 ' ! -'## ! +, 2 -3 ' ! -'## ! +, 0 |
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