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AS3658F-BCTP датащи(PDF) 45 Page - ams AG

номер детали AS3658F-BCTP
подробное описание детали  Power and Audio Management Unit for Portable Devices
PDF  158 Pages
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производитель  AMSCO [ams AG]
домашняя страница  http://www.ams.com
Logo AMSCO - ams AG

AS3658F-BCTP датащи(HTML) 45 Page - ams AG

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Revision 1v13
44 - 157
AS3658
Data Sheet Confidential - Detail ed Descri ption-Power Management Functions
8.7
External Step Down/Linear Charger
The inductive dcdc step down charger (or the external linear charger) converts the input voltage from VCHARGER to
VSUPPLY. The system (DCDC converters, LDOs…) are connected directly to VSUPPLY; the ideal diode and the internal
battery switch SINT (together with the external battery switch MBATSW) connect VSUPPLY to VBAT to allow charging of
the battery.
Figure 14. Step Down Charger Application Diagram with optional reverse polarity and short protection
If the input voltage can be up to 50V additional three transistors and a simple voltage regulator with a zener diode are
required. These circuit ‘isolates’ the AS3658 from the high input voltage and keep the pins VCHARGER, VOFF_B and
VGATE within its operating limits (<15V). The actual circuit is shown in the following figure:

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