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AS3677 Fiches technique(PDF) 21 Page - ams AG

No de pièce AS3677
Description  High-efficiency step up DC/DC converter
PDF  106 Pages
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Fabricant  AMSCO [ams AG]
Site Internet  http://www.ams.com
Logo AMSCO - ams AG

AS3677 Fiches technique(HTML) 21 Page - ams AG

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ams Datasheet
Page 21
[v1-32] 2016-Sep-27
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AS3677 − Detailed Description
Charge Pump Mode Switching
If automatic mode switching is enabled (cp_mode_
switching =00 or cp_mode_switching = 01) the charge pump
monitors the current sinks, which are connected via an LED to
the output CPOUT. To identify these current sources (sinks), the
registers CP mode Switch1 and CP mode Switch2 (register bits
rgb1_on_cp to rgb3_on_cp, curr1_on_cp, curr2_on_cp and
curr6_on_cp) should be setup before starting the charge pump
cp_on = 1. If any of the voltage on these current sources drops
below the threshold (currlv_switch, currhv_switch), the next
higher mode is selected after the debounce time.
If the currX_on_cp=0 and the according current sink is
connected to the charge pump, the current sink will be
functional, but there is no up switching of the charge pump, if
the voltage compliance is too low for the current sink to supply
the specified current.
Figure 27:
Automatic Mode Switching

 
 

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AS3677



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