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SM8131B データシート(PDF) 10 Page - Nippon Precision Circuits Inc

部品番号 SM8131B
部品情報  The SM8131B is a charge pump DC/DC converter that switches between 1 and 1.5 automatically.
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メーカー  NPC [Nippon Precision Circuits Inc]
ホームページ  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8131B データシート(HTML) 10 Page - Nippon Precision Circuits Inc

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SM8131B
NIPPON PRECISION CIRCUITS INC.—10
Switching to power-save mode
The internal circuit operating mode switches from
×1.0/×1.5 mode to power-save mode when both EN1 and
EN2 go LOW and do not switch HIGH for an interval of 1.63ms (max). This function turns the LEDs OFF and
automatically transfers internal circuit control to power-save mode, suppressing current consumption.
(1) If the EN signals are input after power is applied and the POR time has expired, the internal enable signal
“CE” switches with the EN1
+ EN2 signal.
(2) If the internal enable signal “CE” goes from HIGH to LOW and are held for an interval greater than the
“CE” hold time 1.63ms (max), the SM8131B switches to power-save mode. The internal circuits are reset
on the “CE” falling edge, and the current setting must be re-established before restart.
EN input signal and internal enable signal “CE”
CE hold time 1.63ms (max)
EN1 input
EN2 input
EN1+EN2
Internal
enable (CE)
Power
save
Power
save
1.0 or 1.5
(1)
(2)


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