AN3090 datasheet(14/19 Pages) STMICROELECTRONICS

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AN3090 데이터시트(PDF) 14 Page - STMicroelectronics

부품명	AN3090

상세설명	Power saving and LED status detection using the STP16DPPS05 device

PDF	19 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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14 / 19 page

Auto power-saving feature

AN3090

14/19

Doc ID16496 Rev 1

Auto power-saving feature

This section explains the benefits of the auto power-saving feature of the STP16DPPS05

device.

The plot in Figure 9 shows the IDD supply voltage consumption during normal mode and in

the auto power-saving condition.

Figure 9.

IDD consumption in normal mode and auto power-saving condition

In the plot above, IDD consumption (Ch4 green) falls after 16 CLK pulses (Ch2 blue) if no

SDI data (Ch1 yellow) were latched by the LE/DM1 signal (Ch3 purple). When the first

active data is available on the SDI pin (Ch1) and is latched by the LE/DM1 signal (Ch3), the

device switches from auto power-saving mode to normal mode and IDD consumption rises to

typical values.

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