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AN3981 Datasheet(PDF) 33 Page - STMicroelectronics

Part # AN3981
Description  LED array drivers
PDF  54 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3981 Datasheet(HTML) 33 Page - STMicroelectronics

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AN3981
STP24DP05
Doc ID 022217 Rev 1
33/54
4.8
Data flow management
The data are transferred from the shift register to each color group with a sequence defined
by the status of pins DF0 and DF1 and clarified in Figure 39.
Figure 39.
Data flow management
4.9
Gradual output delay
This feature is used to prevent high inrush current due to the simultaneous turning on of all
LEDs at the start of a video frame and so reducing the input capacitor value.
The gradual output delay can be activated by setting low the DG pin. A default delay of 30 ns
for each group (RGB) is implemented, as clarified by Figure 40.
Figure 40.
Gradual output delay



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