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STP16DPP05 Datasheet(PDF) 21 Page - STMicroelectronics

No. de pieza STP16DPP05
Descripción Electrónicos  Low voltage 16-bit constant current LED sink driver with output error detection
PDF  34 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STP16DPP05 Datasheet(HTML) 21 Page - STMicroelectronics

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STP16DPP05
Error detection mode functionality
DocID16518 Rev 4
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7.3
Phase three: resuming normal mode
The sequence for reentering normal mode is shown in the following table:
Table 14: Resuming normal mode - timing diagram
CLK
1°
2°
3°
4°
5°
OE/DM2
H
L
H
H
H
LE/DM1
L
L
L
L
L
For proper
device operation, the “entering error detection” sequence must be
followed by a “resume mode” sequence, it is not possible to insert consecutive
equal sequences.
7.4
Error detection conditions
Table 15: Detection conditions (VDD = 3.3 to 5 V, temperature range -40 to 125 °C)
Configuration
Detect mode
Detection results
SW-1 or SW-3b
Open line or output
short to GND detected
==> IODEC
≤ 0.5 x IO
No error
detected
==> IODEC
≥ 0.5 x IO
SW-2 or SW-3a
Short on LED or short
to V-LED detected
==> VO
≥ 2.6 V
No error
detected
==> VO
≤ 2.3 V
Where: IO = the output current programmed by the R-EXT, IODEC = the detected
output current in detection mode
Figure 21: Detection circuit



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