STAP16DPPS05 Datasheet, PDF (23/33 Pages) STMicroelectronics – Low voltage 16-bit constant current LED sink driver

STAP16DPPS05
Error detection mode functionality
7.3
Phase three: resuming normal mode
The sequence for re-entering 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
Note:
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
Note:
Error detection conditions
Table 15. Detection conditions (V_DD = 3.3 to 5 V, temperature range -40 to 125 °C)
Configuration
Detect mode
Detection results
SW-1 or
SW-3b
SW-2 or
SW-3a
Open line or output
short to GND detected
==> I_ODEC ≤ 0.5 x I_O
Short on LED or short
to V-LED detected
==> V_O ≥ 2.6 V
No error
detected
No error
detected
==> I_ODEC ≥ 0.5 x I_O
==> V_O ≤ 2.3 V
Where: I_O = the output current programmed by the R_EXT, I_ODEC = the detected output
current in detection mode.
Figure 21. Detection circuit
STAP₁16₆DPPS05
DocID024306 Rev 6
AM13669v1
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