STAP16DPPS05XTTR(2015) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STAP16DPPS05XTTR
(Rev.:2015)

Low voltage 16-bit constant current LED sink driver with output error detection and auto power-saving for automotive applications

STMicroelectronics 

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 (VDD = 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

==> IODEC ≤ 0.5 x IO

Short on LED or short

to V-LED detected

==> VO ≥ 2.6 V

No error

detected

No error

detected

==> IODEC ≥ 0.5 x IO

==> VO ≤ 2.3 V

Where: IO = the output current programmed by the REXT, IODEC = the detected output

current in detection mode.

Figure 21. Detection circuit

STAP1166DPPS05

DocID024306 Rev 6

AM13669v1

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