STP16DPPS05 datasheet(21/35 Pages) STMICROELECTRONICS

No de pièce	STP16DPPS05

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

PDF	35 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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21 / 35 page

DocID15817 Rev 3

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STP16DPPS05

Error detection mode functionality

7.3

Phase three: resuming normal mode

The sequence for reentering normal mode is shown in the following table:

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

Error detection conditions

Note:

Where: IO = the output current programmed by the R-EXT, IODEC = the detected output

current in detection mode

Figure 22. Detection circuit

Figure 21. Resuming normal mode - timing diagram

CLK

1°2°3°4°5°

OE/DM2

HHH

LE/DM1

LLLLL

Table 14. 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

STP16DPPS05

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