STP08CDC596 datasheet(10/20 Pages) STMICROELECTRONICS

tên linh kiện	STP08CDC596

Giải thích chi tiết về linh kiện	8-BIT CONSTANT CURRENT LED SINK DRIVER WITH FULL OUTPUT DETECTION

PDF	20 Pages

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10 / 20 page

STP08CDC596

10/20

The LEDs status will be detected al least in 2

microseconds and after this time the micro

controller puts OE in HIGH state and the output

data detection result will go to the microprocessor

via SDO.

The detection data format is the same of data in

normal mode. As soon as all the detection data

bits are available on the serial line, the device may

go back to normal mode operation.

CONDITIONS IN ORDER TO GET A SUCCESSFULLY DETECTION CONDITION

Table 10: Detection Condition (VDD = 3.3 to 5 V Temp. Range -40 to 85°C)

where: IO = the output current programmed by the REXT, IODEC = the detected output current in detection mode.

Figure 15: Detection Mode

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 ≥ 2.4 V

No error detected

==> VO ≤ 2.2 V

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