AN3981 datasheet(32/54 Pages) STMICROELECTRONICS

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STP24DP05

AN3981

32/54

Doc ID 022217 Rev 1

Figure 37.

Error detection results interpretation

The correct interpretation of the detection results can be affected by any setup/hold time

problem.

The same considerations regarding

and LE timing, done in Section 2.6.1, apply also to

24-bit LED array drivers.

Incorrect results of the error detection can be due also to an inappropriate choice of the LED

supply voltage. The rules to suitably define the LED supply voltage are discussed in

Section 5.1.

4.7

Flag pins

The EF and TF pins are two open drain outputs dedicated to reporting the STP24DP05,

respectively an output faulty condition (detected with the error detection process) or an

overtemperature event.

Typically these outputs are externally pulled up, as shown in Figure 38.

In case an error or an overtemperature is detected, the internal switch connected to the

respective output flag (EF or TF) is turned on.

Figure 38.

Error flag and overtemperature flag pin connection

AN3981 Datasheet(PDF) 32 Page - STMicroelectronics