AN3981 datasheet(5/54 Pages) STMICROELECTRONICS

5 / 54 page

AN3981

List of figures

Doc ID 022217 Rev 1

5/54

Figure 43.

Maximum power dissipation vs. ambient temperature for different packages for 4-bit

LED drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 44.

Maximum power dissipation vs. ambient temperature for different packages for 8-bit

LED drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 45.

Maximum power dissipation vs. ambient temperature for different packages for 16-bit

LED drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 46.

Maximum power dissipation vs. ambient temperature for 24-bit LED drivers (TQFP-48). . 39

Figure 47.

Maximum power curves for different packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 48.

Thermal performance of the TSSOP- 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 49.

Thermal performance of the HTSSOP - 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 50.

LED drivers connected in daisy chain configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 51.

Example of data loading for devices connected in daisy chain . . . . . . . . . . . . . . . . . . . . . 42

Figure 52.

Example of current regulation for more devices at the same time . . . . . . . . . . . . . . . . . . . 43

Figure 53.

Channel current vs. RREG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 54.

PWM dimming using the pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 55.

Example showing how to perform a PWM dimming separately for each channel . . . . . . . 45

Figure 56.

Description of shorted adjacent pin detection strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 57.

Possible implementation of the shorted adjacent pin detection algorithm . . . . . . . . . . . . . 47

Figure 58.

High current capability solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 59.

LED matrix panel driving solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 60.

LED matrix timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 61.

LED matrix driving example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 62.

Example of propagation delay of serial data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 63.

Digital signal quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

AN3981 Datasheet(PDF) 5 Page - STMicroelectronics

AN3981 Datasheet(HTML) 5 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL