STMicroelectronics LED7707 Application Note page 3

AN2810
List of figures
Figure 1. LED7707 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. LED7707 demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Top side component placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Bottom side test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. SW1 (F
SW
Figure 6. SW2 (MODE) setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. LED7707 demonstration board and white LED test board assembly . . . . . . . . . . . . . . . . . 11
Figure 8. LED7707 demonstration board test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9. LED7707 synchronization setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10. Efficiency measurement setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11. Efficiency vs. DIM duty cycle, V
Figure 12. Efficiency vs. DIM duty cycle, V
) setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IN
IN
Doc ID 14893 Rev 1
=12 V, 6 rows, 10 white LEDs in series, I
=24 V, 6 rows, 10 white LEDs in series, I
List of figures
= 360 mA 15
OUT
= 360 mA 15
OUT
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