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LED6000 Arkusz danych(PDF) 18 Page - STMicroelectronics

Numer części LED6000
Szczegółowy opis  3 A, 61 V monolithic current source with dimming capability
PDF  49 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED6000 Arkusz danych(HTML) 18 Page - STMicroelectronics

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Functional description
LED6000
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DocID027777 Rev 2
In Figure 11 a very short DIM pulse is shown, measured in the standard demonstration
board, VIN = 44 V, 12 LEDs. The programmed LED current, 1 A, is reached at the end of the
DIM pulse (35 µs).
Figure 11. Dimming operation - short DIM pulse
The above consideration is crucial when short DIM pulses are expected in the final
application. Once the external power components and the compensation network are
selected, a direct measurement to determine tRISE and tFALL is necessary to certify the
achieved dimming performance.
When the DIM is forced above the VDIMH threshold after TDIMTO has elapsed, a new soft-
start sequence is performed.



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