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PR4101 데이터시트(PDF) 8 Page - PREMA Semiconductor.

부품명 PR4101
상세설명  High Power LED Buck Driver
PDF  24 Pages
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제조업체  PREMA [PREMA Semiconductor.]
홈페이지  https://www.prema.com/
Logo PREMA - PREMA Semiconductor.

PR4101 데이터시트(HTML) 8 Page - PREMA Semiconductor.

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LED Driver PR4101
Examples for varying LED applications
TYPICAL APPLICATION WITH 12 VDC SUPPLY
The shown circuit drives 2 strings of 2 LEDs in series from a 12 VDC supply. The minimum supply voltage
is given by the forward voltage of the LEDs, the DC resistance of the inductor, and the RDSon of the FET. As
a rule of thumb, in most cases the supply voltage should be at least 2 V higher than the forward voltage
of the LEDs. Assuming a VF of 3.5 V per LED, this means that the circuit will work with a supply of 9V and
higher.
As there are two strings of LEDs in parallel, the forward voltage of the LEDs must be matching to avoid
an unequal current distribution.
© PREMA Semiconductor GmbH 2006-2014 I rev. 1014
Page 8/24



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