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DN85

Part Number	DN85
Manufacturer	Zetex Semiconductors
Description	ZXSC400 1W/3W buck LED drivers
Published	Aug 18, 2014
Detailed Description	DN85 ZXSC400 1W/3W buck LED drivers Ray Liu, Applications Engineer, Zetex Semiconductors Description In Figure 1, ZXSC4...
Datasheet	DN85 PDF File

Overview

DN85 ZXSC400 1W/3W buck LED drivers Ray Liu, Applications Engineer, Zetex Semiconductors Description In Figure 1, ZXSC400 is configured as a high efficiency buck LED driver.
The target applications are either 1W (350mA) or 3W (700mA) drivers for white LED driven from a 4 cell battery, or a 2 alkaline cell input for flashlights.
The supply voltage for ZXSC400 reference design is: VIN = 3.
8V to 6V.
Parts lists for 1W and 3W design are shown in Table 1 and Table 2 respectively.
Performance data is measured based on two different LED's VF binning with 0.
3V VF difference.
C3 VIN = 4V to 6V L1 D1 C2 U1 VCC Stdn VDRIVE VFB ISENSE Q1 R3 R2 C1 GND ZXSC400 R1 Figure 1 Schematic diagram Issue...

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