DN79 ZXSC400 1W LED driver Neil Wolstenholme, Applications Engineer, Zetex Semiconductors plc Description ZXSC400 is configured to the reference design below.
The target application is a 1W white LED driven from a two cell NiCd/NiMH or alkaline battery input for flashlights and high powered LED driving.
The supply voltage for ZXSC400 reference design is: VIN = 1.
8V ~ 3V.
L1 22uH VIN D1 ZHCS1000 C1 100uF/6V3 U1 ZXSC400 VCC VDRIVE STDN ISENSE GND VFB Q1 FMMT617 C2 100uF/6V3 LED1 LXHL-PW01 R1 22mohm R2 0.
82ohm GND Figure 1 Schematic diagram Ref.
Value Package Part number Manufacturer Contact details Notes U1 N/A SOT23-6 ZXSC400E6 Zetex www.
zetex.
com Boost converter Q1 N/...

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