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Zetex Semiconductors - ZXSC310 High power torch reference design

Numéro de référence DN68
Description ZXSC310 High power torch reference design
Fabricant Zetex Semiconductors 
Logo Zetex Semiconductors 





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DN68
ZXSC310 High power torch reference design
Description
This design note shows a typical ZXSC310 LED driver circuit for a high powered LED torch. The
input voltage ranges from 0.7V to 1.6V with a maximum output current of 335mA at 1.4V input.
A typical schematic diagram is shown in Figure 1.
VIN
C1
L1
U1
Vcc
Vdrive
Stdn
Isense
Gnd
ZXSC310
D1
Q1
R1
C2 C3
Figure 1 Schematic diagram
Reference Value Part number Manufacturer Contact details Comments
U1
ZXSC310E5
Zetex
www.zetex.com LED driver in SOT23-5
Q1
FMMT617
Zetex
www.zetex.com Low sat. NPN in SOT23
D1
2A ZHCS2000
Zetex
www.zetex.com 2A Schottky in SOT23
L1
7.5H DO3316P-153x2 Coilcraft
www.coilcraft.com ISAT = 3A
R1 19.5mGeneric
Generic
NA
0805 size
C1 1F Generic
Generic
NA
C2 220F Generic
Generic
NA
C3 100F Generic
Generic
NA
Table 1 Bill of materials
Issue 2 - July 2006
© Zetex Semiconductors plc 2006
1
www.zetex.com

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