DN68

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.
D1
L1
VIN
U1
Q1
Vcc
Vdrive
C1
C2
Stdn
C3
Isense
Gnd
ZXSC310
Figure 1
R1
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
Zetex
www.zetex.com
2A Schottky in SOT23
D1
2A
ZHCS2000
L1
7.5␮H
DO3316P-153x2 Coilcraft
R1
19.5m⍀ Generic
Generic
NA
C1
1␮F
Generic
Generic
NA
C2
220␮F
Generic
Generic
NA
C3
100␮F
Generic
Generic
NA
Table 1
Issue 2 - July 2006
© Zetex Semiconductors plc 2006
www.coilcraft.com ISAT = 3A
0805 size
Bill of materials
1
www.zetex.com
DN68
Figure 2
Performance graphs
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Zetex Semiconductors plc
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Fax: (49) 89 45 49 49 49
[email protected]
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
[email protected]
Telephone: (852) 26100 611
Fax: (852) 24250 494
[email protected]
Telephone: (44) 161 622 4444
Fax: (44) 161 622 4446
[email protected]
For international sales offices visit www.zetex.com/offices
Zetex products are distributed worldwide. For details, see www.zetex.com/salesnetwork
This publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or
reproduced for any purpose or form part of any order or contact or be regarded as a representation relating to the products or services concerned.
The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.
www.zetex.com
2
Issue 2 - July 2006
© Zetex Semiconductors plc 2006
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