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PDF DN85 Data sheet ( Hoja de datos )
| Número de pieza | DN85 | |
| Descripción | ZXSC400 1W/3W buck LED drivers | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DN85 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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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
VDRIVE
Q1
Stdn
VFB
C1 GND ISENSE
ZXSC400
R3
R2
R1
Figure 1 Schematic diagram
Issue 1 - August 2007
© Zetex Semiconductors plc 2007
1
www.zetex.com
1 page  
DN85
Performance
100
90
80
70
60
50
6.4
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
6.4
VF~3.2
VF~3.5
6 5.6 5.2 4.8 4.4
Input Voltage (V)
Input Voltage vs Efficiency
4
VF~3.2
VF~3.5
6 5.6 5.2 4.8 4.4
Input Voltage (V)
Input Voltage vs Input Current
4
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
6.4
4
VF~3.2
VF~3.5
6 5.6 5.2 4.8 4.4
Input Voltage (V)
Input Voltage vs Output Current
4
3
2
1
0
6.4
VF~3.2
VF~3.5
6 5.6 5.2 4.8 4.4
Input Voltage (V)
Input Voltage vs Output Voltage
4
Figure 3 Performance graphs for 3W design
Issue 1 - August 2007
© Zetex Semiconductors plc 2007
5
www.zetex.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DN85.PDF ] | |
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