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DN79 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - ZXSC400 1W LED driver - Zetex Semiconductors

भाग संख्या DN79
समारोह ZXSC400 1W LED driver
मैन्युफैक्चरर्स Zetex Semiconductors 
लोगो Zetex Semiconductors लोगो 
पूर्व दर्शन
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<?=DN79?> डेटा पत्रक पीडीएफ

DN79 pdf
DN79
Performance
Increasing efficiency
On ZXSC400 reference design, R1 is set to 22mto ensure that the LED current is regulated over
the full input voltage range of 3V ~ 1.8V. For improved efficiency R1 can be changed to a 33m
resistor but LED current will not be regulated below 2V. See Figure 2, Performance graphs.
100
90
V =V
STDN IN
I =350mA
LED
80
R1=33mohms
70 R1=22mohms
60
50
3.0 2.8 2.6 2.4 2.2 2.0 1.8
Input voltage (V)
Efficiency vs Input Voltage
400
380
V =V
STDN IN
360
R1=22mohms
340
R1=33mohms
320
300
3.0 2.8 2.6 2.4 2.2 2.0 1.8
Input Voltage (V)
LED Current vs Input Voltage
1000
V =V
STDN IN
800 R1=22mohms
600 R1=33mohms
4.0
V =V
STDN IN
3.8
3.6
R1=33mohms
3.4
R1=22mohms
3.2
400
3.0 2.8 2.6 2.4 2.2 2.0 1.8
Input Voltage (V)
Input Current vs Input Voltage
3.0
3.0 2.8 2.6 2.4 2.2 2.0 1.8
Input Voltage (V)
LED Voltage vs Input Voltage
Figure 2 Performance graphs
Europe
Zetex GmbH
Streitfeldstraße 19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Americas
Zetex Inc
700 Veterans Memorial Highway
Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
Asia Pacific
Zetex (Asia Ltd)
3701-04 Metroplaza Tower 1
Hing Fong Road, Kwai Fong
Hong Kong
Corporate Headquarters
Zetex Semiconductors plc
Zetex Technology Park, Chadderton
Oldham, OL9 9LL
United Kingdom
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
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 1 - May 2005
© Zetex Semiconductors plc 2005

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डाउनलोड[ DN79 Datasheet.PDF ]


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