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NCP5604B Datenblatt(Datasheet) 12 Page - ON Semiconductor

Teile-Nr. NCP5604B
Beschreibung  High Efficiency White LED Driver
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Hersteller  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP5604A, NCP5604B
http://onsemi.com
12
Figure 15. Startup Operation
SHORT CIRCUIT OPERATION
The circuit is designed to support a short circuit across
Vout and Ground without damage. When a short occurs, the
pulsed output current increases to the maximum peak value
until the output voltage drops below 1 V. At this point, the
pulsed current is limited to 40 mA average (typical), until
the short is removed. The waveforms given in Figure 16
illustrate the functional operation. Similarly, the input
current is limited 300 mA peak (typical) as depicted in
Figure 17.
Figure 16. Output Short Circuit Operation
Figure 17. Input Current Short Circuit Operation
50
55
60
65
70
75
80
85
90
3.2
3.4
3.6
3.8
4.0
4.2
Vbat(V)
Iout=20 mA
Iout=40 mA
Iout=60 mA
Iout=80 mA
Iout=100 mA
Figure 18. Typical Efficiency




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