ncp5604 ON Semiconductor, ncp5604 Datasheet - Page 12
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ncp5604
Manufacturer Part Number
ncp5604
Description
Current Mode Charge Pump Led Driver
Manufacturer
ON Semiconductor
Datasheet
1.NCP5604.pdf
(15 pages)
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SHORT CIRCUIT OPERATION
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.
The circuit is designed to support a short circuit across
Figure 16. Output Short Circuit Operation
Figure 15. Startup Operation
NCP5604A, NCP5604B
http://onsemi.com
12
I
out
90
85
80
75
70
65
60
55
50
Figure 17. Input Current Short Circuit Operation
=100 mA
4.2
Figure 18. Typical Efficiency
I
4.0
out
=80 mA
3.8
I
out
=60 mA
Vbat(V)
3.6
I
out
=40 mA
3.4
I
out
=20 mA
3.2