參數(shù)資料
型號(hào): NCP5604B
廠商: ON SEMICONDUCTOR
英文描述: High Efficiency White LED Driver(高效白色LED驅(qū)動(dòng)器)
中文描述: 高效率白光LED驅(qū)動(dòng)器(高效白色發(fā)光二極管驅(qū)動(dòng)器)
文件頁(yè)數(shù): 12/15頁(yè)
文件大?。?/td> 359K
代理商: NCP5604B
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)
E
P
(
I
out
=20 mA
I
out
=40 mA
I
out
=60 mA
I
out
=80 mA
I
out
=100 mA
Figure 18. Typical Efficiency
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