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參數(shù)資料
| 型號： | NCP5005 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Compact Backlight LED Boost Driver(背光LED升壓驅動器) |
| 中文描述： | 緊湊型背光LED升壓驅動器（背光的LED升壓驅動器） |
| 文件頁數(shù)： | 9/23頁 |
| 文件大?。?/td> | 239K |
| 代理商： | NCP5005 |
NCP5005
http://onsemi.com
9
Output Load Drive
In order to optimize the builtin Boost capabilities, one
shall operate the NCP5005 in the continuous output current
mode. Such a mode is achieved by using and external
reservoir capacitor (see Table 1) across the LED.
At this point, the peak current flowing into the LED
diodes shall be within the maximum ratings specified for
these devices. Of course, pulsed operation can be achieved,
due to the EN signal Pin 4, to force high current into the
LED when necessary.
The Schottky diode D1, associated with capacitor C2
(see Figure 9), provides a rectification and filtering
function.
When a pulseoperating mode is acceptable:
A PWM mode control can be used to adjust the output
current range by means of a resistor and a capacitor
connected across FB pin. On the other hand, the
Schottky diode can be removed and replaced by at
least one LED diode, keeping in mind such LED shall
sustain the large pulsed peak current during the
operation.
TYPICAL OPERATING CHARACTERISTICS
0
2.50
10
20
30
40
50
60
70
80
90
100
3.00
3.50
4.00
V
bat
(V)
4.50
5.00
5.50
Y
5 LED/10 mA
3 LED/10 mA
4 LED/10 mA
2 LED/10 mA
0
2.50
10
20
30
40
50
60
70
80
90
100
3.00
3.50
4.00
V
bat
(V)
4.50
5.00
5.50
Y
5 LED/4 mA
3 LED/4 mA
4 LED/4 mA
2 LED/4 mA
Figure 10. Overall Efficiency vs. Power Supply @
I
out
= 4.0 mA, L = 22 H
Figure 11. Overall Efficiency vs. Power Supply @
I
out
= 10 mA, L = 22 H
0
2.50
10
20
30
40
50
60
70
80
90
100
3.00
3.50
4.00
Vbat (V)
4.50
5.00
5.50
Y
5 LED/20 mA
3 LED/20 mA
4 LED/20 mA
2 LED/20 mA
0
2.50
10
20
30
40
50
60
70
80
90
100
3.00
3.50
4.00
Vbat (V)
4.50
5.00
5.50
Y
5 LED/15 mA
3 LED/15 mA
4 LED/15 mA
2 LED/15 mA
Figure 12. Overall Efficiency vs. Power Supply @
I
out
= 15 mA, L = 22 H
Figure 13. Overall Efficiency vs. Power Supply @
I
out
= 20 mA, L = 22 H
Yield = f(V
bat
) @ I
out
= 4.0 mA/L
out
= 22 H
Yield = f(V
bat
) @ I
out
= 10 mA/L
out
= 22 H
Yield = f(V
bat
) @ I
out
= 15 mA/L
out
= 22 H
Yield = f(V
bat
) @ I
out
= 20 mA/L
out
= 22 H
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| NCP5005GEVB | 功能描述:電源管理IC開發(fā)工具 NCP5005 EVAL BRD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| NCP5005SNT1G | 功能描述:LED照明驅動器 ANA WHITE LED DRIVER RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| NCP5006 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators |
| NCP5006_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Compact Backlight LED Boost Driver |
| NCP5006EVB | 功能描述:LED 照明開發(fā)工具 ANA WHITE LED DRIVER EVB RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
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