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參數(shù)資料
| 型號： | IRS2540 |
| 廠商： | International Rectifier |
| 英文描述： | IRPLLED1 High Voltage LED Driver using the IRS2540 |
| 中文描述： | IRPLLED1高電壓LED驅動器采用IRS2540 |
| 文件頁數(shù)： | 6/28頁 |
| 文件大?。?/td> | 839K |
| 代理商： | IRS2540 |
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6
RD-0608
www.irf.com
0
200
400
600
800
1000
1200
1400
1600
30
80
130
180
V
IN
(V)
I
O
350mA
1A
700mA
1.5A
Fig. 5: V
out
= 16 V, L
1
= 470 μH, C
OUT
= 33 μF
0
200
400
600
800
1000
1200
1400
1600
10
15
20
25
30
V
OUT
(V)
I
O
350mA
700mA
1A
1.5A
Fig. 6: V
bus
= 100 V, L
1
= 470 μH, C
OUT
= 33 μF
3.
Frequency selection
The frequency in the IRS254(0,1) is free running and maintains current regulation by quickly adapting
to changes in input and output voltages. There is no need for additional external components to set the
frequency as seen with most oscillators, resulting in a part reduction. The frequency is determined by
L
1
and C
OUT
, as well as the input/output voltages and load current. The selection of the frequency will
be a trade-off between system efficiency, current control regulation, size, and cost.
The higher the frequency, the smaller and lower the cost of L
1
and C
OUT
, the higher the ripple, the
higher the FET switching losses, which becomes the driving factor as V
BUS
increases to higher
voltages, the higher the component stresses and the harder it is to control the output current.
With an input voltage as high as 170 V, the targeted frequency was determined to be between 50 kHz
and 75 kHz. Within this operating spectrum all components can easily handle their associated power
losses.
±0.6%
±0.5%
±1.2%
±0.3%
±0.25%
±0.13%
±0.17%
±0.1%
相關PDF資料 |
PDF描述 |
|---|---|
| IRS4426 | DUAL LOW SIDE DRIVER |
| IRS4428SPBF | DUAL LOW SIDE DRIVER |
| IRS4426PBF | DUAL LOW SIDE DRIVER |
| IRS4426S | DUAL LOW SIDE DRIVER |
| IRS4426SPBF | DUAL LOW SIDE DRIVER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| IRS25401 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:LED BUCK REGULATOR CONTROL IC |
| IRS25401PBF | 功能描述:LED照明驅動器 Hysteretic Buck LED Drvr 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 |
| IRS25401PBF | 制造商:International Rectifier 功能描述:IC LED DRVR DIP8 |
| IRS25401SPBF | 功能描述:LED照明驅動器 200V HALF BRDG DRVR LED BUCK REGULATOR 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 |
| IRS25401STRPBF | 功能描述:LED照明驅動器 Hysteretic Buck LED Drvr 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 |
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