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(qū)動(dòng)器采用IRS2540
文件頁數(shù)： 2/28頁
文件大?。?/td> 839K
代理商： IRS2540
2
RD-0608
www.irf.com
1.
Introduction
As the industry becomes more power conscious to compensate for increasing energy costs and to meet
governmental regulations, new innovative ways of conserving energy are being developed. For the
lighting industry one of these outlets has been LEDs. Due to their longevity, robust design, low
maintenance and high efficiency, they have proven to be a viable alternative to less efficient light
sources. With their long term projected falling cost and further increased efficiency, the industry has
eagerly embraced LEDs and put them in high demand. LEDs require drivers that have specific
features such as constant current control over the temperature and manufacturing variations of LEDs,
dimming, and appropriate fault protections. The IRS254(0,1) is specifically designed to address these
requirements
The IRPLLED1 evaluation board is a high voltage LED driver designed to operate on an input DC
voltage of 40 V to 170 V and supply a programmable load current of 350 mA, 700 mA, 1 A, or 1.5 A.
The output voltage is also clamped at 30 V by the external open-circuit-protection circuitry, which can
easily be disabled or reconfigure as explained in this reference design. However the output voltage
should not exceed the ratings of the external components mounted on the board; higher voltage when
optimized components are utilized in the design. IRPLLED1 uses the IRS254(0,1), a high voltage, high
frequency buck control IC for constant LED current regulation. The IRS254(0,1) controls the average
load current by a continuous mode time-delayed hysteretic method using an accurate on chip band gap
voltage reference. The 8-pin, 200 V (600 V) rated IRS2540 (IRS2541) inherently provides short-circuit
protection, with open-circuit protection incorporated by a simple external circuit and has full dimming
capabilities. The IRS254(0,1) allows scalable designs to accommodate series and parallel
configurations of LEDs, for today’s production LEDs as well as new generation higher current LEDs,
and provides high current control accuracy over input and output voltage.
The evaluation board documentation will briefly describe the functionality of IRS254(0,1), discuss the
selection of the output stage, of the switching components, and of the surrounding circuitry. This board
was tested with a single Lumileds flood board for the 350 mA and 700 mA settings, and two
Lumileds flood boards in parallel for the 1 A and 1.5 A settings. Lumileds flood boards are available
through Future Electronics and have a max nominal current rating of 700 mA with a breakdown
voltage between 16 V and 24 V. This demo board can operate off of a 120 V AC rectified line with
the addition of a proper rectifying circuit.
相關(guān)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(guān)代理商/技術(shù)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(qū)動(dòng)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(fēng)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(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
IRS25401STRPBF 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
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