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參數(shù)資料
| 型號(hào)： | LM3557 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Step-Up Converter for White LED Applications |
| 中文描述： | 升壓轉(zhuǎn)換器的白色發(fā)光二極管應(yīng)用 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 642K |
| 代理商： | LM3557 |
LM3557
Step-Up Converter for White LED Applications
General Description
The LM3557 is a complete solution for white LED drive
applications. With minimal external component count, no DC
current leakage paths to ground, cycle-by-cycle current limit
protection, and output over-voltage protection circuitry, the
LM3557 offer superior performance and cost savings over
standard DC/DC boost component implementations.
The LM3557 switches at a fixed-frequency of 1.25 MHz,
which allows for the use of small external components. Also,
the LM3557 has a wide input voltage range to take advan-
tage of multi-cell input applications. With small external com-
ponents, high fixed frequency operation, and wide input
voltage range, the LM3557 is the most optimal choice for
LED lighting applications.
Features
n
V
IN
Range: 2.7V–7.5V
n
Small External Components
n
1.25 MHz Constant-Switching Frequency
n
Output Over-Voltage Protection
n
Input Under-Voltage Protection
n
Cycle-By-Cycle Current Limit
n
TRUE SHUTDOWN: No DC current paths to ground
during shutdown
n
Low Profile Package:
<
1 mm Height -8 Pin LLP
n
No External Compensation
Applications
n
White LED Display Lighting
n
Cellular Phones
n
PDAs
Typical Application Circuit
20131601
FIGURE 1. Backlight Configuration
November 2004
L
2004 National Semiconductor Corporation
DS201316
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3570 | Low Noise White LED Driver System |
| LM3570SD | Low Noise White LED Driver System |
| LM3570SDX | Low Noise White LED Driver System |
| LM358 | Dual Operation Amplifiers |
| LM358CS | Voltage-Feedback Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3557SD-2 | 功能描述:LED照明驅(qū)動(dòng)器 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 |
| LM3557SD-2 | 制造商:Texas Instruments 功能描述:IC W LED DRIVER POWERWISE LLP-8 |
| LM3557SD-2/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 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 |
| LM3557SDX-2 | 功能描述:LED照明驅(qū)動(dòng)器 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 |
| LM3557SDX-2/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 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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