NCP5030:Buck-Boost Converter to Drive a Single LED from 1 Li-Ion or 3 Alkaline Batteries
The NCP5030 is a fixed frequency PWM buck-boost converter optimized for constant current applications such as driving high-powered white LED. The buck-boost is implemented in an H-bridge topology and has an adaptive architecture where it operates in one of three modes: boost, buck-boost, or buck depending on the input and output voltage condition. This device has been designed with high-efficiency for use in portable applications and is capable of driving in DC up to 900 mA into a high power LED for flashlight / torch applications. To protect the device cycle-by-cycle current limiting and a thermal shutdown circuit have been incorporated as well as output over-voltage protection. The 700 kHz switching frequency allows the use of a low value 4.7 µH and ceramic capacitors.
技术特性
- Efficiency: 87% at 500 mA and 3.3 V VIN
- Internal Synchronous Rectifier, No Schottky Diodes
- Adjustable Switching Limit Current to Optimize inductor size
- 0.3 µA Shut-down Control with True-Cut off
- Input Voltage Range from 2.7 V to 5.5 V
- 200 mV Feedback Voltage
- Output Over-voltage and Thermal Shut Down Protection
应用
- LED Drive from Alkaline Batteries
终端产品
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封装图 PACKAGE DIMENSIONS
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订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP5030MTTXG |
Active |
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Buck-Boost Converter to Drive a Single LED from 1 Li-Ion or 3 Alkaline Batteries, NCP5030Q8A6MN |
QFN-20 |
485E-01 |
1 |
Tube |
3000 |
$1.1333 |
数据资料DataSheet下载
