MaximMAX16841最大化效率离线LED驱动解决方案
- 格式：doc
- 大小：2.70 KB
- 文档页数：1
MaximMAX16841最大化效率离线LED驱动解决方案
LEDLEDLED驱动器，并提供有源功率因素修正（PFC），既可用于隔离（如反激）和非隔离（如
降压）配置。MAX16841采用恒定频率控制技术以得到最大化的效率，通用输入电压90V 到
264V AC，主要用在带TRIAC调光的LED灯，通用输入LED灯，工业和商业照明，住宅区LED
照明等。本文介绍了MAX16841主要特性，方框图，非隔离（降压）和反激拓扑图，以及反激
和降压与降压-升压LED驱动器电路图。Offline LED Driver Provides Smooth Dimming and
Maximizes EfficiencyThe MAX16841 is an LED driver for AC line (100V, 120V, 220V, and
230V AC) input lamps. It features proprietary control of the input current that allows
lamps to dim smoothly from full to zero light intensity, while providing active power
factor correction (PFC). It is a very flexible product that can be used in isolated
(e.g., flyback) and nonisolated (e.g., buck) configurations. The conventional use
of an optocoupler in isolated configurations can be avoided in MAX16841-based
designs.The constant frequency-control technique of the device allows maximization
of the conversion efficiency at both low and high AC line by operating at the
conduction mode that minimizes total conduction and switching losses.The device can
be configured for universal input (90V to 264V AC) dimmable applications, allowing
the design of an LED lamp that can be operated and dimmed worldwide.This device can
be used without electrolytic capacitors, thus maximizing the lamp lifetime. In this
case, the LED current is a rectified sinusoid with a frequency that is twice the AC
line frequency.The device also features thermal shutdown, current limit, open LED
protection, and VCC undervoltage lockout. The MAX16841 is available in an 8-pin SO
package and operates over the -40NC to +125NC temperature range.MAX16841主要特性：
Smooth Dimming with Leading-Edge (Triac) and Trailing-Edge DimmersActive Power
Factor CorrectionNonisolated (e.g., Buck) and Isolated (e.g., Flyback)
TopologiesUniversal 90V to 264V AC Input RangeConstant Frequency-Control Scheme
Maximizes Efficiency at High and Low AC Line VoltageConstant Power Control with No
Need for OptocouplersVery-Low Quiescent CurrentOutput Open and Short
ProtectionThermal ShutdownAvailable in an 8-Pin SO PackageMAX16841应用：Retrofit
LED Lamps with Triac DimmingUniversal Input LED Retrofit LampsIndustrial and
Commercial LightingResidential LED Lighting图1。MAX16841方框图图2。MAX16841非
隔离（降压）拓扑图图3。MAX16841反激配置图图4。MAX16841反激LED驱动器图5。MAX16841
降压LED驱动器图6。MAX16841降压-升压LED驱动器详情请见：/en/ds/MAX16841.pdf
