型號(hào)：MP4021GS-LF-Z
廠家：MPS（美國(guó)芯源）
封裝：SOP-8
批號(hào)：12+
應(yīng)用領(lǐng)域：LED照明


MP4021GS是一個(gè)Primary Side Control Offline LED Controller with Active PFC，采用SOP-8的引腳封裝

其具體的規(guī)格如下：


MP4021GS,30W以下隔離方案，全電壓輸入，電流波動(dòng)1.5%以內(nèi), 260V時(shí)PF為0.95，效率在80%以上！

MPS4020/21 優(yōu)勢(shì)在于：
1.集成PFC,功率因數(shù)很高，大部分情況下在93%以上，最高可達(dá)98%

2.源邊控制，省去光耦和相關(guān)電路，降低BOM cost


3.獨(dú)特的MOSFET控制技術(shù)，對(duì)MOSFET和快恢復(fù)二極管的要求降低很多，對(duì)少的方案必須選擇昂貴的MOSFET和二極管，進(jìn)一步降低BOM COST

4.支持傳統(tǒng)的調(diào)光模式（原因是采用了獨(dú)特的MOSFET控制技術(shù)）。

總結(jié): 隔離電源方案，效率85%、全電壓輸入，260V時(shí)PFC0.95、精度1.5%以內(nèi)。MP4021是專門一顆針對(duì)LED驅(qū)動(dòng)的芯片，功能全很多。單是PFC已經(jīng)是很大的優(yōu)勢(shì)，客戶會(huì)很看重這點(diǎn)，以及第二點(diǎn)的輸出過(guò)壓檢測(cè)（就是可以做開(kāi)路保護(hù)）。



Description:
The MP4021 is a primary-side-control offline LED lighting controller that achieves high power factor and accurate LED current for single-power stage, isolated lighting applications. The proprietary real current control method accurately controls the LED current from the primary side , and therefore significantly simplifies the LED lighting system design by eliminating the secondary side feedback components and the optocoupler.

The MP4021 integrates power factor correction and works in boundary conduction mode to reduce the MOSFET switching losses.




The extremely low start-up current and quiescent current reduces the total power consumption to provide a high efficiency solution for lighting applications.
The multi-protection features of MP4021 significantly improves greatly enhance the system reliability and safety. The MP4021 features over-voltage protection, short-circuit protection, cycle-by-cycle current limit, VCC UVLO and auto-restart over-temperature protection.



Features
Real Current Control Without Secondary-feedback Circuit
Unique Architecture for Superior Line Regulation
High Power Factor: ≥0.9 Over Universal Input Voltage
Boundary Conduction Mode Improves Efficiency
Ultra-low (10A) Start Up Current
Low (1mA) Quiescent Current
Input UVLO
Cycle-by-cycle Current Limit
Over-voltage Protection
Short-circuit Protection
Over-temperature Protection
Available in an SOIC8 Package