NS LM3152 12A开关电源控制方案

NS公司的LM3151/2/3 是SIMPLE SWITCHER ®控制器,能为降压稳压器提供高达12A的输出电流,输入电压从6V到42V,输出电压3.3V,开关频率250 kHz, 500 kHz和750 kHz,不需要回路补偿.可用于高性能DSP,FPGA,ASIC和微处理器,宽带,网络和光纤通信基础设备,路由器,安全监视和电源模块.本文介绍了LM3151/2/3的主要特性, 方框图以及演示板电路图和演示板材料清单(BOM).
The LM3151/2/3 SIMPLE SWITCHER ® Controller is an easy to use and simplified step down power controller capable of providing up to 12A of output current in a typical application. Operating with an input voltage range of 6V-42V, the LM3151/2/3 features a fixed output voltage of 3.3V, and features switching frequencies of 250 kHz, 500 kHz, and 750 kHz. The synchronous architecture provides for highly efficient designs. The LM3151/2/3 controller employs a Constant On-Time (COT) architecture with a proprietary Emulated Ripple Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple. The Constant On-Time (COT) regulation architecture allows for fast transient response and requires no loop compensation, which reduces external component count and reduces design complexity.
Fault protection features such as thermal shutdown, under-voltage lockout, over-voltage protection, short-circuit protection, current limit, and output voltage pre-bias startup allow for a reliable and robust solution.
The LM3151/2/3 SIMPLE SWITCHER  concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH  online design tool. WEBENCH  provides design support for every step of the design process and includes features such as external component calculation with a new MOSFET selector, electrical simulation, thermal simulation, and Build-It boards for prototyping
主要特性:
PowerWise  step-down controller
6V to 42V Wide input voltage range
Fixed output voltage of 3.3V
Fixe...