[原创] ADI LTC7852－1双输出多相电流模式同步控制方案

ADI公司的LTCR7852/LTC7852-1是6相双输出电流模式同步降压开关稳压器控制器,和外接功率器件如DrMOS,功率区块或分立N沟MOSFET和相关的栅极驱动器.它可以进行1-,2-,3-,4-,5-和6相配置.采用两个IC并联可配置成8-,10和12相,以得到高达400A电流.亚毫欧姆DCR检测或DrMOS电流检测改善了效率,总输出电压精度±0.5%,具有灵活的相位配置和双输出电流监视,双差分遥测放大器,可编频率范围从250kHz到1.2MHz,VIN范围不受IC所限,VCC范围4.5V-5.5V,VOUT范围从0.5V到2.0V.主要用在计算机系统,通信和数据系统以及DC电源分布系统.本文介绍了LTC7852-1主要特性,功能框图,典型应用电路和多种应用电路,以及演示板DC2631A主要特性,框图,测试建立图,以及电路图,材料清单和PCB设计图.

The LTCR7852/LTC7852-1 is a six-phase, dual outputcurrent mode synchronous step-down switching regulatorcontroller that works in conjunction with externalpower train devices such as DrMOS, power blocks ordiscrete N-channel MOSFETs and associated gate drivers.

Its flexible design enables 1-, 2-, 3-, 4-, 5-, and 6-phaseconfigurations. The LTC7852 offers a unique feature thatenhances the signal-to-noise ratio of the current sensesignal, allowing the use of inductors with very low DCwinding resistances for maximum efficiency. The controllerachieves a minimum on-time of just 40ns, permitting theuse of high switching frequency at high step-down ratios.
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