针对现有太阳能最大功率点跟踪控制策略的不足，提出了一种新型的最大功率点跟踪控制策略，即基于电流单参量的最大功率点跟踪(MPPT)。首先阐述了该最大功率控制策略的基本原理与可行性，并重点描述了该最大功率点跟踪控制策略的系统设计与调试，其中侧重于系统核心设计：电流监控电路设计和基于纯CMOS数字电路硬件逻辑程序的步进PWM控制器设计，并且详细分析了其工作原理及元器件的选取。经调试与完善，该MPPT控制系统现已能实现最大功率点跟踪，同时显示出它区别于其他控制策略的优势。

For the deficiencies of current methods for maximum power point tracking(MPPT) of solar cells, a new strategy, only-current-based MPPT system, was put forward. The basic principles and the feasibility of the only-current-based MPPT strategy were elaborated, and the design and debugging of the controlling system, especially the current monitoring circuit design and step-by-step PWM controller based on CMOS digital circuit hardware logical programming were introduced in detail. Debuggings and improvements ensure the MPPT controlling system to achieve maximum power point tracking as well as show its advantages compared with other MPPT strategies.