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    • 9. 发明授权
    • Minimum energy point tracking buck converter
    • 最小能量点跟踪降压转换器
    • US08866462B2
    • 2014-10-21
    • US13637230
    • 2011-02-28
    • Ping LuoShaowei ZhenXiang GengYe ZhangYajuan HeBo Zhang
    • Ping LuoShaowei ZhenXiang GengYe ZhangYajuan HeBo Zhang
    • H02M3/157H02M3/158H02M1/00
    • H02M3/157H02M3/158H02M2001/0025
    • This invention involves with a low power IC (Integrated Circuit) with high energy efficiency. This invention describes a Buck converter that can track the minimum energy point of the load. It works by estimating input energy of every sensing period, taking advantage of energy consumption curve of IC in sub-threshold. Energy estimation is implemented with counting conducted pulses, while maintaining constant input energy of each pulse by regulating output voltage and ON time with digital control circuit. With digital control circuit, minimum energy point can be tracked with a lookup table stored inside. Most of this invention's control circuit is digital, with benefits of low power consumption and small chip area.
    • 本发明涉及具有高能量效率的低功率IC(集成电路)。 本发明描述了可以跟踪负载的最小能量点的降压转换器。 通过估计每个感测周期的输入能量,利用IC的能量消耗曲线在次阈值中起作用。 通过计数传导脉冲实现能量估计,同时通过使用数字控制电路调节输出电压和导通时间来保持每个脉冲的恒定输入能量。 使用数字控制电路,可以使用存储在其中的查找表来跟踪最小能量点。 本发明的大多数控制电路是数字式的,具有低功耗和小芯片面积的优点。