### LTC3105 LTC3105 looks most promising right now. It's also designed for power conversion of single cells or PV cells with low voltages. Includes MPPC and Burst Mode. About $4 on Mouser, per Octopart https://octopart.com/ltc3105edd%23pbf-analog+devices-88318833 https://www.mouser.com/c/?q=584-LTC3105EDD#PBF&sn=Analog+Devices+Inc.&utm_source=octopart&utm_medium=aggregator&utm_campaign=584-LTC3105EDD%23PBF&utm_content=Analog+Devices+Inc.&exact=true - PBF - Lead Free - TRPBF - Tape Reel, Lead Free #### Typical Configuration ![[Pasted image 20250120045053.png]] #### Internal Schematic ![[Pasted image 20250120045944.png]] #### PV Trickle Charging Schematic ![[Pasted image 20250120054305.png]] #### Explanation of User Programmable MPPC and Burst Mode Operation ##### User Programmable MPPC (Maximum Power Point Control) - **Concept:** Maximum Power Point Control (MPPC) refers to the technique of adjusting the operating point of a power source (e.g., solar panels or energy harvesting systems) to achieve the maximum possible power output. - **User Programmable:** This means the user can set or adjust the MPPC set point to optimize energy extraction based on specific conditions or power source characteristics. - **Advantage:** By allowing user programmability, you can tailor the MPPC set point to dynamically adjust to changing environmental conditions or source qualities, maximizing the energy harvested from the source. ##### Burst Mode Operation - **Description:** Burst Mode operation is a technique used in power converters to enhance efficiency, particularly at light load conditions. It involves periodically turning the power stage on and off to maintain the output voltage with minimal power consumption. - **Self-Adjusting Peak Current:** The proprietary feature means the converter can adjust the peak inductor current automatically during Burst Mode, optimizing the efficiency and minimizing output voltage ripple. - **Benefits:** - **Increased Efficiency:** Particularly effective in low-power applications or when the converter isn't fully loaded, reducing losses and improving standby efficiency. - **Reduced Ripple:** The adjusting peak current helps maintain stability and minimize variations in the output voltage, resulting in smoother operation. Together, MPPC and Burst Mode provide robust tools for optimizing energy harvesting systems, ensuring that converters operate effectively under a wide range of conditions and loads. These features are particularly beneficial in applications where varying input conditions require adaptive power management strategies.