Cypress MB39C831太阳能收获超低电压升压管理方案

Cypress公司的MB39C831是高效率同步整流升压DC/DC转换器,包括控制DC/DC转换器输出跟随太阳能电池的MPPT和锂电池安全充电的保护功能,输入电压0.3V 到 4.75V,输出电压调整范围3.0V到5.0V,无负载时的静态电流41μA,主要用在太阳能收获,热能收获,手持音频播放器,手机,电子书,电子词典,无线遥控控制器和传感器节点.本文介绍了MB39C831主要特性,框图,恒压模式和充电模式应用电路,以及评估板MB39C831-EVB-03主要指标,框图,电路图,材料清单和PCB设计图.
The MB39C831 is the high-efficiency synchronous rectification boost DC/DC converter IC which efficiently supplies energy getting from the solar cell with the single cell or multiple cells, or from the thermoelectric generator (TEG) to the Li-ion battery.
It contains the function to control the DC/DC converter output following the maximum power point of the solar cell (MPPT: Maximum Power Point Tracking) and the protection function to charge the Li-ion battery safely.
It is possible to start-up from 0.35 V using the low-voltage process and adapts the applications which the single cell solar cell is treated as the input.
MB39C831主要特性:
Operation input voltage range : 0.3V to 4.75V
Output voltage adjustment range : 3.0V to 5.0V
Minimum input voltage at start-up : 0.35V
Quiescent Current (No load) : 41 μA
Input peak current limit : 200 mA
Built-in MPPT
Charge voltage to the Li-ion battery/current protection function built in
Improvement of the efficiency during the low-output power according to the auto PFM/PWM switching mode
MB39C831应用:

Solar energy harvesting
Thermal energy harvesting
Li-ion battery using the single cell or multiple cells’ solar cell/Super Capacitor Charger
Portable audio players
Cellular phone
eBook
Electronic dictionary
Wireless remote controllers
Sensor node

图1.MB39C831框图

图2.MB39C831恒压模式应用电路:MPPT_ENA = L, ENA = H

图3.MB39C831充电模式应用电路:MPPT_ENA = H, ENA = H
应用电路元件列表:<...