DFR0579

  Solar Power Manager Micro SKU: DFR0579 Solar Power Manager Series Introduction The DFRobot Solar Power Manager series are designed for IoT and renewable energy projects, providing safe and high-efficiency embedded solar power management modules for makers and application engineers. All modules in this series have MPPT (Maximum Power Point Tracking) to maximize solar energy conversion efficiency under various sunlight. A complete battery and power protection provide reliable power management for different types of solar projects. Selection Guide Name Solar Power Manager Solar Power Manager 5V Solar Power Manager Micro★ SKU DFR0535 DFR0559 DFR0579 Solar Power Management IC LTC3652 CN3065 SPV1050 Solar Input Voltage 7V ~ 30V 4.4V ~ 6V 0.5V ~ 4V Maximum Charge Current (Solar) 2A 900mA 70mA Topology DC-DC Buck Linear Regulator DC-DC Boost Battery 3.7V Lithium Battery 3.7V Lithium Battery 3.7V Lithium Battery MPPT Yes (9V/12V/18V Optional) Yes（Fixed 5V） 75% Open Voltage Battery Protections Over Charge/Over Discharge/Over Current/Reverse Connection Protections Over Charge/Reverse Connection Protections Over Charge/Over Discharge/Reverse Connection Protections Output Protections Short Circuit/Over Current/Over Heat Protections Short Circuit/Over Current Protections Short Circuit/Over Current Protections USB Charge IN Yes Yes Yes USB OUT 5V 1.5A 5V 1A No Regulated OUT Three Regulated Outputs 3.3V 1A；5V 1.5V； 9V/12V 0.5A One Regulated Output 5V 1A One Regulated Output 3.3V 90mA Dimension 78.0mm×68.0mm 33.0mm×63.0mm A complete multifunction A small and easy-to-use solar power management 5V solar power module. management module. Features 30.0mm×30.0mm A micro power solar power management module for lowpower sensors and controllers. Applications: Small Solar Applications: Solar Power Applications: Wireless Sensor Street Lamp, Solar Bank, Solar Environment Network, BLE iBecon Powered Robots Monitors For 1V/2V/3V Solar Panels For 9V/12V/18V Solar For 5V Solar Panels within 0.5W Panels within 20W within 10W Introduction Solar Power Manager Micro is a micro power, high-efficiency solar power management module, designed for powering IoT based low-power wireless sensors or controllers with 1V~3V small size solar panels. Benefited from its extremely low power dissipation and MPPT (maximum power point tracking), the module is able to maximize the conversion efficiency of solar energy under weak sunlight. These features make low-power wireless devices charge-free and battery replacement-free possible by pure solar power. The module employs a constant voltage ratio MPPT (Maximum Power Point Tracking) algorithm to maximize the output power of the solar panel under various sunlight. It can charge a 3.7V lipo battery through solar or USB, providing charge current up to 70mA or 100mA respectively. A 3.3V 90mA regulated output can handle burst current of most low-power wireless devices during transmitting or receiving. In low-power solar projects, lipo battery may suffer from the over-discharge problem when it is cloudy for days, or the capacity of the battery cannot meet the device’s need. The battery over-charge and over-discharge protections are designed to prevent such problems to extend battery life. Features     Constant voltage ratio MPPT algorithm, maximizing solar energy conversion Designed for 1V ~ 3V low voltage small solar panels, ultra low power design Solar/USB two charging methods Multiple protections extending battery life Specifications Micro Solar Power Management Module              Solar Power Management IC: SPV1050 Solar Input Voltage (SOLAR IN): 0.5V~4V Battery Input (BAT IN): 3.7V Lithium Battery Charge Current: 37mA@USB IN; 70mA@SOLAR IN Over-charge Protection Threshold: 4.2V Over-discharge Protection Threshold: 3.1V Regulated Power Supply: 3.3V 90mA @ BAT IN 3.7V Operating Current: