DFRobot Sunflower Solar Power Manager

DFRobot Sunflower Solar Power Manager is used for high-efficiency, small-power solar energy harvesting and managing low-power applications and IoT projects. The Sunflower is designed for a 5V solar panel and features an MPPT (Maximum Power Point Tracking) function. This maximizes the efficiency of the solar panel. The module can provide up to 900mA charging current to 3.7V Li battery with USB charger apart from serving as a solar charger. The ON/OFF controllable DC-DC converters with 5V 1A output satisfy the needs of various solar power projects and low-power applications. The module also employs various protection functions, like battery/solar panel reverse connection protection, output over temperature, and current/short circuit protection, which greatly improves the stability and safety of the system.

Features

Constant Voltage MPPT Algorithm, Maximizing Solar Panel Efficiency
Designed for 5V Solar Panel
Double Charging Mode: Solar/USB Charger (900mA Max Charge Current)

5V ON/OFF Controllable Regulated Power Supply for Low-Power Applications
Various Protection Functions
USB Connector with ESD Shell

Specifications

Solar Power Management IC: CN3065
Solar Input Voltage (SOLAR IN): 4.5V~6V
Battery Input (BAT IN): 3.7V Li-Polymer/Li-ion Battery
Charge Current (USB/SOLAR IN): 900mA Max Trickle Charging, Constant Current, Constant Voltage Three Phases Charging
Charge Cutoff Voltage (USB/SOLAR IN): 4.2V±1%
USB IN Voltage: 5V
Regulated Power Supply: 5V 1A
Regulated Power Supply Efficiency (3.7V Battery IN)
- 5V/USB OUT: 89%@10%Load, 86%@50%Load, 83%@90%Load

USB/Solar Charge Efficiency: 73%@3.7V 900mA BAT IN
Maximum Quiescent Current:
Protection Functions
- BAT IN: Over Charge/Reverse Connection Protection
- 5V/USB OUT: Short Circuit/Over Current/Over Heat Protection
- SOLAR IN: Reverse Connection Protection
Operation Temperature: -40℃～85℃
Dimension: 33.0x63.0mm