DFRobot is launching a brand new series - Sunflower, focusing on high-efficiency, small power solar energy management for IoT projects and renewable energy applications.
 

Solar Power Manager is a complete small power and high-efficiency solar power management module. It features as MPPT (Maximum Power Point Tracking) function, maximizing the efficiency of the solar panel. Apart from serving as a solar charger, the module can provide up to 2A charging current to 3.7V Li battery with AC adapter (within 30V) or USB charger, three individual ON/OFF controllable DC-DC converters with 5V 1.5A, 3.3V 1A and 9V/12V 0.5A outputs. These features satisfy the needs of various solar power projects and low-power applications. The module also employs various protect functions, such as Li battery protection, battery/solar panel reverse connection protection, output over temperature and over current/short circuit protection, which greatly improves the stability and safety of the system.

Board Overview
 

 

Connection Diagram
 

 

 

FEATURES

 

 

• Constant voltage MPPT algorithm, maximizing solar panel efficiency
• 7V~30V wide solar panel input voltage
• Various charging mode: solar/AC adapter/USB charger (2A max charge current)
• Three individual ON/OFF controllable regulated power supply for low-power applications
• All multi-layer ceramic capacitors (MLCC), safe, stable and high-efficiency
• Various protection functions
• USB connector with ESD shell

 

 

APPLICATIONS

 

 

• Smart solar environment monitor system
• Solar powered robot
• Small solar street lamp
• Solar power bank

 

 

SPECIFICATION

 

 

• Solar power management IC: LTC3652
• Solar input voltage (SOLAR IN): 7V~30V
• Battery input (BAT IN): 3.7V single cell Li-polymer/Li-ion battery
• Charge current(USB/SOLAR IN): 2A Max
• Charging cutoff voltage(USB/SOLAR IN): 4.2V±1%
• MPPT setting voltages：OFF/9V/12V/18V
• USB IN voltage: 5V
• Regulated power supply: OUT1=5V 1.5A; OUT2=3.3V 1A; OUT3=9V/12V 0.5A
• Regulated power supply efficiency (3.7V battery IN)
               OUT1: 86%@50%Load
               OUT2: 92%@50%Load
               OUT3 (9V OUT): 89%@50%Load
• USB charge efficiency: 84%@1A
• Solar charge efficiency (18V SOLAR IN)：78%@1A
• Maximum quiescent current: <3 mA
• Protections
               BAT IN: over charge /over discharge /over current /reverse connection protection
               OUT1-OUT3/USB OUT: short circuit/over current/over heat protection
               SOLAR IN: reverse connection protection
• Operation temperature：-40℃～85℃
• Dimension：78.0mm*68.0mm

 

 

DOCUMENTS

 

 

• Product wiki
• More Documents