Solar Power Manager (for 9V/12V/18V solar panel)

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The DFRobot Solar Power Manager series are designed for IoT projects and renewable energy projects, providing safe and high-efficiency embedded solar power management modules for makers and application engineers.

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

Solar Power Manager

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