Selection Guide

Name

Solar Power Manager

★

Solar Power Manager 5V

SKU

DFR0535

DFR0559

Solar Power

Management IC

LTC3652

CN3065

Solar Input Voltage

7V ~ 30V

4.4V ~ 6V

Maximum Charge

Current

2A

900mA

Topology

DC-DC Buck

Linear Regulator

Battery

3.7V Lithium Battery

3.7V Lithium Battery

MPPT

Yes (9V/12V/18V Optional)

Yes（Fixed 5V）

Battery Protections

Over Charge/Over Discharge/Over Current/Reverse

Connection Protections

Over Charge/Reverse Connection Protections

Output Protections

Short Circuit/Over Current/Over Heat Protections

Short Circuit/Over Current Protections

USB Charge IN

Yes

Yes

USB OUT

5V 1.5A

5V 1A

Regulated OUT

Three Regulated Outputs

3.3V 1A；5V 1.5V；9V/12V 0.5A

One Regulated Output

5V 1A

Dimension

78.0mm×68.0mm

33.0mm×63.0mm

Features

A complete multifunction solar power management

module.

Applications: Small Solar Street Lamp, Solar Powered

Robots

For 9V/12V/18V Solar Panels within 20W

A small and easy-to-use 5V solar power

management module.

Applications: Solar Power Bank, Solar

Environment Monitors

For 5V Solar Panels within 10W

Introduction

DFRobot Sunflower focuses on high-efficiency small power solar energy harvesting and

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 protection 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.