Solar Power Manager Micro is a micro power, high-efficiency management module, designed for powering IoT based low-power sensors or controllers with 1V~3V small size . Benefited from its extremely low power dissipation and (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 constant voltage ratio MPPT (Maximum Power Point Tracking) algorithm to maximize 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 , lipo battery may suffer from over-discharge problem when it is cloudy for days, or the capacity of battery can not meet the device’s need. The battery over-charge and over-discharge protections are designed to prevent such problems to extend battery life.

Board Overview

Solar Power Manager Micro Board Overview

Connection Diagram

Power micro:bit with Small Solar Panel

Power Firebeetle Series with Small Solar Panel

Features:

• Constant voltage ratio MPPT algorithm, maximizing solar power conversion
• Designed for 1V ~ 3V small solar panels, ultra low power design
• Solar/USB two charging methods
• Multiple protections extending battery life

Applications:

• Wireless Sensor Network
• Bluetooth iBeacon
• Solar Powered Toys

Specification:

• 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
• Maximum Charge Current: 100mA@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
• Quiescent Current: <3 uA
• Protection Functions
  •        BAT IN: Over-discharge/Over-charge/Reverse Connection Protections
  •        OUT: Short Circuit/Over Current Protections
• Operation Temperature: -40℃～85℃
• Dimension: 30.0mm*30.0mm

Solar Panel 2V 160mA

• Nominal Voltage (V_MP): 2V
• Nominal Current (I_MP): 160mA
• Open Circuit Voltage (I_OC): 2.4V
• Short Circuit Current (I_SC): 190mA
• Solar Cell Material: Monocrystalline Silicon
• Other Features: Waterproof, Oil Resistant and Corrosion Resistant
• Dimension: 50mm*50mm

Documents:

Product Includes:

• Solar Power Manager Micro                                                      x1
• Monocrystalline Silicon Solar Panel 2V 160mA 50*50mm                       x1
• Red Single Conductor Wire 15cm 24AWG                                                     x2
• Black Single Conductor Wire 15cm 24AWG                                            x2
• PH2.0-2P Male Power Wire 15cm                                                                  x1
• XH2.54-2P Header                                                                                          x2