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DS-72-20 Rev A

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CBC-EVAL-10

System Features and Overview

CBC-EVAL-10 is a demonstration kit that provides

designers a platform to easily develop Energy

Harvesting (EH) solutions using the EnerChip

harvesting mode. The kit combines a small solar

panel, power management circuit, energy storage,

regulated output voltage, and input/output pins for

connection to commercially available microcontroller

(MCU) and radio boards. A 16-pin CBC51100 module

is included, providing the EH functions, battery

management, and 100µAh solid state rechargeable

energy storage. CBC-EVAL-10 is a practical, low

cost realization of an EH-based power system that

can provide many years of service without need of

battery maintenance.

CBC-EVAL-10 has the following elements:

Energy harvesting circuitry that matches the

•

impedance of photovoltaic cells to ensure

maximum power transfer to system load and on-

board energy storage devices

Solid state energy storage with thousands of

•

charge-discharge cycles available

Integrated battery management that controls

•

battery charging and discharge cutoff, ensuring

maximum service life of on-board storage cells

Provision for additional energy storage (primary

•

or rechargeable batteries) with switchover

control circuit to meet application requirements

Regulated output voltage with user-configurable

•

voltage settings

Input/output headers for connection to system

•

components such as radios and microcontrollers

The photovoltaic (PV) panel included in the CBC-

EVAL-10 converts ambient light energy into electrical

energy, which is fed into the CBC3150 device

residing on the CBC51100 module. The CBC3150

performs several important functions:

Decouples the load impedance from the PV cell

•

impedance to ensure maximum power conversion

efficiency from the PV transducer to the energy

storage and system load.

Controls charge voltage and discharge cutoff

•

circuit for maximizing the service life of the

EnerChip solid state batteries within the CBC3150

and auxiliary CBC050 energy storage device on

the CBC51100 module.

Manages internal circuitry for switching from PV

•

power to EnerChip (or external battery) power when

ambient light level is too low to power the system

and/or recharge the energy storage devices.

CBC-EVAL-10 is shown in Figure 1, including the 16-

pin CBC51100 EnerChip EH module and the PV cells

attached to the board via a 2-wire cable assembly.

A block diagram of CBC-EVAL-10 is shown in Figure 2.

Figure 1: CBC-EVAL-10 Demo Kit.

EnerChip™ CC Energy Harvester Evaluation Kit

Figure 2: EnerChip CBC-EVAL-10 Demo Kit block diagram.

The functions in the center block are performed by the

EnerChip CBC51100 module.

Photovoltaic

Cells

Input Power Tracking

Battery Management

Power Management

Energy Storage

Output Voltage

Regulation

I/O Control

External Battery

and Control

(Optional)