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AN-1030

更新时间： 2024-10-29 12:54:11

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EVAL-08 Frequently Asked Questions & Troubleshooting

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Preliminary

AN-1030

Application Note

EVAL-08 Frequently Asked Questions & Troubleshooting Guide

Features

The CBC-EVAL-08 is a demonstration kit combining a

solar panel energy transducer with the EnerChip EH

CBC5300 Energy Harvesting module that has two

50 µAh EnerChip Batteries. The EnerChips provide

storage and starting power for the energy harvesting

module. The purpose of this demonstration platform

is to enable designers to quickly develop Energy

Harvesting applications. A block diagram of the

EVAL-08 is shown in Figure 1.

Figure 2: CBC-EVAL-08 EVAL Kit - 3.55 x 2 in.

Control

Lines

Vout

The power management block is used to protect

the EnerChips from discharging too deeply in low

ambient light conditions, or abnormally high current

load conditions. The power management block

also ensures that the load is powered up with a

smooth power on transition. The power management

block has a control line (CHARGE) for indication to

the system controller that the energy harvester is

charging the EnerChips. A control line input (BATOFF)

is available for the controller to disconnect itself

from the EnerChips when it is desired to conserve

battery life for as long as possible in prolonged low

ambient light conditions.

Photovoltaic

Cell

Connector

Power

Management

Boost

Converter

Charge

Control

2 - EnerChip

CBC050

Figure 1: EnerChip EVAL-08 Demo Kit Block Diagram

The EVAL-08 shown in Figure 2 with the EnerChip EH

Module mounted on the Solar board with 100 µAh

capacity.

System Description

The photovoltaic cells convert ambient light energy

into electrical energy. The output voltage of the

photovoltaic cells is too low to charge the EnerChips

and power the rest of the system directly, so a

boost converter is used to boost the photovoltaic

cell voltage to the voltage needed to charge the

EnerChips.

There are two connectors on the EVAL-08 for

connection to target devices to be powered. Either

connector can be used for low power microcontroller

based systems. In the case of a low-power wireless

end device, the EVAL-08 has storage energy for up to

1000 transmissions - depending on protocol used -

in no/low ambient light conditions.

The charge control block continuously monitors

the output of the boost converter. If the output of

the boost converter falls below the voltage needed

to charge the EnerChips, the charge controller will

disconnect the boost converter from the EnerChips.

This prevents the EnerChips from back powering the

boost converter in low ambient light conditions.

Microcontroller systems that are powered by the

EVAL-08 should contain ﬁrmware that is “Energy

Harvesting Aware” and take advantage of the power

management status and control signals in the CBC-

EVAL-08.

Doc AN-72-1030 Rev02

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