DS-72-40 Datasheet, PDF (4/17 Pages) Cymbet Corporation – EnerChip™ CC Energy Harvester Evaluation Kit

CBC-EVAL-10B EnerChip CC EH Evaluation Kit
After confirming the header pins are properly configured, simply connect the 2-wire cable assembly from the PV
panel to jumper J8. [Note polarity; red wire goes to the positive terminal, pin 1.]
Expose the PV panel to ambient light of greater than 200 Lux. The EnerChip storage devices on the CBC51100
module will begin to charge and power will be supplied to the load via header pins J9 and J10. The magnitude
of power available to the load will be a function of the ambient light, the angle of incidence of light to the PV
panel, and the state of charge of the EnerChips.
To verify that the circuit is operating properly, measure the voltage on any of the readily accessible test points:
Test Point Node Description
TP1 External Battery Terminals
TP2 System Ground
TP3 PV Input
TP4 Switched Output
TP5 System Ground
The various header pins may also be used as test measurement points. Refer to the schematic of Figure 6.
Reference the CBC3150 data sheet for operating characteristics of the CBC3150.
Users may populate R2 and R3 to set the maximum power point of the DC transducer. See the CBC3150 data
sheet for recommended resistor values. Note that the resistor divider will present a parasitic load to the trans-
ducer. Changing these resistors will also require a different voltage POR circuit U3 if you are moving the voltage
down from 3.0 volts.
Connecting CBC-EVAL-10B to the System
The CBC-EVAL-10B board has two control lines that can be connected to a microcontroller (MCU) for the
purpose of conserving available energy, using incoming power efficiently, and extending EnerChip battery life.
The table below describes the functionality of the J9 and J10 connector pins.
Pin
BATOFF
CHARGE/
VOUT
GND
NC
J9 and J10 Pin Descriptions
Designation
Input control line to the CBC-EVAL-10B for disconnecting the EnerChips
from the CBC-EVAL-10B charging circuit. See the section System Design
Recommendations to Save Power for additional information.
Active low output from the CBC-EVAL-10B indicating that the EnerChips
have been charged or are being charged (provided CBC3150 EN pin was/
is high). CHARGE/ is an open drain output with an internal 1.0MΩ pull-up
resistor to VOUT. See the section System Design Recommendations to
Save Power for additional information.
CBC-EVAL-10B output power
System ground
No connection
(J9 has one NC pin and J10 has two NC pins)
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DS-72-40 Rev C

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