CBC-EVAL-10 Cymbet Corporation, CBC-EVAL-10 Datasheet - Page 3

• Manufacturer Part Number: CBC-EVAL-10
• Description: ENERCHIP CC SEH EVAL KIT
• Manufacturer: Cymbet Corporation
• Series: EnerChip™ CCr
• Type: Energy Harvestingr

Specifications of CBC-EVAL-10

• Main Purpose: Power Management, Renewable Energy
• Embedded: No
• Utilized Ic / Part: CBC3150, CBC51100
• Primary Attributes: Thin Film Rechargeable Solid State Battery
• Secondary Attributes: Solar Energy Harvester
• Maximum Operating Temperature: + 70 C
• Product: Power Management Development Tools
• For Use With/related Products: EnerChip CBC51100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 859-1012

External Control of the CBC-EVAL-10 Energy Harvesting Functions
In addition to protecting the EnerChips from being discharged too deeply in low ambient light conditions or
abnormally high current load conditions, the CBC3150 power management circuit also ensures that the
system load is powered with a smooth power-on transition. The power management circuit 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 external controller to disable the CBC3150 charge pump. Use of these
two control lines is optional.
There are several connectors on CBC-EVAL-10 for connection to target devices to be powered. Either the J9 or
J10 connector can be used for low power microcontroller-based systems. In the case of a low power wireless
end device, the CBC-EVAL-10 has storage energy for approximately 1000 radio transmissions - depending on
protocol used - in no/low ambient light conditions.
Microcontroller-based systems that are powered by the CBC-EVAL-10 should contain firmware that is “Energy
Harvesting Aware” and take advantage of the power management status and control signals available on CBC-
EVAL-10.
Using Additional EnerChips and External Batteries
The CBC-EVAL-10 is designed to permit attachment of rechargeable and non-rechargeable batteries whereby
the energy harvesting circuitry extends the life of those batteries by operating from (i) PV cell power when suf-
ficient light is available, (ii) EnerChips when in an acceptable state-of-charge, and (iii) the external battery when
neither of those two conditions exists.
Two classes of external batteries may be attached to the CBC-EVAL-10:
1.
2.
To operate the CBC-EVAL-10 board for use with an external battery, configure the header pins as follows:
1.
2.
DS-72-20 Rev A
A primary battery (i.e., non-rechargeable) or series combination of primary batteries may be connected to
header pins J3 only. The acceptable voltage range is 2.7 to 3.6. Commonly used batteries in this category
are: A single 3V CR-type or BR-type coin cell (e.g., CR2032, BR2032), or two alkaline cells (e.g., AAA, AA, C,
D) connected in series. A single 3.6V thionyl chloride cell may also be used. Contact Cymbet for recommen-
dations in selecting a primary battery for your application.
A secondary (i.e., rechargeable) battery may be connected to header pins J7 only. The acceptable charging
voltage range is 4.0V to 4.2V. The charging source for this battery is the VCHG output pin of the CBC3150
that normally charges the EnerChips to 4.1V. Maximum drive current of this pin is on the order of 1mA.
VCHG drive current can be adjusted by populating capacitor C9 (module shipped without a capacitor).
See DS-72-03 EnerChip CC CBC3150 Data Sheet for guidelines on sizing the charge pump capacitor. The
discharge cutoff voltage is fixed at 3.0V +/- 0.3V. Examples of rechargeable batteries supported by CBC-
EVAL-10 are the LiR-type coin cells, including LiR-1220 (~8mAh) and LiR-2032 (~40mAh). The charging
rate for these external cells will be a function of available light, to a maximum of 1mA as limited by the
CBC3150 charge pump drive current.
Non-rechargeable (i.e., primary) battery connected to EXT BAT terminal block J3:
Rechargeable (i.e., secondary) battery connected to header pins J7:
J1 and J2 - shorted
J4, J5, J6 - not shorted
J7 - no connection
J1, J2 - not shorted
J3 - no connection
J4, J5, and J6 - shorted
©2011 Cymbet Corporation • Tel: [phone] • www.cymbet.com
CBC-EVAL-10 EnerChip CC EH Evaluation Kit
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