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DS-72-41 Datasheet(PDF) 7 Page - Cymbet Corporation

Part # DS-72-41
Description  Rechargeable Solid State Bare Die Batteries
Download  13 Pages
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Manufacturer  CYMBET [Cymbet Corporation]
Direct Link  http://www.cymbet.com
Logo CYMBET - Cymbet Corporation

DS-72-41 Datasheet(HTML) 7 Page - Cymbet Corporation

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EnerChip™ Bare Die Batteries
©2016 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
DS-72-41 Rev06
Page 7 of 13
Preliminary
BATTERY PERFORMANCE CONSIDERATIONS
There are several considerations that determine EnerChip performance over time and with use. These are:
Temperature
• Battery aging accelerates with increasing temperature.
• The operating temperature range is narrower than the storage temperature range; moreover, the storage
temperature range for an EnerChip that has never been charged is different from that of an EnerChip
that has been charged one or more times - partially or fully.
• Battery impedance increases with decreasing temperature - by a factor of approximately 2 for every
10°C reduction in operating temperature.
Number of Charge/Discharge Cycles
• As the depth-of-discharge on the cell increases, the number of charge/discharge cycles decrease.
• The charge/discharge cycle life of the EnerChip is dependent on a number of variables, including tem-
perature, depth-of-discharge, charging voltage, and discharge cutoff voltage. Note that the CBC910 PMIC
has built in temperature compensation for battery charging.
Input Charging Conditions
• It is important to regulate the charging voltage applied to the EnerChip in order to ensure a long service
life and delivery of the rated capacity.
• Charging at a lower voltage at high temperatures reduces the EnerChip per charge capacity but in-
creased the number of charge/discharge cycles. The CBC910 power management IC performs this func-
tion using temperature compensation circuitry.
Discharge Cutoff Conditions
• During discharge of the EnerChip, the minimum discharge cutoff voltage as specified in the data sheet
must be enforced. If the discharge voltage is allowed to drop below the rated value, particularly at low
discharge currents, the performance of the EnerChip will be degraded, and under certain conditions,
the device will ultimately fail to operate according to specifications.
• Regarding resistance to humidity, chemical exposure, and g-forces, the EnerChip product family is de-
signed to meet JEDEC standards.
In-Circuit Use Guidelines
• Do not connect these batteries to other types of batteries except through an approved charging circuit.
• To increase battery life, avoid installing near heat-generating devices.
GUIDELINES FOR HANDLING ENERCHIPS
Certain precautions should be taken when handling and storing EnerChips.
Temperature and Moisture Sensitivity Level
• Store the EnerChip wafers and bare die batteries in waffle packs in their original packaging in an
environment where the temperature and humidity do not undergo large fluctuations. Store at 10°C to
30°C and at less than 60% relative humidity.
• Treat EnerChip bare die batteries as you would other MSL-1 devices when handling for assembly.
Electrostatic Discharge (ESD)
• Similar to integrated circuits, the batteries are sensitive to ESD damage prior to receiving a charge
cycle. Therefore, adherence to ESD prevention guidelines is required.
• Remove devices from protective shipping and storage containers at approved ESD workstations only.
• All equipment used to process the devices must be configured to minimize the generation of static
charges. This includes soldering and de-soldering equipment and tools, pick-and-place equipment, test
equipment, and all other tools and equipment used to handle or process the devices.
• Failure to observe these precautions can lead to premature failure and shall void product warranty.


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