EVIX-CX3AA IXYS-DIRECTED ENERGY, EVIX-CX3AA Datasheet - Page 3

• Manufacturer Part Number: EVIX-CX3AA
• Description: Solar Charger Evaluation Board
• Manufacturer: IXYS-DIRECTED ENERGY

Specifications of EVIX-CX3AA

• Silicon Manufacturer: IXYS Solar
• Silicon Core Number: XOB17-12x1
• Kit Application Type: Power Management - Battery
• Application Sub Type: Battery Charger

Relative Lighting Power Density
Figure 2 compares relative power density for various lighting conditions in units of Watts
per square meter (W/m
Watts per square meter of sunlight irradiance at a constant 25°C cell temperature and at
1.5 Air Mass (Air Mass stands for a well defined light spectrum which appears if the sunlight
goes through the earth’s athmosphere at a defined angle).
power density of typical indoor lighting is dramatically lower than that of sunlight. Not only
is
Office Space lighting with a spectrum produced from incandescent or halogen light bulbs,
the power output may be roughly 100 times less than bright sunlight. It may be 200 to 500
times less with fluorescent lighting due to the further limited spectrum.
General Industry Standards for Batteries
The primary rating of a battery is its capacity, symbol C, which refers to its ability to
deliver current (power) while discharging over time. Capacity is stated in either milliamp-
hours (mAh) or amp-hours (Ah) and increases slightly with lower drain current and higher
temperature. Because these conditions affect capacity, additional manufacturer data
typically includes a specified discharge time period, temperature, and a voltage cutoff point
(such as 0.8 V for alkalines). For example, if an alkaline battery provides 50 mA for 20
hours until it discharges to 0.8 V (95% exhausted), then its capacity is 50 mA x 20 hours =
1000 mAh for that cutoff voltage.
irradiance from indirect and artificial light lower; the spectrum is also narrower.
2
).
Fig. 2 Relative Light Power Densities
The reference standard condition is 1 Sun and is equal to 1000
-3-
SOLAR
SOLAR
As the chart clearly shows, the
In typical