DA6011B.001
18 October, 2011
MAS6011B
Solar Cell Energy Harvesting
System Manager
VDD
MAS6011
XPD
LB
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Ultra Low Power, 110nA
Low Battery Indicator
Precise Power Up/Down
Battery Overcharging
Protection
SW
SOL
GND
DESCRIPTION
The MAS6011 solar cell system manager monitors
the supply voltage and charging of a battery-
powered system containing a small solar cell. The
current consumption of this IC is extremely low, 110
nA, which means the system can charge from very
low light conditions and also stay in power down
mode for years and still operate directly from the
battery before recharging.
To be able to charge a battery also in condition with
very limited light, a large solar cell is usually used.
This can on the other hand easily destroy the
battery due to over voltage during strong sun light.
MAS6011 solves this dilemma and will give secure
protection of a secondary 3V battery over a big
range of light strengths (lx).
Three output signals indicate the state of the
system. Power Down (XPD) indicates whether the
supply voltage is high enough to power up and run
the system. Low Battery (LB) is used to signal the
condition when the battery capacity is low and
when to move to power saving mode. The third
signal, SOL, is used for battery charging control.
When the battery is full it bypasses the charging
current by an internal shunt switch to avoid
overcharging. The SW pin can also be used to
control an external shunt switch for higher currents.
FEATURES
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Ultra Low Current Consumption, typ 110nA
Low Supply Voltage Operation, min 2.0V
Battery Overcharging Protection
Power On Indicator and secure Power ON after
shut down
Deep discharge protection of battery during
shut down mode
Precise Shut Down and precise Low Battery
warning threshold levels
Suitable for rechargeable 3V Lithium Vanadium
Pentoxide (VL-type) batteries
APPLICATIONS
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Solar Powered Watch
Solar Powered Wireless Sensor
Solar Powered Devices with Back-Up
GPS Modules
Time Code Receiver modules
Electronic locks
Energy Harvesting
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MAS [ MICRO ANALOG SYSTEMS ]
