DA6011B.001

18 October, 2011

1 (10)

MAS6011B

Solar Cell Energy Harvesting

System Manager

• Ultra Low Power, 110nA

• Low Battery Indicator

• Precise Power Up/Down

• Battery Overcharging

Protection

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

APPLICATIONS

•

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

•

Solar Powered Watch

•

Solar Powered Wireless Sensor

•

Solar Powered Devices with Back-Up

•

GPS Modules

•

Time Code Receiver modules

•

Electronic locks

•

Energy Harvesting

XPD

VDD

SOL

GND

MAS6011

LB

SW