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MAS9011 Fiches technique(PDF) 3 Page - Micro Analog systems

No de pièce MAS9011
Description  Solar Cell System Manager
Download  9 Pages
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Fabricant  MAS [Micro Analog systems]
Site Internet  http://www.mas-oy.com
Logo MAS - Micro Analog systems

MAS9011 Fiches technique(HTML) 3 Page - Micro Analog systems

  MAS9011 Datasheet HTML 1Page - Micro Analog systems MAS9011 Datasheet HTML 2Page - Micro Analog systems MAS9011 Datasheet HTML 3Page - Micro Analog systems MAS9011 Datasheet HTML 4Page - Micro Analog systems MAS9011 Datasheet HTML 5Page - Micro Analog systems MAS9011 Datasheet HTML 6Page - Micro Analog systems MAS9011 Datasheet HTML 7Page - Micro Analog systems MAS9011 Datasheet HTML 8Page - Micro Analog systems MAS9011 Datasheet HTML 9Page - Micro Analog systems  
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DA9011.001
28 Jan 2004
3 (9)
FUNCTIONAL DESCRIPTION
The solar manager generates three signals: PO
(Power On), LB (Low Battery) and SOL (Full
Battery).
These signals are produced by three comparators
which have hysteresis build in. Each comparator
compares supply voltage (VDD) to
internal
switching levels (see Electrical Characteristics on
next page). The current consumption of the
comparators is very low. The electrical parameters
are described more detailed in the Electrical
Characteristics chapter.
PO signal can be used to stop the whole system
whenever the power supply level has dropped low
enough. When power supply voltage is too low, the
PO
goes
high
to
give
signal
to
watch
microcontroller to go power down.
LB signal indicates that the battery is low but not
empty. LB goes high when power supply level is too
low.
SOL is used for battery charging control of the solar
watch. When power supply voltage goes high
enough, the internal PMOS switch between VDD
and SOL pins is switched on to shunt the solar cell
charging
current
and
to
prevent
battery
overcharging.
In operation without an external Schottky diode
between the pins SOL and GND, the voltage at pin
SOL is clamped to about 700 mV below GND by a
diode-connected PNP transistor.
MAS9011 does not have any control pin. After the
power supply is connected the device is ready to be
used.


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