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LA5621M Arkusz danych(PDF) 1 Page - Sanyo Semicon Device

Numer części LA5621M
Szczegółowy opis  Lithium-Ion Battery Charge Control IC
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Producent  SANYO [Sanyo Semicon Device]
Strona internetowa  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA5621M Arkusz danych(HTML) 1 Page - Sanyo Semicon Device

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Ordering number :EN5640A
31000RM (OT) No. 5640-1/6
Overview
The LA5621M and LA5621V are external charge control
ICs for lithium-ion batteries. These ICs are ideally suited
for on/off control of external power MOSFETs in systems
that incorporate a charging circuit in the set. They detect
the charge and discharge status, output it to the set control
microcontroller, which then outputs a signal to switch
external power MOSFETS either on or off. Moreover,
these ICs have a built-in function that detects discharge
(countercurrent) from lithium-ion batteries within sets to
external lithium-ion batteries in an AC adapter/charger,
etc. and switches external power MOSFETs off.
Application
• Charge control of 1- or 2-cell lithium-ion batteries of
video cameras, digital still cameras, cellular telephones,
etc., used in combination with a microcontroller.
Functions
• Charge/discharge: In charge/discharge mode, switch
external power MOSFETs on to charge the battery or
discharge it to set load.
• Charge detection: Detect the charge status of lithium-ion
batteries with comparator.
• Charge completion control: When charging of the
lithium-ion battery is completed, the comparator is
activated and the external power MOSFETs are
switched off to stop charging.
• Countercurrent detection and control:
In systems that support charging of both the set of the
video camera, etc., and the AC adapter/charger, when
spare batteries are charged on the AC adapter/charger
side, if the battery voltage on the set side becomes high
when the set is connected to the AC adapter/charger,
current flows out to the battery on the AC
adapter/charger side. These ICs feature a function that
prevents this from happening.
• Charge prevention: A specified voltage is applied to the
CHARGEINH pin to stop charging.
Features
• The combination of a microcontroller and external
power MOSFETs enables easy charge/discharge control
of lithium-ion batteries.
• Small power dissipation makes these ICs suitable for
sets that require long time operation
• Use of compact package makes these ICs suitable for
compact sets.
• Large power supply operation range supports both 1-cell
and 2-cell lithium-ion batteries.
LA5621M, 5621V
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Lithium-Ion Battery Charge Control IC
Monolithic linear IC
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.


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