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BU1840AMUV-E 数据表(PDF) 1 Page - Rohm

部件名 BU1840AMUV-E
功能描述  For 2Cell Solar,Synchronous Switch-Mode Charger IC
Download  17 Pages
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BU1840AMUV-E 数据表(HTML) 1 Page - Rohm

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Datasheet
Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
.
1/14
TSZ02201-0Q1Q0AJ00130-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
2.AUG.2012 Rev.001
TSZ22111・14・001
www.rohm.com
For 2Cell Solar,
Synchronous Switch-Mode Charger IC
BU1840AMUV
General Description
The BU1840AMUV device provides the best system to
the product charged with 1cell Li-ion battery and 3cell
Nickel-metal-hydride batteries using the 2cell, 3cell, and
4cell solar panel.
It is possible to boost it according to the voltage of 2 cell
solar panel with built-in the function to boost the low
voltage input.
Moreover, the solar battery maximum dissipation can be
drawn out with built-in the peak power track function. It is
possible to select the the switching frequency according
to the terminal SEL.
It is also possible to monitor the charging current by the
I2C interface.
Built in heat reckless driving protection (Thermal
shutdown), decrease voltage protection, and input
current protection for protection function
Features
Synchronous Switch-Mode Charger for 2Cell Solar
400mA@Battery=3.7V,VIN=1V
MPPT control voltage range:0.7V~1.5V
Charging current completion voltage:
5.0V (hysteresis: 0.075V)
Built in MPPT
Switching frequency (160kHz,320kHz)
Charging current monitor by I2C
UVLO-detect Voltage:0.625V
UVLO-release Voltage:0.700V
Thermal Shutdown
24 pin VQFN024V4040 (4.1mm×4.1mm<MAX>)
Typical Application Circuit(s)
<For 2 Cells Solar>
Applications
Solar mobile phone
Solar audio
Solar portable charger
Solar LED illumination
Package(s)
W(Typ.) x D(Typ.) x H(Max.)
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Typical Performance characteristics
<Efficiency (for 2 cells solar)>
(VINMON=1.0V, OUTS=3.7V, Pin = 50mW ~ 2W)
VQFN024V4040
70
80
90
100
10
100
1000
10000
Pin [mW]
SEL=GND
SEL=VIN


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