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16hv785: Programmable Lithium & Nickel Battery Charger - Application Note Published 26-Jan-06. . . [Microchip]
2 Cell Lithium Ion Battery
Charger - This circuit was build to charge a couple series
Lithium cells (3. 6 volts each, 1 Amp Hour capacity) installed in a portable transistor radio. The charger
operates by supplying a short current pulse through a series resistor and then monitoring the battery voltage to
determine if another pulse is required. The current can be adjusted by changing the series resistor or adjusting
the input voltage. . . [Designed by Bill Bowden]
8-Solar
Cell Lithium Ion Battery Charger Version 2 - Jim
Wilber looked at my design for a battery charger and sent me some suggested changes. He suggested using the
LTC4412 ideal diode IC to switch off the current path from the solar cell to the battery in darkness. He also
noted that the 2. 5v regulator from Seiko I had selected was no longer in production and suggested using the
shunt reference . . . [Circuit by Dave Johnson P.E., 05/21/13]
Add Charging Status to Simple Lithium-Ion Charger - 10/02/08 EDN Design Idea By adding a few simple components to a single-cell Li-ion
charger IC, you can get LEDs that indicate charging and charge completed. . . [by Peter T Miller, Applied
Inspirations, Bethlehem, CT]
AN1012_SMSC-Performance Analysis and Software Optimization on Systems Using the
LAN91C111 - Application NoteTechnology Inc. . . .
[Microchip App Note last updated on 13-Jan-04]
AN26 Fast Charging Batteries with Zetex
High Current PNP Transistors & Benchmarq Controller ICs -
Zetex Semiconductors Applications Note: High current, fast switching PNP transistors are capable of replacing
large packaged P-Channel MOSFETs, when attention is paid to base drive requirements. This enables space and
performance efficient designs at much reduced cost. . . .
AN40 Lithium Ion Battery Charging using
Bipolar Transistors - Zetex Semiconductors Applications
Note: This application note explores different types of charge techniques and associated discrete pass
elements, highlighting dominant discrete parameters and selection criteria for each charging technique. . . .
AN667: Smart Battery Charger with Smbus Interface - Application Note Published 26-Aug-97. . . [Microchip]
AN947: Power Management in Portable Applications: Charging
Lithium-Ion/Lithium-Polymer Batteries - Application Note
Published 22-Jul-04. . . [Microchip]
AN960: New Components & Design Methods Bring Intelligence to Battery Charger
Applications - Application Note Published 19-Nov-04. . .
[Microchip]
AN971: USB Port-Powered Li-ION/Li-Polymer Battery Charging - Application Note Published 31-Jan-05. . . [Microchip]
Battery
Amp-hour Capacity Tester - I bought some lithium ion
rechargeable batteries a while back. I was planning on using them to modify some solar powered LED spot lights.
What I like about these new batteries is that they are the same size as a standard 1. 5v alkaline AA cell . . .
[Circuit by David Johnson P.E., 02/05/12]
Battery Charging Using SMSC USB Transceivers - AN197_SMSC - Technology Inc. . . . [Microchip App Note last updated on 22-Sep-13]
Battery Rejuivnator for Lithium Batteries - These batteries
are Not Rechargable. But you can get Considerable Extra Life in this way. . . [G.L. Chemelec]
Charge Li Ion
Batteries from AC Line Voltage - 03/02/98 EDN Design
Idea (File contains many circuits, please scroll to find this one) Li-ion battery chargers must apply constant
current when the battery charge is low and constant voltage when the battery charge is high. To avoid battery
damage, the tolerance on the applied voltage must be less than 1%. The charger in Figure 1 complies with these
requirements. . . . [by Matt Schindler, Maxim Integrated Products, Sunnyvale, CA]
Eight-Solar
Cell Lithium Ion Battery Charger Version 3 - A single
lithium ion battery cell needs 4. 2v from a current source to insure it is fully charged. A solar panel with just
enough individual cells wired in series to produce the needed voltage would be more efficient than one with more
cells for a given surface area. If you divide 4. 2 by eight you come up with a figure of 0. 525 volts . . .
[Circuit by Dave Johnson P.E., 05/21/13]
Intelligent
Lithium/Nimh Battery Charger - this will top-up your
motorbike battery in 2-3 hours and switch off. . . [by P. Townshend - EduTek Ltd]
iPOD Charger 1 - MP3 Player Charger. . .
Li-ion battery charger adapts to different chemistries - 09/02/99 EDN Design Idea Rechargeable lithium-ion (Li-on) cells require a precise charging
voltage for maximum performance. The battery chemistry, of which there are many, determines the optimum charge
voltage. Two of the more common charging voltages are 4. 1V±50 mV and 4. 2V±50 mV per cell. Consider the
following situation: You have thousands of three-cell Li-ion battery chargers with an output voltage of 12.
6V±1%. However, because of a battery-chemistry change, your chargers now need 12. 3V±1%. The 12. 6V output is
well-regulated and has current limiting, but the voltage is 300 mV too high, and you cannot easily adjust it. . .
. [by Fran Hoffart, Linear Technology Corp, Milpitas, CA]
Li-Ion Battery
Charging Requires Accurate Voltage Sensing - Analog
Devices-Analog Dialogue. . . [by Buxton, Joe]
Li-Ion Charger - Lithium Ion batteries pack a lot of power by weight compared to other types. There are 2
things that need to be handled differently than NiCad on NiMH. . . . [by Luhan Monat-Mesa Arizona]
Li-Ion Charger - The LP2951 regulator is manufactured by National Semiconductor. The choice of values is from
an application note Battery Charging, written by Chester Simpson. Diode D1 can be any diode from the 1N00x
series, whichever is. . . [Izhar Fareed-Circuit Designer]
Lithium charger - Schematic only, no circuit description. . . [Designer's name not given]
Lithium Ion Battery Charger - Lithium Ion batteries pack a lot of power by weight compared to other types. There are 2
things that need to be handled differently than NiCad on NiMH. . . . [by Luhan Monat-Mesa Arizona]
Lithium Ion Battery Charging using
Bipolar Transistors - Zetex Semiconductors Applications
Note: This application note explores the different types of charge techniques and associated discrete pass
elements, highlighting the dominant discrete parameters and selection criteria for each charging technique. . .
.
Lithium Ion
Solar Battery Charger-#2 - A single lithium ion
battery cell needs 4. 2v from a current source to insure it is fully charged. A solar panel with just enough
individual cells wired in series to produce the needed voltage would be more efficient than one with more cells
for a given surface area. If you divide 4. 2 by eight you come up with a figure of 0. 525 volts . . . [Hobby
Circuit designed by David A. Johnson P.E., 05/22/13]
Lithium Ion, Lithium Poly
Charger Circuit - The above circuit will charge any 2-cell
* Li-Ion battery pack. Maximum current is about 650 milliamps. The circuit is designed for batteries of 900mah or
higher. Note this circuit is NOT for Li-Metal batts (i. e. Duralites). Power source can be a 12v Gell cell (Power
panel) , or can be powered by a car's cigarette lighter. I use an old 12v DC wall transformer (800ma or more. )
Radio shack sells a 12v/1amp wall DC adapter #273-1776 that will work. Supply does not need to be regulated. In
fact my cheap supply outputs 17 volts with no load. . . .
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