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Simple Battery Circuit Extends Power over Ethernet Poe Peak Current -
DN361 Design Notes (Linear Technology) (app note added 1/06)
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Simple Li-ION Charge Termination using the LT1505 - DN244 Design
Notes (Linear Technology) (app note added 2/06) |
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Simple Lithium-ion/ Lipo Battery Charger - This is a Lithium-ion
charger for lipo batteries. Circuit schematic shows configuration for charging
single 3.7V lipo battery but voltage can be set to charge several batteries in
series. Lipo charger sets a current limit with the LM317, and 1 resistor, and
the voltage limit with the TL431, and 2 resistors. 1K resistor is needed to let
the TL431 decrease the LM317 current, and to provide the necessary current to
the TL431. The optional Schottky diode at the output will prevent current
flowing back from battery to the charger circuit when power is disconnected, and
reverse biasing of the LM317. Power supply with more than 3V above output
voltage is required. ….(electronic schematic added 11/08) |
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Simple test setup performs functional testing of linear, single cell lithium
chargers - 10-May-07 Issue of EDN A handful of off-the-shelf
components makes a test setup that allows you to test the operation of a linear
single-cell lithium charger.... [Design Idea by Marián Štofka, Slovak University
of Technology, Bratislava, Slovakia] |
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Smart Battery Charger Reduces Circuit Size - DN1005 Design Notes
(Linear Technology) (app note added 1/06) |
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Smart Battery Charger with Smbus Interface - Microchip Application
Note Published 26-Aug-97 (app note added 2/06) |
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Smart Battery Charging with COP8ACC - National Semiconductor
Application Note (app note added 2/06) |
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Smbus Level-3 Battery Charger/Selector Reference Design Based on the PIC16C73a
- Microchip Application Note Published 11-May-98 (app note added
2/06) |
| Solar Powered Lithium Ion Battery Charger -
The circuit below feeds a controlled current and voltage to a 3.6v lithium ion
battery. The current is limited to 300ma and the voltage is limited to 4.2
volts. The circuit uses a LTC1734 IC from Linear Technology. No diode is needed
between the circuit and a 6 volt solar panel....…. [Hobby Corner Circuit by Dave
Johnson] |
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Switching Current Pump Makes Better Charger - 01/16/97 EDN-Design
Ideas Many currently proposed battery-charger designs are simply voltage
regulators redesigned to be current sources. Unfortunately, this design approach
is far from optimal because it leads to unnecessary hardware redundancy and
complexity. This type of charger also raises a stability problem because
of the additional active device in the feedback loop....[Design Idea added
08/05] EDN migrating links. This link is not verified. Google the "title"
EDN for new link. |
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USB Port-Powered Li-ION/Li-Polymer Battery Charging - Microchip
Application Note Published 31-Jan-05 (app note added 2/06) |
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Very Low Cost SOT-23 Li-ION Battery Charger Requires Little Area & Few
Components - DN250 Design Notes (Linear Technology) (app note
added 2/06) |
