Posts Tagged ‘battery charger’

App note: How to shrink your USB Type-C battery charger

Sunday, June 9th, 2019

Maxim's app note on a highly compact Type-C charger solution. Link here (PDF) A highly integrated solution, as seen with the MAX77860 USB Type-C 3A switch-mode charger, dramatically reduces system complexity by integrating the charger, the power path, the Safeout LDO, ADC, and the USB-C CC and BC 1.2 detection...

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App note: Active cell balancing in battery packs

Sunday, April 28th, 2019

Cell balancing implementation from NXP Semiconductors. Link here (PDF) Batteries made of multiple cells connected in series are often used as a power source for common electronic devices. In multicell battery chains, small differences between the cells (due to production tolerances or operating conditions) tend to be magnified with each...

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App note: Power battery charger application guidelines

Sunday, October 14th, 2018

App note from Holtek on smart battery chargers. Link here (PDF) Battery chargers usually are products which transfer alternating currents to low voltage direct currents and which are widely applied in various rechargeable battery application fields. According to different applications, battery chargers can be divided into two types, namely digital...

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App note: Switching battery chargers

Sunday, August 26th, 2018

App note from Richtek about several aspects of switching chargers for single cell Li-Ion batteries. Link here (PDF) Longer battery life and shorter charging times are some of the challenges in battery management in modern hand-held applications like Smart-Phones, Tablet PCs, POS and other portable equipment. Devices with powerful processors...

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App note: High-speed lithium-ion battery charger

Sunday, April 22nd, 2018

C8051F300 implementation of Li-Ion battery charger from Silicon Labs. Link here (PDF) Driven by the need for untethered mobility and ease of use, many systems rely on rechargeable batteries as their primary power source. The battery charger is typically implemented using a fixedfunction IC to control the charging current/voltage profile....

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Solar battery charge controller teardown

Monday, January 2nd, 2017

[embed][/embed] A teardown video of a solar battery charge controller from Electronupdate: A solar battery charger: one side goes to a Solar Panel, the other to a lead-acid battery. A charge controller allows the battery to be safely charged. Snagged off of Amazon. Seemed really cheap at $17.36. A look...

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Teardown of a Vivitar Rapid battery charger

Wednesday, December 14th, 2016

Kerry Wong did a teardown of a Vivitar rapid battery charger for the NP-FW50 lithium-ion battery pack used in Sony A6000 digital camera: The circuit board itself though looks surprisingly clean and well designed. It does not use any dedicated lithium ion battery charging ICs however. Rather a MC34063A buck/boost...

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Posted in Teardowns | 1 Comment »

Dewalt DW9118 battery charger teardown

Wednesday, July 13th, 2016

[embed][/embed] Dewalt DW9118 battery charger teardown video from Electronupdate: Tear down of a failed Dewalt DW9118 charger. A look at the circuit board, the fuse, circuit topology and a decap an analysis of the Zilog Z86C04 controller. More info at Electronupdate blog.

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Capacitive battery charger

Tuesday, April 26th, 2016

Marcus Jenkins made a capacitive battery charger using Dirty Board PCB's to revive rechargeable batteries: This is really a basic, bare-bones circuit. I’ve prepared the PCB with a view that it could be used as a module in a rather more-sophisticated charging system. You could imagine using a microcontroller (e.g....

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LiFePO4 charger

Tuesday, October 6th, 2015

Markus Gritsch shared his LiFePO4 charger project in the forum: Since I really like using LiFePO4 AA and AAA batteries in some of my projects, I finally gave in and built a dedicated charger for them. Previously I used a lab power supply to mimic the constant current/constant voltage charging curve, which...

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Posted in project logs | 12 Comments »

App note: Get a constant +5V output by switching between a +5V input and a single-cell LI+ rechargeable cell

Sunday, August 23rd, 2015

App note from Maxim Integrated on providing smooth power from two sources. Link here (PDF) Design provides a simple method for maintaining an uninterrupted +5V even while switching between the external +5V supply and a rechargeable single-cell Li+ battery.

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LiTiny- A Tiny LiIon charger for most things battery

Wednesday, July 1st, 2015

Rohit Gupta made this LiTiny project, a tiny LiIon charger: In the end I had a LiIon charger capable of charging batteries @700mA restricted due to thermal dissipation limits of home made PCBs. Project details at Rohit's blog.

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Posted in DIY | 1 Comment »

3.7V Li-Ion battery charger circuit

Monday, March 2nd, 2015

From the comments on our earlier standalone Linear Li-Ion battery charger with thermal regulation in ThinSOT app note post, Jan writes: Nice chip, indeed. Unfortunately not easy to find stocked – here I can get it only from Farnell (5 euro + VAT a pop) or Digikey ($3/pc + VAT +...

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Posted in power supply | 6 Comments »

Simple automatic car battery charger

Wednesday, November 26th, 2014

Dilshan Jayakody has published a new build, an automatic car battery charger: This is modified version of commonly available automatic car battery charger system. I obtain original layout of this charger from one of the commercially available Chinese car battery charger and modified some of the sections of original schematic to...

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Lithium iron phosphate (LIFePO4) battery charger

Thursday, February 7th, 2013

After two DIY Li Ion chargers this week (first, second), here is a lithium iron phosphate (LIFePO4) battery charger. These batteries are a safer cousin to the standard Li-Ion batteries, but sacrifice some of it's energy density for the safety. The charger above is designed around the PIC12F510 microcontroller which...

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Posted in Lithium Ion | 3 Comments »

£1 Lithium Ion battery charger

Wednesday, February 6th, 2013

Here's another custom Li Ion battery charger and holder. Yesterday we ran a post involving a custom battery holder for cell phone batteries, today it's a holder for a more conventional 18650 type Li Ion batteries. To make a battery charger, just solder the red and black leads to the...

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Posted in DIY, Lithium Ion | 21 Comments »

Open source DIY friendly Li Ion battery charger

Monday, February 4th, 2013

Miceuz designed 2 open source single sided boards for Li Ion battery chargers. He used the MAX1555 and MCP73831 ICs as the charging controller, power is provided through USB. We especially like his battery holder rig. For a long time I wanted to enter the 21st century by stopping using...

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Posted in DIY, Lithium Ion | 2 Comments »

App note: SMBus-programmable battery chargers

Saturday, May 14th, 2011

rsdio writes:  SMBus is similar to I2C, and should therefore be easily connected to most PIC or AVR projects. Highly integrated, 850kHz/500kHz SMBus-programmable battery chargers: MAX17435/MAX17535, highly integrated SMBus™ battery chargers capable of operating at 850kHz and 500kHz, respectively. Unlike competitive solutions, MAX17435/MAX17436 allow the charge setting to be programmed...

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Posted in app notes | 1 Comment »

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