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[Torex] How to use LDO regulator to charge small lithium-ion batteries (3/3)

  • Author:Torex
  • Release on:2021-01-12

LDO rechargeable battery manufacturer

More and more manufacturers are promoting these new batteries, you can find more information through the following links:

NGK insulator Chip ceramic rechargeable battery "EnerCera" series

https://www.ngk-insulators.com/cn/product/electron/enercera/

  • NGK approves XC6240 and XC6140 for use with EnerCera series.
  • EnerCera Coin is suitable for reflow soldering and higher temperatures.
  • EnerCera Pouch is suitable for thermal lamination production of smart cards.

Murata Small lithium ion secondary battery

https://www.murata.com/zh-cn/products/batteries/small/

  • XC6215 VOUT = 2.60V is compatible with CT04120.
  • fast charging.It can be charged at a high rate (10C).

Nichicon Small lithium ion rechargeable battery

https://www.nichicon.co.jp/cn/products/slb/about/

  • XC6215 VOUT = 2.70V is compatible with SLB03070.

Samples and evaluation boards

Samples of all Torex products mentioned in this feature are available immediately, so please ask your local Torex representative for detailed information, or contact us directly through our website.

We also provide a dedicated evaluation board for testing circuits using NGK EnerCera batteries.These evaluation boards consist of two parts, one for the charging function and the other for the power supply.Customers can use power equipment to test the remaining circuits.

The power supply device has a Boost Micro DC/DC (with integrated coil) and a standard LDO installed.The layout of the optional Buck Micro DC/DC (with integrated coil) is also included.

Our standard power supply unit has 3.3V Boost Micro DC/DC and 1.8V low-power LDO, but Buck Micro DC/DC is not installed.

smallThe EMI customized version of the power supply unit can also provide customers with special voltage requirements, or if a step-down miniature DC/DC is required.

Please note that Torex does not provide batteries, but these batteries can be purchased directly from the battery manufacturer.

Torex IC is included in the table below

Charging unit

Power supply unit

LDO charges XC6240A2638R-G Low lq LDO XC6215B182NR-G
RESET IC for battery voltage monitoring

XC6140C20A9R-G

Boost Micro DC/DC XCL103D333CR-G
Wireless power receiver XCM414B050D2-G Step-down miniature DC/DC (optional) XCL220Bxx3FR-G

The circuits of these evaluation boards are as follows:

Charging unit

The evaluation board can be used for both DC and ANT inputs. However, if only the DC input is used, the Schottky barrier diode on the DC input side is not required.

Power supply unit

The CE pin of each IC can be connected to the RESETB output of XC6140 or pulled up/down to VIN/GND

Data sheet and more information

For more information on the Torex products highlighted in this article, see:

XC6140series:https : //www.torex-europe.com/products/voltage-supervisors/low-power/xc6140/

XC6215series:https : //www.torex-europe.com/products/voltage-regulators/low-iq/xc6215/

XC6240series:https : //www.torex-europe.com/products/voltage-regulators/low-iq/xc6240/

XCM414series:https: //www.torex-europe.com/products/multi-chip-modules/xcm414/

XCL103series:https: //www.torex-europe.com/products/micro-dc-dc/step-up-1/xcl103/

XCL220series:https: //www.torex-europe.com/products/micro-dc-dc/step-down-1/xcl220/