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Lithium-ion Rechargeable Battery Protection ICs  Highly reliable with the long history for 15 years,(Overwhelming lineups of 500 products)
Wide lineups of  500 productsLong history  for 15 yearsHigh accuracy, low current consumption

We SII have various lineups of more advanced lithium-ion rechargeable battery Protection IC which are small, and have a high accuracy, the low current consumption.

Highly reliable due to the high-withstand CMOS process and the long history, these ICs are ICs suitable for lithium-ion rechargeable battery protection. We have various lineups such as for multi cells one to five, for secondary protection. Our lithium-ion rechargeable battery protection ICs satisfy customer's request and strongly support the new product design.

Specs / Data Sheets
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1. Overwhelming lineups of approximately 600 products

Various lineups

The protection ICs for 1 cell is suitable for making mobile phones and smartphones smaller and lighter. For the ICs, small package SNT-6A (1.6×1.8×0.5mm) is used, and they have a high-accuracy voltage detection circuit and a delay circuit. They are suitable for battery pack for mobile phone because the necessary external parts to be set will be fewer.
The ICs for 2 cells are suitable for various applications such as video cameras and digital cameras.
The ICs for 3 cells can be used for applications which use the large power supply voltage such as notebook PC.
Moreover, we have various lineups for 5 cells, switch to 3 cells/4 cells, for second protection, for voltage monitoring.

  • For 1 cell, 200 products. For 2 cells, 120 products. For 3 cells, 40 products. For 4 cells, 10 products
    For 3/4-cell swicting, 80 products. For second protect, 80 products. For voltage monitoring, 60 products.
  • IC enables series connection of 5 or more cells (by cascade connection)
  • Other various combinations of ICs are also available. Contact us.

2. Long history for 18 years

Design historySince 1990's, lithium-ion batteries have been used in various portable devices.
We SII has been designing and developing the lithium-ion battery protection ICs from then.
Since 1993, we have started designing general-purpose ICs, and also many ICs for various cells and for second protection are used in the industry.
Our long history for 18 years strongly assures the customer's product development.

3. High-accuracy, low current comsuption
High-accuracy, low current comsuption

We have the products with high-accuracy and low current consumption such as;
Accuracy of overcharge detection voltage : ±20mV~
Accuracy of overcurrent detection voltage : ±10mV~
Current consumption at operation : 2.8µA typ.~

Specs / Data Sheets
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