Ricoh launches two new 1-Cell Li-Ion/Li-Polymer battery protection ICs series R5475N and R5478N

(PresseBox) ( Amstelveen, the Netherlands, )
Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre, has launched two new 1-Cell Li-Ion / Li-Polymer battery protection ICs, the R5475 and R5478 for use in rechargeable portable electronic devices. The new battery protection ICs offer advanced features including electronic safety measures for the charge and discharge process in order to assure a failsafe operation of the battery pack.

The Li-Ion battery protection IC monitors the charge and discharge process and intervenes as soon as the process is at risk of going beyond the safe operation range of the battery cell. The protection ICs can be used on the application circuit board and also integrated in a laminated battery pack. In particular rechargeable Li-Ion batteries have strict operation limits to keep the battery cell in optimal condition and to prevent a critical situation when overloaded. The R5475 and R5478 offer standard detection circuits for example, over-charge voltage, over-discharge voltage, excess-discharge current and short protection.

As soon the over-charge voltage threshold is exceeded, the chip will interrupt the charge process preventing an overload condition. In the event that the overdischarge voltage threshold is exceeded, the chip will interrupt the discharge process, entering into a standby mode lowering the current consumption and ensuring further discharge is kept to a minimum. Optional latch and auto-release functions for the over-charge and over-discharge monitoring circuits are available. A latch function keeps the chip interrupted from the charge or discharge process while an auto release function tries to resume the process to normal operation after a time out period and when the interrupt condition is resolved to normal.

An excess discharge current detector is triggered as soon the discharge current exceeds a threshold, soaring the load even more will trigger the short protection detector.

The products are available in small packages, meaning they are convenient to use on small circuit boards.

Ricoh has around 20 years of experience developing battery management ICs and established an excellent relationship with market leader Li-Ion battery pack designers and manufacturers. As a result Ricoh obtained nearly 30% worldwide market share for 1-Cell Li-Ion battery protection ICs.

About Ricoh

Ricoh is a global technology company specializing in office imaging equipment, production print solutions, document management systems and IT services. Headquartered in Tokyo, Ricoh Group, operates in more than 200 countries and regions.

In the financial year ending March 2011, Ricoh Group had worldwide sales of 1,942 billion yen (approx. 23 billion USD).

The majority of the company's revenue comes from products, solutions and services that improve the interaction between people and information. Ricoh also produces award-winning digital cameras and specialized industrial products. It is known for the quality of its technology, the exceptional standard of its customer service and sustainability initiatives.

Under its corporate tagline, imagine. change. Ricoh helps companies transform the way they work and harness the collective imagination of their employees. In March 2001 Ricoh Europe (Netherlands) B.V. established the Semiconductor Support Centre to support European distributors and electronics designers and manufacturers with their applications or other enquiries about Power Management and Real Time Clock ICs.

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