Ricoh Semiconductor Support Centre launches the R5432, R5433, R5434 Series, Multi-cell Lithium-Ion / Lithium-Polymer Battery Protection ICs

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Ricoh Semiconductor Support Centre launches the R5432, R5433, R5434 Series, Multi-cell Lithium-Ion / Lithium-Polymer Battery Protection ICs

Amstelveen, the Netherlands, March 2012 – Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has today launched the R5432, R5433, R5434 Lithium-Ion / Polymer Battery Protection ICs. These three products are especially designed to be used in portable power tools, gardening tools, electric bicycles or other applications using multi-cell Lithium-Ion or Lithium-Polymer batteries.

The new R5432, R5433 and R5434 multi-cell protection ICs have been designed to meet the strict electronic safety measures required for Lithium-Ion / Lithium-Polymer batteries, to ensure the charging and discharging process is kept within the ultimate limits of the battery specifications. Created to monitor 2, 3, 4 or 5 battery cells with one IC, additional ICs can also be connected in cascade to monitor a higher number of cells (R5432 and R5434 only).

R5432 is a primary 3/4/5 cell protection IC with an advanced cell balance function to keep the cell voltage equal for all cells. Once a cell imbalance is detected the battery charge or discharge process is interrupted and the cell with the highest voltage will be discharged by an external MOSFET until it returns to equal voltage. As a result the charge or discharge process will automatically resume to normal. The R5432 contains additional voltage detectors to monitor battery overcharge voltage, over-discharge voltage, excess charge current, excess discharge current and short circuit. A wire breaking detection circuit for enhanced safety is embedded to detect any internal wire break between the battery terminals and the protection circuit board. Once this circuit becomes active the charge or discharge process will be interrupted. Control inputs for cascading are also embedded, which are suitable to monitor a 10 cell battery with two ICs for example. The IC has two outputs to drive external MOSFETs for controlling the charge and discharge process.

The R5433 is a primary 3/4/5 cell protection IC containing two voltage detectors per cell to monitor for a battery overcharge voltage and over-discharge voltage. Once the battery voltage exceeds the monitoring threshold the IC will interrupt the charge or discharge process and keep it within the safety limits. A wire breaking detection circuit (between the battery terminals and the PCB) for enhanced safety is embedded and the IC features an option to select from two different outputs (CMOS or N-Channel) to drive an external circuit for controlling the charge and discharge process.

The R5434 is a 2/3/4/5 cell secondary protection IC and used as a final protection in case all primary electronic protection circuits fail. The R5434 contains cell overvoltage monitoring only and becomes active in case the cell voltage exceeds the threshold settings. Once active it will turn on a MOSFET which will blow an internal fuse as a safety measure and protect the application from further damage.

R5432, R5433, R5434 Features: 

Partnumber

 

 

R5432V

 

R5433V

R5434D

Number of Cells

 

 

3/4/5

 

3/4/5

2/3/4/5

Supply Voltage

Absolute Max.

 

30V

 

30V

30V

Supply Voltage

Recommended

 

2.0V to 25V

 

1.7V to 25V

4.0V to 25V

Supply Current

 

Typ

12.0μA

 

8.0μA

3.0μA

Detector
Over-charge Voltage

Threshold

 

3.6V to 4.5V

 

3.6V to 4.5V

3.6V to 4.6V

Accuracy

 

±25mV

 

±25mV

±25mV

Delay time

Typ

1.0s

 

1.0s

1.5s

Detector
Over-discharge Voltage

Threshold

 

2.0V to 3.0V

 

2.0V to 3.0V

-

Accuracy

 

±2.5%

 

±2.5%

-

Delay time

Typ

by C1

 

by C1

-

Detector
Excess-discharge Current

Threshold

 

VD3-1 0.1V to 0.3V

VD3-2 0.6V

-

-

Accuracy

 

±20mV

±20mV

-

-

Delay time

Typ

VD3-1 by C2

VD3-2 by C2

-

-

Detector
Excess-charge Current

Threshold

 

-0.05V, -0.1V, -0.2V

-0.4V

-

-

Accuracy

 

±30mV

±40mV

-

-

Delay time

Typ

8ms

 

-

-

Short Protection

Voltage

 

1.0V

 

-

-

Delay time

Typ

300μs

 

-

-

Remarks

 

 

With Cell Balance
Wire Breaking Detection
Cascade Connection

 

No Cell Balance
Wire Breaking Detection

Secondary Protection
Cascade Connection

Package

 

 

SSOP-24

 

SSOP-16

SON-8

Dimensions

 

 

L7.9 x W5.6 x H1.4mm

 

L5.1 x W6.4 x H1.25mm

L2.9 x W3.0 x H0.9mm

 

About Ricoh
Ricoh Company, Ltd. (Ricoh Company) is a Fortune Global 500 company specialising in technology and services that transform high volume, document intensive business processes into more efficient ones.  This is achieved through Ricoh’s expertise in Managed Document Services, Production Printing, Office Solutions and IT Services.  By working with Ricoh, businesses can streamline the way they work, become more efficient and profitable, and share knowledge more effectively within their organisations. With a global workforce of 109,014, Ricoh operates in Europe, the Americas, Asia Pacific, China and Japan.

Ricoh Europe Holdings Plc is a public limited company and the EMEA headquarters of Ricoh Company with operations located in London, United Kingdom and Amstelveen, the Netherlands.  In the fiscal year ended 31 March 2011, revenues from Ricoh's EMEA operations totalled JPY413.9 billion (approx €3.5 billion based on the US Federal Reserve exchange rate 31 March 2011). Ricoh group’s worldwide sales totalled JPY1,942 billion (approx €16.4 billion based on the US Federal Reserve exchange rate 31 March 2011).In March 2001 Ricoh established the European Semiconductor Support Centre to support distributors and customers with their applications or other enquiries about Power Management and Real Time Clock ICs.

For further information please contact:
Ricoh Europe (Netherlands) B.V.
Semiconductor Support Centre
Hans Adams, Manager
Phone: +31 (0)20-5474309
Fax: +31 (0)20-5474791
Homepage: www.ricoh.com/LSI/
E-mail: semicon@ricoh-europe.com

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