Li-ion/polymer Battery Protection ICs

Ricoh's Li-ion/polymer battery protection ICs have been released to the market since 1995, when the Li-ion rechargeable batteries became available. Ricoh has nearly 20 years of experience developing these products. These protection ICs protect batteries provide features like over-charge/discharge voltage, excess charge/discharge current and short circuit.
Ricoh has a wide product portfolio of 1cell protection ICs for smartphones and tablets, 2cell protection ICs for DSLR and portable DVD players, multi cell protection ICs for electrical power tools and E-bike and 2nd protection ICs for notebook PCs and electrical power tools.

2cell Li-ion/polymer Battery Protection IC Products Lineup

Ricoh's 2cell Li-ion/polymer battery protection ICs have a high accuracy. Especially R5461K and R5464K Series have an ultra high accuracy over-charge detection of +10mV and -15mV in a temperature range from 0°C to 50°C.

Product Name R5460x R5461K R5462K R5463K R5464K
Supply Current Typ. 4.0µA 4.0µA or 5.0µA 4.0µA 5.0µA or 6.0µA
Standby Current Max. 0.1µA or 2.0µA 0.1µA 0.1µA or 2.0µA  0.1µA
  Over-charge
 Detector Threshold Range
(Accuracy)
4.2V to 4.5V
or
3.5V to 4.0V
(±25mV)
3.60V to 4.35V*1
(+10mV/-15mV)
3.65V to 4.32V*1
(±10mV)
3.65V to 4.32V
(±20mV)
 4.0V to 4.3V*1
(+10mV/-15mV)
Output Delay Time Typ. 1.0s  
Protection Auto release
  Over-discharge
Detector Threshold Range
(Accuracy)
2.0V to 3.0V
(±2.5%) 
2.0V to 3.2V
(±2.5%) 
2.0V to 3.0V
(±50mV)  
Output Delay Time Typ. 128ms  
Protection Latch
or Auto release
Latch Latch
or Auto release
Latch
  Excess discharge current
Detector Threshold Range
(Accuracy)
0.05V to 0.20V
(±15mV)
0.05V to 0.24V
(±15mV)
0.05V to 0.20V
(±10mV)
0.05V to 0.20V
(±10mV)
or
0.20V to 0.40V
(±10%)
0.05V to 0.24V
(±15mV)
Output Delay Time Typ. 12ms   12ms or 24ms 12ms   12ms or 16ms
  Excess charge current
Detector Threshold Range
(Accuracy) 
-0.1V
(±30mV)
or
-0.2V
(±30mV)
or
-0.4V
(±40mV)
-0.22V to -0.1V
(±30mV)
-0.2V to -0.1V
(±20mV)
-0.22V to -0.1V
(±20mV)
Output Delay Time Typ. 8ms
  Short Protection
Detector Threshold Typ. 1.0V
Output Delay Time Typ. 300µs
Product Name R5460x R5461K R5462K R5463K R5464K
0V charge Acceptable Selectable Prohibited Selectable
Remarks   with Alarm function High precision   with Alarm function
Package DFN(PLP)1820-6
SOT-23-6
DFN(PLP)2527-10 DFN(PLP)1820-6B DFN(PLP)1820-6B DFN(PLP)2527-10
Flyer(PDF) Download Download Download Download  
Code List Excel - - - -
  • *1Topt=0°C to 50°C, Considering of variation in parameters.
    We compensate for this characteristics related to temperature by laser-trimming, however, these specifications are guaranteed by design.
  • *All PDF & Excel files are less than 1MB unless otherwise stated.
  • *If you don't have Adobe Reader, you can download free.
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TYPICAL APPLICATION

TYPICAL APPLICATION

TIN: External thermistor connection pin.
RIN: External resistor connection pin.
Ps: P-channel source pin for over-charge alarm output*

  • *)Alarm output pin (AOUT) is a P-channel open drain output.
    In the R5464K, the source of AOUT is Ps pin, not VDD pin. Therefore, the external pull-down resistor, R6 does not have an impact on the drop out between a plus terminal of a battery pack and a VDD pin. Thus, R6 value range is wide enough to choose.

Alarm Function

Alarm Function

When cell 1 voltage or cell 2 voltage exceeds the alarm threshold voltage (VALML), an alarm signal will be present at the AOUT pin. If the detection temperature of thermistor exceeds 45°C, the alarm detect voltage threshold changes to VALMH.
(The detection temperature can be changed)

  • *)Products with alarm output controlled by an external thermistor.: R5461K, R5464K

*

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Product Catalog

  • Product Catalog

    Selection guide is available for download in PDF format.

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