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2-Cell Li-ion Battery Protection ICs

Ricoh's 2-cell Li-ion/polymer battery protection ICs have a high accuracy. Especially R5462 Series have a high accuracy over-charge detection of±10mV in a temperature range from 0°C to 50°C.

Product
Name
Overcharge
Detector
Threshold [V]
(Accuracy)
Overdischarge
Detector
Threshold [V]
(Accuracy)
Excess Discharge
Current Detector
Threshold [V]
(Accuracy)
Excess Charge
Current Detector
Threshold [V]
(Accuracy)
Supply
Current
[µA]
Alarm
Function
Package Download
R5460 4.2 to 4.5
or
3.5 to 4.0
(±25mV)
2.0 to 3.0
(±2.5%)
0.05 to 0.20
(±15mV)
-0.1 or
-0.2 (±30mV)
or
-0.4 (±40mV)
4.0 Not
Available
DFN(PLP)1820-6
SOT-23-6
Datasheet
R5462 3.65 to 4.32*1
(±10mV)
2.0 to 3.2
(±1%)
0.05 to 0.20
(±10mV)
-0.2 to -0.1
(±20mV)
4.0 Not
Available
DFN(PLP)1820-6B Flyer
R5463 3.65 to 4.32
(±20mV)
2.0 to 3.2
(±1%)
0.05 to 0.20
(±10mV)
or
0.20 to 0.40
(±10%)
-0.2 to -0.1
(±20mV)
4.0 Not
Available
DFN(PLP)1820-6B Datasheet
R5464 4.0 to 4.3*1
(+10mV/-15mV)
2.0 to 3.0
(±2.5%)
0.05 to 0.24
(±15mV)
-0.22 to -0.1
(±20mV)
5.0 or 6.0 Available DFN(PLP)2527-10 Datasheet
R5466 4.0 to 4.3
(+20mV/-25mV)
2.0 to 3.0
(±2.5%)
0.05 to 0.24
(±15mV)
-0.22 to -0.1
(±20mV)
5.0 Available DFN(PLP)2527-10 -
  • *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.

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 R5464, 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.
  • *)Products built-in the Alarm output pin(AOUT): R5464, R5466

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.:
    R5464, R5466

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