代理产线 理光微电子 锂电池保护IC (Li-ion/polymer Battery Protection ICs)

锂电池保护IC (Li-ion/polymer Battery Protection ICs)

Ricoh's Li-ion/polymer battery protection ICs and Li-ion/polymer battery second protection ICs have been released to the market since 1995, when the Li-ion rechargeable batteries became available. Ricoh has over 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 1-cell protection ICs for smartphones and tablets, 2-cell protection ICs for DSLR and portable DVD players, multi-cell protection ICs for electrical power tools and E-bike and second protection ICs for notebook PCs and electrical power tools.

Ricoh's 1cell Li-ion/polymer battery protection ICs are high precision devices. Not only the over-charge detector threshold, for example, the R5486K Series have an ultra high accuracy excess discharge current detector of 8% accuracy. (If VD3 is less than 38mV, 3.1mV accuracy is guaranteed.) Due to using external sensing resistance solution, R5472x/R5480K/R5486K Series can detect more precise excess charge/discharge current than conventional solution of using FET's on resistance. FET's on resistance is unstable depending on the condition such as gate voltage, temperature, and FET part number. Besides, the R5471L Series have high precision over-charge voltage detector with 10mV accuracy in the temperature range from 0XC to 50XC.

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)
Over-current
Detector
Type
Supply Current
[µA]
Package Download
R5610 4.470 to 4.535 (±20mV) 2.1 to 3.0 (±55mV%) >0.015 to 0.025 (±3mV) -0.045 to -0.026 (±3mV) R 3.0 DFN1816-6 Datasheet
R5611 4.430 to 4.495 (±10mV) 2.1 to 3.40 (±55mV) 0.015 to 0.025 (±3mV) -0.024 to -0.017 (±3mV) R 3.0 DFN1616-6 Datasheet
R5441 4.2 to 4.6
(10mV)
2.0 to 3.4
(2.0%)
0.015 to 0.150
(3mV, 10% or 5mV)
-0.150 to -0.015
(4mV, 20% or 8mV)
R 3.5 WLCSP-8-P2 Datasheet
R5443 4.2 to 4.6
(10mV)
2.0 to 3.4
(2.0%)
0.015 to 0.150
(3mV, 10% or 5mV)
-0.150 to -0.015
(4mV, 20% or 8mV)
R 2.5 WLCSP-6-P7 Datasheet
R5405 4.0 to 4.5
(25mV)
2.0 to 3.0
(2.5%)
0.05 to 0.20
(15mV)
-0.20 to -0.05
(30mV)
FET 4.0 SOT-23-6
DFN(PLP)1616-6
DFN1814-6
-
R5471 4.1 to 4.5
(10mV)
2.0 to 3.0
(2.5%)
0.05 to 0.13
(10mV)
-0.17 to -0.05
(20mV)
FET 4.0 DFN1814-6 -
R5478 4.2 to 4.5,
3.65 or 3.9
(25mV)
1.9 to 3.0
(2.5%)
0.05 to 0.20
(15mV)
- FET 3.0 SOT-23-6 Datasheet
R5487
R5497
4.2 to 4.6
(20mV)
2.0 to 3.0
(35mV)
0.025 to 0.15
(5mV or 10mV)
-0.15 to -0.02
(10% or 5mV)
FET 3.0 DFN1814-6B
DFN1414-6B
Datasheet
R5492@ 4.0 to 4.5
(20mV)
2.0 to 3.0
(2.5%)
0.05 to 0.20
(15mV)
-0.20 to -0.05
(15mV)
FET 4.0 SOT-23-6 Datasheet
R5499 4.3 to 4.6
(12mV)
2.0 to 3.0
(2.5%)
0.03 to 0.08
(5mV)
-0.10 to -0.05
(15mV)
FET 4.0 WLCSP-6-P4 Datasheet
R5480 4.1 to 4.5
(20mV)
2.1 to 3.0
(35mV)
0.030 to 0.048
(15%)
-0.030 to -0.020
(15%)
R 4.0 DFN(PLP)1414-6
DFN1814-6C
Datasheet
R5486 4.1 to 4.5
(20mV)
2.1 to 3.0
(35mV)
0.015 to 0.046
(8% or 3.1mV)
0.03 to 0.08
(8% or 3.1mV)
-0.060 to -0.015
(15% or 3mV)
R 4.0 DFN(PLP)1414-6 Datasheet
R5494 4.1 to 4.5
(20mV)
2.1 to 3.0
(35mV)
0.021 to 0.048
(10% or 4mV)
-0.030 to -0.020
(15%)
R 3.0 DFN1814-6C -

*1Topt=0XC to 50XC, 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

  • RSENS GOver-current detector input pin

    Due to using external resistance R3, R5480/R5486/R5494 Series can detect more precise excess charge/discharge current than conventional solution of using FET's on resistance. FET's on resistance is unstable depending on the condition such as gate voltage, temperature, and FET part number. (Excess current threshold of R5499 is 5% accuracy.

    *) Products built-in the RSENS pin: R5480, R5486, R5499

Ricoh's 2-cell Li-ion/polymer battery protection ICs have a high accuracy. Especially R5462 Series have a high accuracy over-charge detection of10mV in a temperature range from 0XC to 50XC.

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 -
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=0XC to 50XC, Considering of variation in parameters.

We compensate for these characteristics related to temperature by laser-trimming, however, this specifications is guaranteed by design.

TYPICAL APPLICATION

  • TIN GExternal 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

    *) Products built-in the Alarm output pin(AOUT): R5461K, R5464K, R5466K

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 45XC, 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, R5466K

Ricoh's multi-cell Li-ion/polymer battery protection ICs have several advanced features such as Cell Balance Function, Cascade Connection and Breaking Wire Detection.

Product
Name
Cells 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]
Remarks Package Download
VD3-1 VD3-2
R5432 3 to 5 3.6 to 4.5
(25mV)
2.0 to 3.0
(2.5%)
0.1 to 0.3
(20mV)
0.45 or 0.60
(100mV)
-0.2 to -0.05
(30mV)
or
-0.4
(40mV)
12.0
  • Cascade Connection*1
  • Built-in Cell Balance Function
  • Built-in Breaking Wire Detection
SSOP-24 Datasheet
0.25 to 0.40
(70mV)
0.25 or 0.30
(55mV)
R5433 3 to 5 3.6 to 4.5
(25mV)
2.0 to 3.0
(2.5%)
- - - 6.0
  • Built-in Breaking Wire Detection
  • COUT/DOUT pin Signal Output Type*2
SSOP-16 Datasheet
R5436 3 to 5 3.6 to 4.5
(25mV)
2.0 to 3.2
(2.5%)
0.05 to 0.25
(20mV)
3VD3-1
(50mV)
-0.2 to -0.05
(30mV)
12.0
  • Cascade Connection*1
  • Built-in Cell Balance Function
  • Built-in Breaking Wire Detection
  • External NTC Temperature Protection Function
TSSOP-28 Datasheet
R5650 3 to 5 3.6 to 4.5
(25mV)
2.0 to 3.2
(50mV)
0.03 to 0.05
(5mV),
0.05 to 0.10
(10%)
0.06 to 0.10
(12.5mV)
-0.050 to -0.030
(20%),
-0.025 to -0.015
(5mV)
12.0
  • External NTC Temperature Protection Function
TSSOP-20 Datasheet
0.10 to 0.30
(12.5%)

*1 Cascadable for 6-cell, or higher cell protections.

*2 Over-charge/-discharge is controlled by sending a signal to MCU from the COUT/DOUT pin.

TYPICAL APPLICATION

Cell Balance Operation

  • (1) When a cell voltage is lower than the cell balance threshold, a cell is charged.

    (2) When a cell voltage becomes higher than the cell balance threshold, CB1 pin becomes "H" and N-channel transistor turns on, and then the cell balance operation starts. Then a bypass current flows to the direction of a arrow and a charge current becomes suppressed by the bypass current.

    (3) When a cell voltage reaches to the over-charge threshold, cell charging stops after the output delay time.

    (4) If charging to a cell stops, the cell balance operation continues until a cell voltage becomes lower than the cell balance released threshold. The bypass current continues to flow decreasing the cell voltage.

    (5) When a cell voltage reaches to the cell balance released voltage, CB1 pin becomes "L" and N-channel transistor turns off, and then cell balance operation stops.

Breaking Wire Detection

  • In case of using a battery pack in electric power tools exposed to heavy vibrations, there is a risk that the protection circuit fails due to a breaking wire condition between battery cells and protection circuit board.

    The Breaking Wire Detection circuit performs a test at fixed intervals, depending on the capacitance connected to CTLT pin. When a breaking wire event occurs, it results in interrupting the charge or discharge condition.

Cascade Connection

  • Multi cell Li-ion/polymer battery protection ICs can protect over 6cells by cascade connection.

Ricoh's Li-ion/polymer battery second protection ICs support over-charge voltage protection only. These are suitable from 1-cell to 5-cell battery pack.

Product
Name
Cells Overcharge
Detector
Threshold [V]
(Accuracy)
Overcharge
Output Delay
Time [s]
COUT Output
High Voltage[V]
Shutdown
Detector
Threshold [V]
Shutdown
Current
[µA]
Supply
Current
[µA]
Remarks Package Data
Sheet
R5434 2 to 5 3.6 to 4.6
(25mV)
1.5 3.7 - - 3.0   SON-8 DL
R5435 2 to 3 4.10 to 4.55
(20mV)
2.0 or 4.0 or 6.0 4.7 3.5 0.1 3.0   DFN(PLP)1616-6B
TSOT-23-6
DL
R5437 1 to 3 4.10 to 4.60
(20mV)
2.0 or 4.0 or 6.0 4.7 3.5 0.1 0.85   DFN1814-6*1 DL
R5438 1 to 3 4.10 to 4.60
(20mV)
2.0 or 4.0 or 6.0 4.7 3.5 0.1 0.85   DFN1814-6*1 DL
R5439 2 to 4 4.20 to 4.60
(20mV)
2.0 or 4.0 or 6.0 4.7 1: 3.8
2: 2.3 to 2.8
0.2 4.0*2 With VR DFN(PLP)2020-8 DL
R5458 1 4.0 to 4.7
(20mV)
2.0 VDD - 0.5 1.5 @ DFN1814-6C DL
R5640 2 to 5 3.6 to 4.6
(16mV)
2, 4, 6, 10 or 16 4.7 2.5 or 3.7 0.2 2.5   MSOP-8 DL
R5641 2 to 4 4.1 to 4.6
(16mV)
2, 4, or 6 4.7 2.5 or 3.7 0.2 2.8   DFN2020-8C DL

*1 The pin-layout of R5437 and that of R5438 is different.

*2 VCELLn=4.15V, n=1,2,3,4