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產品資訊

產品資訊 > RICOH > Li-ion Battery Protection ICs > Multi-Cell
Multi cell Li-ion/polymer Battery Protection IC Products Lineup

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)
Overcharge
Output Delay
Time [s]
COUT Output
High Voltage[V]
Shutdown
Detector
Threshold [V]
Shutdown
Current
[µA]
Supply
Current
[µA]
Remarks Package Download
R5431 3 to 4 3.6 to 4.5
(±25mV)
2.0 to 3.0
(±2.5%)
VDD-0.2
(±20mV)
VDD-0.6
(±100mV)
VDD+0.2
(±30mV)
12.0
  • High side protection FET
SSOP-16 Datasheet
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)
3×VD3-1
(±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
NEW
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%)
  • *16 Cell, 8 Cell, 10 Cell protection or other/higher cell combinations possible by connecting multiple R5432V ICs in cascade.

TYPICAL APPLICATION

>TYPICAL APPLICATION

Cell Balance Operation

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.

Cascade Connection