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.
Ricoh's Li-ion/polymer battery 2nd protection ICs support over-charge voltage protection only. These are suitable from 2cell to 5cell battery pack.
|3.6V to 4.6V
|4.10V to 4.55V
|4.10V to 4.60V
|Output Delay Time||Typ.||1.5s||2.0s or 4.0s or 6.0s||←|
|COUT Output "H" Voltage||Typ.||3.7V||4.7V||←|
|Shutdown Detector Threshold||Typ.||-||3.5V||←|
|Remarks||2 to 5cell||2 to 3cell||1 to 3cell|
（The pin-layout of R5437L and that of R5438L is different.）
|Data Sheet / Flyer (PDF)||DL||DL||DL|