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R5461 Series
Li-ion 2Cell Protector with Alarm function

Product Specifications

The R5461 Series are high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable two-cell Li-ion/Lithium polymer, further include an alarm function and a short protection for preventing large external short circuit current and the protection circuits against the excess discharge-current and excess charge current.

Each of these ICs is composed of detectors, a temperature detector, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits. The signal is outputted before detecting over-charge due to having an alarm function.

They are settable for normal, high and low temperature. So they can make it safer to charge a battery. The Over-charge detector threshold and the alarm detector threshold are high accuracy such as +10mV/-15mV. DFN(PLP)2527-10 package is available.


Manufactured with High Voltage Tolerant Absolute Maximum Rating ProcessSupply Voltage (VDD) 12V (Absolute Maximum Rating)
Charge Negative Input voltage (V-) -30V (Absolute Maximum Rating)
Low supply currentSupply Current (IDD) Typ.4.0µA (G Version)
Typ.5.0µA (C Version)
Standby Current (Is) Typ.0.1µA
High accuracy detector thresholdAlarm +10mV/-15mV (0∼60°C)
Over-charge +10mV/-15mV (0∼50°C)
Over-discharge ±2.5%
Excess Discharge-current ±15mV
Excess Charge-current ±30mV
Variety of detector thresholdAlarm 3.2V to 4.5V (0∼45°C)
3.1V to 4.4V (45∼60°C)
Over-charge 3.6V to 4.3V (0∼50°C)
Over-discharge 2.0V to 3.0V
Excess Discharge-current 0.05V to 0.24V
Excess Charge-current -0.22V to -0.1V
Internal fixed Output delay timeAlarm Typ.6ms
Over-charge Typ.1.0s
Over-discharge Typ.128ms
Excess Discharge-current Typ.12ms
Excess Charge-current Typ.8ms
Short Protection Typ.300µs
Alarm threshold can be changed by the temperature Alarm temperature 45°C
Output Delay Time Shortening Function At COUT is "H", if V- is set at -1.6V, the Output Delay time of detector and release for the over-charge and over-discharge can be reduced.
0V-charge Selectable
Package DFN(PLP)2527-10

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R5461 Series for Consumer


  • Li-ion/Li-ion polymer protector of over-charge, over-discharge, excess discharge-current, excess charge-current for battery pack
  • High precision protectors for DSLR and any other gadgets using on board Li-ion /Li polymer battery




Technical Support

Package*1 Reliability*2
DFN(PLP)2527-10 R5461K

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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