2-Cell Li-ion Battery Protection IC
The R5463 Series are high voltage CMOS-based protection ICs for over-charge/discharge of two-cell Lithium-ion (Li+) / Lithium polymer, further include a short circuit protection circuit 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 six voltage detectors, a reference unit, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. When the over-charge voltage threshold or excess-charge current threshold crosses the each detector threshold from a low value to a high value, the output of COUT pin switches to “L” level after internal fixed delay time. To release over-charge detector after detecting over-charge, the detector can be reset and the output of COUT becomes "H" when a kind of load is connected to VDD after a charger is disconnected from the battery pack and the cell voltage becomes lower than over-charge detector threshold. In case that a charger is continuously connected to the battery pack, if the cell voltage becomes lower than the over-charge released voltage, over-charge state is also released.
The output of DOUT pin, the output of the over-discharge detector and the excess discharge-current detector, switches to “L” level after internally fixed delay time, when discharged voltage crosses the detector threshold from a high value to a value lower than VDET2. To release over-discharge detector, after detecting over-discharge voltage, connect a charger to the battery pack, and when the battery supply voltage becomes higher than the over-discharge detector threshold, the over-discharge detector is released and the voltage of DOUT pin becomes “H”. If the battery is discharged lower than maximum voltage for inhibition of charger, recharge current is not acceptable.
After detecting excess-discharge current or short current, when the load is disconnected, the excess discharged or short condition is released and DOUT becomes “H”.
After detecting over-discharge voltage, supply current will be kept extremely low by halting internal circuits' operation. When the output of COUT is “H”, if V- pin level is set at -1.6V, the delay time of over-charge and over-discharge detector can be shortened. Especially, the delay time of the over-charge detector can be reduced into approximately 1/60 and test time for protection circuit PCB can be reduced. The output type of COUT and DOUT is CMOS.
Operating Input Voltage 1.5 V to 10.0 V (Maximum Rating: 12 V) Charger Negative Input Voltage -30 V Number of Cells 2 Supply Current Typ. 4.0 µA Standby Current Max. 0.1 µA Overcharge Detection Voltage 3.65 V to 4.32 V (0.005 V Steps) Overcharge Detection Voltage Accuracy ±20 mV Overcharge Detection Delay Time 1.0 s Overdischarge Detection Voltage 2.0 V to 3.2 V (0.1 V Steps) Overdischarge Detection Voltage Accuracy ±1.0% Overdischarge Detection Delay Time 128 ms Discharge Overcurrent Detection Voltage R5463K2xxxG: 0.05 V to 0.20 V (0.005 V Steps)
R5463K2xxxJ: 0.20 V to 0.40 V (0.005 V Steps)
Discharge Overcurrent Detection Voltage Accuracy R5463K2xxxG: ±10 mV
Discharge Overcurrent Detection Delay Time 12 ms Charge Overcurrent Detection Voltage -0.20 V to -0.10 V (0.005 V Steps) Charge Overcurrent Detection Voltage Accuracy ±20 mV Charge Overcurrent Detection Delay Time 8 ms Short Detection Voltage 1.0 V Short Detection Delay Time 300 µs Conditions for Overcharge Restoration Voltage Release Conditions for Overdischarge Restoration Latch Package DFN(PL)1820-6B 0 V Charge Unavailable Output Delay Time Shortening At COUT is “H”, if V- level is set at –1.6V, the Output Delay time of detect the over-charge and over-discharge can be reduced. (Delay Time for over-charge becomes about 1/60 of normal state.)
Protections / Functions
Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Sample / Buy
Buy, Request for Samples, Request for Information Materials
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|Cell Balance Function
|Cascade Connect Function
|Open Wire Detection
|Open Wire Detect Function
|Short-circuit Current Detection
|Short-circuit Current Protection
|Delay Time Shorting
|Output Delay Time Short Function
For more details, please refer to "Protecting Li-ion Batteries: Functions and Advantages".