1-Cell Li-ion Battery Second Protection IC
The R5458 is a high voltage tolerant CMOS-based overcharge secondary protection IC for 1-Cell Li-ion or Li-polymer battery. The R5458 monitors the cell batteries and protects them from overcharge conditions.
Internally, the R5458 consists of a voltage detector, a voltage reference unit, an oscillator, a counter, a delay circuit, and a logic circuit.
The cell is monitored for overcharging condition and triggers an internal counter once the overcharge threshold is exceeded. After the overcharge detection delay time, the output of COUT is transitioned to a high level. The output of COUT goes low if the cell voltage drops below the overcharge release voltage. The output type of the COUT pin is CMOS. The R5458 is offered in a small 6-pin DFN1814-6C package.
Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V) Number of Cells 1 Supply Current Typ. 1.5 µA Standby Current Max. 0.5 µA Overcharge Detection Voltage 4.00 V to 4.70 V (0.005 V Steps) Overcharge Detection Voltage Accuracy ±20 mV Overcharge Detection Delay Time 2 s Package DFN1814-6C
Protections / Functions
Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening
R1: 330 Ω, C1: 0.1 µF
- 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
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
|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".