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The R5459 is a high voltage tolerant CMOS-based overcharge secondary protection IC for 1-Cell Li-ion or Li-polymer battery. The R5459 monitors the cell batteries and protects them from overcharge conditions. Internally, the R5459 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 R5459 is offered in a small 6-pin DFN1814-6C package.
Specs & Datasheets
|Operating Input Voltage||1.5 V to 5.0 V (Maximum Rating: 12 V)|
|Number of Cells||1|
|Supply Current||Typ. 1.8 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 (Ta = 25°C)
±25 mV (Ta = 0°C to 60°C)
|Overcharge Detection Delay Time||280 µs|
|Temperature Protection||Reset||Alarm||Cell Balance||Cascadable||Open Wire Detection||Wakeup||Short-circuit Current Detection||Delay Time Shortening|
Quality & Packages
Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.
Sample / Buy
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
|Temperature Protection||Temperature Protection|
|Cell Balance||Cell Balance Function|
|Cascadable||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 "Externally Configurable Protections and Their Advantages".