Product Summary

The LC709204F is a level detection IC for 1-cell Lithium-ion/Polymer batteries. Using a unique algorithm called HG-CVR2, the device measures the relative remaining capacity of the battery even under unstable conditions such as battery temperature change, load, aging, and self-discharge. You can accurately measure the volume (RSOC).

It also supports battery safety with alarm function and SOH (State of Health) report. And the operating current consumption is as low as 2uA, making it suitable for applications such as wearable devices.

Main features/functions

・HG-CVR2 algorithm technology
- No current sensing resistor required
- Achieve accurate RSOC for aging batteries
- Stable measurement with automatic error convergence
- Accurate measurement is possible immediately after inserting the battery

·Low power consumption
-2uA working mode current

・Battery safety improvement with alarm function
-RSOC/ voltage / temperature

・Battery life measurement
-SOH/ cycle count / operating time

・Time estimation
- Time to full charge/time to empty

・Three temperature inputs
- Input terminal for sensing two​ ​NTC thermistors
- Via 1​ ​I2C​

・Detection of battery operating conditions for charging/discharging

・Battery insertion detection

・I2C interface (supports up to 400kHz)

Low power consumption

The LC709204F monitors battery charge/discharge status and changes the sampling rate in response to changes in current. This method reduces power consumption without compromising RSOC accuracy. Shown below is a comparison of current consumption with other companies' products. The current consumption of the LC709204F during operation is only 2uA, which is extremely low compared to other companies' products.

High precision

Competitor's products have a high gauging error rate at low temperatures.
On the other hand, Onsemi's LC709204F reduces gauging errors at low temperatures.

No current sensing resistor required

Below is the application diagram. Since an external resistor for current detection is not required, the number of mounted components can be reduced.
In addition, by reducing the mounting area on the printed circuit board, we will improve the designability of the product and improve the cost advantage.

Internal block diagram

Application example

・Wearable/IoT devices
·smartphone
・Wireless headset/portable headset
・Portable game player
・USB related devices

Inquiry / Quotation

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