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RT9428 - Host-Side Single Cell Lithium Battery Gauge

General Description

The RT9428 is a compact, host-side fuel gauge IC for lithium-ion (Li+) battery-powered systems.

Key Features

  • Host-Side Fuel Gauging.
  • Precision Voltage Measurement ±7.5mV Accuracy.
  • Accurate Relative Capacity (RSOC) Calculated from Voltaic Gauge Algorithm with Temperature Compensation.
  • No Accumulation Error on Capacity Calculation.
  • No Battery Relearning Necessary.
  • No Current Sense Resistor Required.
  • External Alarm/Interrupt for Low Battery Alert.
  • I2C Compatible Interface.
  • Low Power Consumption.
  • RoHS Compliant and Halogen Free.

📥 Download Datasheet

Datasheet Details

Part number RT9428
Manufacturer Richtek
File Size 225.29 KB
Description Host-Side Single Cell Lithium Battery Gauge
Datasheet download datasheet RT9428 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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® RT9428 Host-Side Single Cell Lithium Battery Gauge General Description The RT9428 is a compact, host-side fuel gauge IC for lithium-ion (Li+) battery-powered systems. For the embedded Fuel Gauge function, the state-ofcharge (SOC) calculation is based on the battery voltage information and the dynamic difference between battery voltage and relaxed OCV, by using iteration to estimate the increasing or decreasing SOC. Voltage-based algorithm can support smoothly SOC and does not accumulate error with time and current. That is an advantage compared to coulomb counter which suffer from SOC drift caused by current-sense error and battery self-discharge. The disadvantage of voltage-based fuel gauge, it can report incremental SOC (%), but can't report capacity (mAh).