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RT9422A - Pack Side Single Cell Fuel Gauge

General Description

The RT9422A Li-Ion/Li-Polymer battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell battery packs.

The RT9422A resides within the battery pack and manages a non-removable battery or removable battery pack.

Key Features

  • of the RT9422A can be used to indicate more serious faults via the SAFE pin. This pin can be used to blow an in-line fuse to permanently disable the battery pack from charging or discharging. The SAFE pin also can used to detect secondary protection IC status and log battery status in the NVM when protection be triggered. To prevent battery pack cloning, the RT9422A integrates SHA-1/HMAC authentication with a 128-bit secret key. Features.
  • Support Pack Side Fuel Gauging.
  • Battery Fuel G.

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Datasheet Details

Part number RT9422A
Manufacturer Richtek
File Size 1.11 MB
Description Pack Side Single Cell Fuel Gauge
Datasheet download datasheet RT9422A 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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RT9422A Pack Side Single Cell Fuel Gauge General Description The RT9422A Li-Ion/Li-Polymer battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell battery packs. The RT9422A resides within the battery pack and manages a non-removable battery or removable battery pack. The RT9422A reports StateOfCharge, StateOfHealth, FullChargeCapacity, TimeToEmpty and CycleCount based on the Voltaic Gauge with Current Sensing (VGCS) algorithm by using the voltage difference between battery voltage and OCV to calculate the increasing or decreasing SOC, with current sensing compensation to report battery SOC. Voltaic Gauge with Current Sensing algorithm can support smoothly SOC and does not accumulate error with time and current.