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RT9490 - 5A 2-4 Cell Buck-Boost Switching Battery Charger

General Description

The RT9490 is a highly-integrated 5A Buck-Boost switch mode battery charge management and system power path management device for 2-4 cell Li-Ion and Li-polymer battery.

Key Features

  • High Efficiency, 750kHz/1MHz/1.5MHz Programmable Frequencies, Synchronous Switch-Mode Buck-Boost Charger.
  • 96.7% Charge Efficiency at 2A with 9V Input and 8V Battery.
  • Supports 3.6V to 24V Input Voltage Range.
  • Average Input Current Regulation (AICR).
  • Minimum Input Voltage Regulation (MIVR).
  • Supports USB On-The-Go (OTG).
  • 93.8% OTG Efficiency at 2A with 8.4V Battery and 5V Output.
  • Output Voltage with 10mV resolution to support USB-PD.
  • BAT Current Limit R.

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Datasheet Details

Part number RT9490
Manufacturer Richtek
File Size 1.73 MB
Description 5A 2-4 Cell Buck-Boost Switching Battery Charger
Datasheet download datasheet RT9490 Datasheet

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Full PDF Text Transcription (Reference)

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RT9490 5A 2-4 Cell Buck-Boost Switching Battery Charger General Description The RT9490 is a highly-integrated 5A Buck-Boost switch mode battery charge management and system power path management device for 2-4 cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution. The recommended junction temperature range is −40C to 130C, and the ambient temperature range is −40C to 85C. Ordering Information RT9490 Package Type WSC: WL-CSP-56B 2.93x3.