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RT9451 - Switch-Mode Single Cell Li-ion Battery Charger

Datasheet Summary

Description

The RT9451 integrates a high efficiency USB friendly switch mode charger with On-The-Go (OTG) support for single cell Li-ion and Li-polymer batteries, D+D

detection, and a 50mA LDO regulator into a single chip.

Features

  • a synchronous 375kHz PWM controller with integrated power MOSFETs, input current sensing and regulation, Minimum Input Voltage Regulation (MIVR), high accuracy charge current and voltage regulation, and charge termination. It charges the battery in three phases : low current pre-charge, constant current fast charge, and constant voltage trickle charge. The input current is automatically limited to the value set by the host. The charger can be configured to terminate charge based on user-selectab.

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Datasheet preview – RT9451

Datasheet Details

Part number RT9451
Manufacturer Richtek Technology
File Size 317.88 KB
Description Switch-Mode Single Cell Li-ion Battery Charger
Datasheet download datasheet RT9451 Datasheet
Additional preview pages of the RT9451 datasheet.

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Full PDF Text Transcription

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® RT9451 Switch-Mode Single Cell Li-ion Battery Charger with USB OTG General Description The RT9451 integrates a high efficiency USB friendly switch mode charger with On-The-Go (OTG) support for single cell Li-ion and Li-polymer batteries, D+D− detection, and a 50mA LDO regulator into a single chip. The charger features a synchronous 375kHz PWM controller with integrated power MOSFETs, input current sensing and regulation, Minimum Input Voltage Regulation (MIVR), high accuracy charge current and voltage regulation, and charge termination. It charges the battery in three phases : low current pre-charge, constant current fast charge, and constant voltage trickle charge. The input current is automatically limited to the value set by the host.
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