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BQ24618RGER
Stand-Alone USB-Friendly Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger
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bq24618SLUSA55B –OCTOBER 2010–REVISED APRIL 2015
bq24618 Stand-Alone USB-Friendly Synchronous Switched-Mode Li-Ion or Li-Polymer
Battery Charger With System Power Selector and LowIq Features 2 Applications USB-Friendly 4.7-Vto 28-V Input Operating • Tablet PCs
Range Smart Phones Stand-Alone Charge Controllerto Support1to6 Portable Media Players, Navigation Devices,
Li-Ionor Li-Polymer Battery Cells Notebooks and Ultra-Mobile PCs Upto 10-A Charge Current and Adapter Current Personal Digital Assistants 600-kHz NMOS-NMOS Synchronous Buck Handheld Terminals
Converter Industrial and Medical Equipment High-Accuracy Voltage and Current Regulation
Description– ±0.5% Charge Voltage Accuracy bq24618 deviceis highly integrated Li-ionor Li-– ±3% Charge Current Accuracy switched-mode battery-charge controller.– ±3% Adapter Current Accuracy bq24618 offers a constant-frequency• Integration switching PWM controller with high- charge current and voltage regulation,– Automatic System Power Selection From preconditioning, termination, adapter currentAdapteror Battery and charge status monitoring.– Internal Loop Compensation bq24618 operates from eithera USB portor AC– Internal Soft Start and supports charge currentsupto10A. The– Dynamic charges the battery in three phases:• Safety Protection constant current, and constant Charge is terminated when the current– Input Overvoltage a minimum user-selectable level. A– Battery charge timer providesa safety backupSuspend charge termination. The bq24618 automatically– Battery the charge cycleif the battery voltage falls an internal threshold, and entersa low-– Reverse-Protection current sleep mode when the input voltage– Programmable below the battery voltage.– Charge
Device Information(1)– Battery– Battery– Thermal Forall available packages, see the orderable addendumat• Status the endofthe data sheet.– Adapter Status
Simplified Schematic Buck Converter MaximumIq Current
