MAX8818AETM+

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Function:	Power Management
Battery Chemistry:	--
Number of Cells:	--
Fault Protection:	--
Interface:	--
Operating Temperature:	--
Package / Case:	48-WFQFN Exposed Pad
Supplier Device Package:	48-TQFN-EP (6x6)
Base Part Number:	MAX8818

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Power Management Integrated Circuits (PMICs) are important components in a variety of systems, providing constant and efficient power supply so that the system can operate at maximum performance. The MAX8818AETM+ is a single-cell linear charger PMIC that provides complete solutions for advanced, variable-output Li+ battery management.

MAX8818AETM+ Features

• Wide Supply Range: Input voltage range from 2.7V to 6.5V
• Automatic Three Step Constant-Current/Constant-Voltage Charging
• Maximum Charge Current Programmable to 1A
• Charge Status Output
• Trickle Charge and Float Charge Adjustable
• Termination Voltage Adjustable from 3.9V to 4.4V
• Low Quiescent Current
• Fault Regulation
• CE Marked

MAX8818AETM+ Applications

The MAX8818AETM+ application field includes GPS, PDA, digital still camera, and other types of battery-powered portable devices. The low quiescent current allows the device to remain in a low-power sleep mode while still allowing automatic charging when the device is turned on.

MAX8818AETM+ Working Principle

The MAX8818AETM+ linear charger works on the principle of three step constant current/constant voltage charging. It is designed to automatically detect the type of battery in use and deliver the correct charging voltage and current for optimal charging performance. In the first step, the charger detects the type of battery being charged, and applies the correct charge current for faster and more efficient charging. The current is based on the voltage and the device\'s internal timer. This stage is known as the fast charge stage, as the charge current is increased gradually until the set maximum threshold is reached. In the second step, the device enters constant voltage (CV) mode when the charge current has dropped to the set trickle-charge threshold. During this stage, the charger maintains a constant voltage across the battery, while the charge current decreases further. This allows the battery to achieve a full state of charge with no overcharging. Finally, the MAX8818AETM+ enters condiction mode, where the charger maintains a float voltage across the battery. This ensures that the battery maintains a full charge, while preventing overcharging. In conclusion, the MAX8818AETM+ is an advanced and efficient single-cell linear charger with adjustable trickle charge and float charge for optimal charging performance. It is the perfect choice for applications such as GPS, PDA, digital still camera and other types of battery-powered portable devices.

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