Battery Charger is designed for single cell Li+ batteries.
Press Release Summary:
Housed in 2 x 2 mm TDFN package, 28 V rated MAX8814 for 1-cell Li+ batteries integrates temperature and constant-current, constant-voltage (CCCV) regulation circuitry to eliminate overheating during fast-charging. Specified over -40 to +85°C extended temperature range, it has overvoltage-protection circuitry as well as autobooting circuit that monitors system-booting signal and input-power status.
Original Press Release:
Industry's First 28V, Single-Input Battery Charger Is Smallest, Safest Charging Solution for Handhelds
2mm x 2mm, 28V Single-Input Charger for 1-Cell Li+ Batteries
o The MAX8814 is the first 28V-rated, single-input lithium-ion charger in a 2mm x 2mm TDFN package.
o This device utilizes proprietary temperature and constant-current, constant-voltage (CCCV) regulation to prevent the IC from overheating while fast-charging.
o To provide the smallest solution size, the MAX8814 integrates overvoltage-protection (OVP) circuitry and an autobooting assistant circuit.
o The MAX8814 is the simplest, safest, and smallest charging solution for handheld equipment.
SUNNYVALE, CA-March 31, 2008-Maxim Integrated Products (Pink Sheets: MXIM) introduces the MAX8814, the first 28V-rated, single-input charger for single-cell lithium-ion (Li+) batteries. Requiring only 4mm² of board space, this device integrates Maxim's proprietary temperature and constant-current, constant-voltage (CCCV) regulation circuitry to eliminate overheating during fast-charging and to simplify hardware design. A robust solution, the MAX8814 features overvoltage-protection circuitry that enables it to withstand input transients up to 28V. The robustness and integration of this tiny charger make it ideal for use in cell phones, smartphones, USB applications, Bluetooth® devices, and other handheld equipment in which safety, charging speed, and size are of significant concern.
The high integration of the MAX8814 considerably simplifies solution implementation, while providing the best savings in both space and BOM cost. This device eliminates the need for a bulky external FET, reverse-blocking diode, current-sense resistor, and thermal-regulation circuitry. Using its CCCV circuitry, the IC intelligently controls the charging sequence from the prequalification state, through constant-current fast-charging, to the final constant-voltage charge. To enhance flexibility, the MAX8814 allows fast-charge current adjustment through an external resistor. Additionally, it features an autobooting circuit that monitors the system-booting signal and input-power status, and provides an enable signal to start system operation.
Packaged in a tiny, 2mm x 2mm, 8-pin TDFN, the MAX8814 is fully specified over the -40°C to +85°C extended temperature range. Prices start at $1.15 (2500-up, FOB USA). An evaluation kit is available to speed designs.
Maxim Integrated Products, a two billion dollar company, designs and manufactures ICs for analog and mixed-signal applications. The company's broad portfolio of 28 product categories is among the industry's deepest, with over 5400 products.
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