The Evaluation Kit features the MC34674, which is a fully integrated single-cell Li-Ion and Li-Polymer battery charger optimized for travel charger applications. The few external components required include a dual-color LED for charge-status indication, a negative-temperature-coefficient (NTC) thermistor circuit for setting the charge temperature window, and two decoupling capacitors.
The MC34674 tolerates an input voltage up to 28V, which allows low-cost ac/dc converters to be used for further system-cost reduction. A charge cycle of the MC34674 includes trickle, constant-current (CC) and constant-voltage (CV) charge modes. The CC-mode current is selectable from 50mA to 1.05A, with 10% accuracy and the constant-output voltage in the CV-mode is fixed at 4.2V.
The MC34674 has many features such as trickle charging for a deeply-discharged battery, an internal timer for termination to prevent charging a failed battery, charger current thermal foldback for thermal protection, and smart battery-connection verification to prevent charging in case there is no battery connected. It has a 2.6V falling power-on-reset (POR) threshold, making it perfect to work with current-limited power supplies. When the charger is disabled, the BAT pin leaks less than 1µA current from the battery.
|Get Started with the KIT34674EPEVBE Evaluation kit|
“Everything you need to get started with the
“Everything you need to get started with the KIT34674EPEVBE Evaluation Kit”.
MC34674, High Input Voltage Travel Charger for Single-cell Li-Ion Batteries
Provides electrical characterization, packaging and application information.
Type: Data Sheets Format: pdf Size: 583K
MC34674FS, Industry's most flexible battery charger solution
Contains a brief product description.
Type: Fact Sheets Format: pdf Size: 266K
KIT34674EPEVBE, Using the High-Input-Voltage Travel Charger for Single Cell Li-Ion Batteries - User Guide
Contains set up, BOM, Schematics and how to use the kit.
Type: Users Guides Format: pdf Size: 260K
KIT34674EPGRBR: Gerber files for the KIT34674EPEVBE Evaluation board
Contains drill files, pcb layers/layout, silk screens, etc. (unZip with WinZip)
Type: Printed Circuit Boards and Schematics Vendor: NXP