Features and Benefits
- Programmable Input Current Limit:
- Single Resistor at CLPROG Pin to Set and Monitor Input Current
- Battery Charger/Ideal Diode/Controller:
- 13V Overvoltage Protection
- Full Featured Battery Charger with 4.2V Float
- Up to 1.25A Programmable Charge Current
- Thermal Regulation Maximizes Charge Current Without Risk of Overheating
- Internal 2 Hour Termination Timer from Onset of Voltage Mode Charging
- Automatic Load Switchover to Battery Power with Internal Ideal Diode and Drive Output for Optional External MOSFET
- NTC Thermistor Input
- Bad Battery Time-Out Detection
- 4mm × 3mm 12-Lead DFN Package
The LTC4067 is a USB power management and Li-Ion/ Polymer battery charger designed for portable battery powered applications. The part controls total current used by the USB peripheral for operation and battery charging. The total input current may be left unregulated, or it may be limited to 20% or 100% of the programmed value up to 1.5A (typically 500mA). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current.
With the addition of an external P-channel MOSFET the LTC4067 can withstand voltages up to 13V.
The LTC4067 includes a complete constant current/constant voltage linear charger for single cell Li-Ion batteries. The float voltage applied to the battery is held to a tight 0.4% tolerance, and charge current is programmed using an external resistor to ground. An end-of-charge status output, CHRG, indicates full charge. Also featured is an NTC thermistor input used to monitor battery temperature while charging.
The LTC4067 is available in a 12-lead low profile 4mm × 3mm DFN package.
- Automatic Battery Charging/Load Switchover
- Backup Battery Charger
- Uninterrupted Supplies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 943 is a complete power controller for a USB power device. It features the LTC6047 and provides a full-featured 1.25A linear lithium-ion CC/CV battery charger with timer termination and 4.2V charge voltage, a USB power manager, and a PowerPath manager for the battery. The USB input voltage range is 4.35V to 5.5V and the wall adapter input is 4.35V to 6V. It also features a programmable 1.5A input current limit that can be set at 500mA or 100mA for USB applications.
The wall adapter input has overvoltage protection up to 13V. An external MOSFET disconnects the wall adapter when the voltage exceeds 6V.
Product Selector Card (1)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.