LTC4067EDE#PBF

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Multi-Function Controller
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Fault Protection:	Over Voltage
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	12-WFDFN Exposed Pad
Supplier Device Package:	12-DFN (4x3)
Base Part Number:	LTC4067

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Introduction to LTC4067EDE#PBF

The LTC4067EDE#PBF is a battery management integrated circuit that is used for single-cell Li-Ion battery charging. It is designed specifically for USB- or wall adapter-powered portable applications and supports both constant current/constant voltage and pulse charging schemes. This IC features internal MOSFET pass elements, a thermistor input port, and a status output port, making it an ideal chip for portable device designers.

Application Field of LTC4067EDE#PBF

The LTC4067EDE#PBF is used primarily in portable electronics such as cell phones, PDAs, GPS receivers, and other USB-powered devices. This IC allows for accurate control over the charging process and includes automatic temperature monitoring, feedback loops, and safety features that ensure maximum battery performance and longevity.The LTC4067EDE#PBF provides: * A wide operating temperature range of -20°C to +85°C * A voltage range of 2.7V to 5.5V * An optimized constant current/voltage charging process * Protection against overvoltage, undervoltage, and overcurrent * A thermistor port for temperature counting * An internal MOSFET pass element * Over-discharge protection * An output port with adjustable current limiting

Working Principle of LTC4067EDE#PBF

The LTC4067EDE#PBF utilizes a constant current/constant voltage charge algorithm to charge Li-Ion batteries. It is composed of three distinct blocks: a power supply block, a control block, and a feedback loop block. The power supply block includes a low-dropout regulator, which is used to regulate the input power from the supply. This block can run from either a USB or wall adapter. The control block consists of an error amplifier, a sense resistor, a switch control block, and a safety device. The error amplifier compares the output voltage with the regulation voltage referenced in its input and adjusts the voltage accordingly. The sense resistor provides a feedback path to the control block and helps adjust the voltage or current. The feedback loop block monitors the battery voltage and temperature, ensuring proper power delivery and charge termination. This block also includes an over-discharge protection circuit that will switch off the charging process if the battery voltage drops below a set threshold. The combination of the power supply, control, and feedback loop blocks creates a highly efficient, safe, and accurate charging process for Li-ion batteries. In addition, the LTC4067EDE#PBF includes a thermistor input port that can be used to monitor the battery temperature and ensure safe charge termination.

Conclusion

The LTC4067EDE#PBF from Linear Technology is a battery management integrated circuit designed for portable device applications. Its sophisticated and intelligent controls provide an efficient and safe charging process for Li-ion batteries. This chip is an ideal choice for designers looking for a reliable and cost-effective battery management solution.

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