LTC4089EDJC-5#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Timer
Fault Protection:	--
Charge Current - Max:	--
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	5.5V, 36V
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	22-WFDFN Exposed Pad
Supplier Device Package:	22-DFN (6x3)
Base Part Number:	LTC4089

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LTC4089EDJC-5#TRPBF Application Field and Working Principle

Power Management Integrated Circuit (PMIC) devices are highly advanced integrated circuits specially designed to control power management. The LTC4089EDJC-5#TRPBF from Linear Technology Corporation is a PMIC device used in battery chargers, enabling increased battery life, safety, and efficiency. This article looks at the application field and working principle of the LTC4089EDJC-5#TRPBF battery charger.

Application Field

The LTC4089EDJC-5#TRPBF is a high performance and cost effective battery charger, suited to a wide range of applications such as industrial equipment, medical and telecom applications, consumer electronics, solar-powered applications, and automotive systems. This device does away with the need for additional MOSFETs and external current sensing elements, as it features high efficiency up to 95%. The device integrates dedicated battery pre-conditioning and low voltage disconnect circuits, along with safety features such as input overvoltage protection and output current protection. The device can operate either in pulse-width modulation (PWM) or constant current/constant voltage (CC/CV) modes.

Working Principle

The LTC4089EDJC-5#TRPBF integrates a synchronous buck converter, followed by a charge pump architectural structure. The device derives its input voltage from an external voltage source, and converts the voltage to a regulated output for charging the battery.The charge pump works in the same basic manner as a buck converter, but with an additional circuit element, a large storage capacitor. The battery charger stores energy from the input source in the storage capacitor, then uses the stored energy to regulate the output voltage and current. This helps to reduce the input power requirements while maintaining a proper charge rate.The switching frequency of the LTC4089EDJC-5#TRPBF can be adjusted using an external clock signal, allowing engineers to optimize the system\'s performance. The device\'s output current and voltage can also be set using an internal resistor network, and supports charge current programmability and temperature regulation.

Conclusion

The LTC4089EDJC-5#TRPBF from Linear Technology is a versatile PMIC device suited to a variety of applications. It integrates a synchronous buck converter and a charge pump structure, making it highly efficient in battery charging. The device can be programmed with an external clock signal for frequency optimization, and can be set for output current and voltage with an internal resistor network. With its integrated safety features, the device ensures enhanced battery life, efficiency, and safety.

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