Analog Devices Inc. LT3650IDD-4.2#PBF Overview

The LT3650IDD-4.2#PBF is a high-efficiency, 4.2V fixed output, standalone linear charger for single-cell lithium-ion batteries produced by Analog Devices Inc. This advanced charging device is designed to provide a safe and reliable solution for a wide range of battery charging applications, including portable consumer electronics, medical devices, and industrial equipment.

Featuring a compact design, the LT3650IDD-4.2#PBF is housed in a low-profile (0.75mm) 10-lead DFN package with a 3mm x 3mm footprint, making it an excellent choice for space-constrained applications. It is capable of delivering up to 2A of continuous charge current, which can be programmed via a single resistor. This flexibility allows the charger to accommodate various battery sizes and desired charge times.

Key Features

• Fixed 4.2V Charge Voltage with ±0.5% Accuracy
• Programmable Charge Current Up to 2A
• Wide Input Voltage Range: 4.95V to 32V
• No VIN(DC) Overvoltage Lockout
• Programmable C/10 Charge Termination
• NTC Thermistor Input for Temperature-Qualified Charging
• Automatic Recharge Feature
• Charge Status Output Pin
• Thermal Regulation and Protection
• Reverse Battery Protection

Charging Safety and Efficiency

The LT3650IDD-4.2#PBF incorporates a precise end-of-charge control, which terminates the charge cycle when the charge current falls below one-tenth of the programmed value. To ensure the battery is always kept in optimal condition, the device also features an automatic recharge function. Safety is further enhanced with thermal regulation, which prevents overheating by reducing charge current during high temperature conditions. The charger also includes an NTC thermistor input that allows for temperature-qualified charging, ensuring the battery is charged within its safe temperature range.

With its robust set of features and protections, the LT3650IDD-4.2#PBF from Analog Devices Inc. is a highly dependable and versatile charging solution that is well-suited for modern electronic devices requiring efficient power management and long battery life.