LTC4121EUD-4.2 | Wireless Power Receiver & Li-Ion Battery Charger

Product Overview

     The LTC4121EUD-4.2#PBF is a highly integrated wireless power receiver and single-cell Li-Ion battery charger from Analog Devices. Designed for compact, sealed, and cable-free products, it converts AC power from a wireless transmitter into regulated DC power to efficiently charge a 4.2V Li-Ion battery. By integrating rectification, regulation, and battery charging control, the LTC4121 significantly reduces external components and BOM complexity, making it ideal for low-power industrial, medical, and consumer devices.

Key Features

• Integrated wireless power receiver
• Single-cell Li-Ion battery charger (4.2V regulation)
• Eliminates physical charging connectors
• High efficiency rectification and regulation
• Integrated charge control and protection
• Programmable charge current (design-dependent)
• Supports compact and sealed product designs
• Low external component count
• Compact QFN / UDFN (EUD) package
• Industrial temperature range
• Lead-free #PBF package
• RoHS compliant

Applications

• Wireless-powered IoT devices
• Sealed industrial sensors
• Medical and wearable electronics
• Portable consumer products
• Backup power and energy harvesting systems
• Devices requiring cable-free charging

Electrical Summary