Features and Benefits
- Complete Wireless Power Receiver, Li-Ion Charger and PowerPath™ Controller
- Wireless Input Power Control and Rectification
- Wideband Wireless Power Frequency: DC to >10MHz
- Pin-Selectable Charge Current: 10mA/25mA/50mA/100mA
- Pin-Selectable Charge Voltage: 4.0V/4.1V/4.2V/4.35V
- Pin-Selectable Low Battery Disconnect: 2.7V/3.2V
- Zero Battery Drain Current in Disconnect/Ship Mode
- Pin-Selectable Low Battery Pre-Charge Current Enable
- NTC Input for Temperature Qualified Charging
- Safety Charge Termination Timer
- Tiny Total Solution Size with Few Externals
- Small Thermally Enhanced 12-lead 2mm × 2mm LQFN Package
The LTC4124 is a simple high performance wireless Li-Ion charger with low battery disconnect. The pin-selectable charge current (up to 100mA) and charge voltage ensure versatility while minimizing the number of required external components.
Wireless charging with the LTC4124 allows devices to be charged while sealed within enclosures and eliminates bulky connectors in space-constrained applications. Elimination of exposed conductive connectors also creates more robust devices while ensuring an effortless end-user experience.
The LTC4124 includes an NTC input for safe temperature qualified charging and a battery disconnect feature that prevents damage to a battery due to over-discharging.
The 2mm × 2mm LQFN package and minimal number of external components make the LTC4124 well-suited for low power portable applications where small solution size is mandatory.
- Medical Wireless Sensors
- Military Wearables
- High End Wireless Headsets
- Streaming Headsets with Bluetooth Connectivity
- Virtual Reality Headsets
- High End Remote Control
- IoT Devices
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (4)
DC2770A-B-KIT is a kit of the DC2773A-B transmitter board (featuring LTC4125) and the DC2775A-D (featuring LTC4124). The DC2775A-D receiver board can charge a single Li-Ion battery at up to 100 mA with an air gap of 3.0 mm to 5.0 mm between the transmit and receive coils. The DC2773A-B transmitter supports Optimum Power Search and Foreign Object Detection features via LTC4125.
DC2770A-A-KIT is a kit of the DC2773A-A transmitter board (featuring LTC4125) and the DC2775A-C (featuring LTC4124). The DC2775A-C receiver board can charge a single Li-Ion battery at up to 50 mA with an air gap of 3.0 mm to 5.0 mm between the transmit and receive coils. The DC2773A-A transmitter board supports Foreign Object Detection via the LTC4125.
DC2769A-A-KIT is a kit of the DC2771A-A transmitter board, featuring LTC6990, the DC2775A-A, featuring LTC4124, and the DC2774A application-sized receiver board featuring LTC4124. The DC2775A-A receiver can charge a single Li-Ion battery at up to 10mA with an air gap of 0.5mm between the transmit and receive coils.
DC2769A-B-KIT is a kit of the DC2771A-B transmitter board, featuring LTC6990 and the DC2775A-B, featuring LTC4124. The DC2775A-B receiver can charge a single Li-Ion battery at up to 25mA with an air gap of 2mm to 5mm between the transmit and receive coils.
Documentation & Resources
Tools & Simulations
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.