LTC4123
RECOMMENDED FOR NEW DESIGNSLow Power Wireless Charger for Hearing Aids
- Part Models
- 2
- 1ku List Price
- Starting From $4.03
Overview
- Complete Low Power Wireless NiMH Charger
- Low Minimum Input Voltage: 2.2V
- Small Total Solution Volume
- 1.5V, 25mA Linear Single-Cell NiMH Charger
- Temperature Compensated Charge Voltage
- Integrated Rectifier with Overvoltage Limit
- Zinc-Air Battery Detection
- Reverse Polarity Protection
- Thermally Enhanced 6-Lead (2mm × 2mm) DFN package
The LTC4123 is a low power wireless receiver and a constant-current/constant-voltage linear charger for NiMH batteries. An external programming resistor sets the charge current up to 25mA. The temperature compensated charge voltage feature protects the NiMH battery and prevents overcharging.
Wireless charging with the LTC4123 allows products to be charged while sealed within enclosures and eliminates bulky connectors in space constrained environments. The LTC4123 also makes it possible to charge NiMH batteries used in moving or rotating equipment.
The LTC4123 prevents charging of Zinc-Air batteries as well as batteries inserted with reverse polarity. The LTC4123 pauses charging if its temperature is too hot or too cold. An internal timer provides time-based charging termination.
The 2mm × 2mm DFN package and low external component count make the LTC4123 well-suited for hearing aid applications or other low power portable devices where small solution size is mandatory.
Applications
- Hearing Aids
- Smart Cards
- Fitness Devices
- Moving and/or Rotating Equipment
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Product Selector Card 1
Rarely Asked Question 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4123EDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC4123EDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Oscillators 1 | ||
| LTC6990 | PRODUCTION | TimerBlox: Voltage Controlled Silicon Oscillator |
| Parts | Product Life Cycle | Description |
|---|---|---|
|
LTC4120 LTC4120-4.2 |
Wireless Power Receiver and 400mA Buck Battery Charger |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4123
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
