Electronics Maker
  • Home
  • Electronics News
  • Articles
  • Magazine
  • Events
  • Interview
  • Electronics Projects
No Result
View All Result
  • Home
  • Electronics News
  • Articles
  • Magazine
  • Events
  • Interview
  • Electronics Projects
No Result
View All Result
Electronics Maker
No Result
View All Result
Home Electronics News

Tiny Wireless NiMH Charger-Receiver Optimized for Space-Constrained Hearing Aid Applications

Electronics Maker by Electronics Maker
December 17, 2015
in Electronics News
0
0
SHARES
26
VIEWS
Share on FacebookShare on Twitter

MILPITAS, CA – December 16, 2015 – Linear Technology Corporation introduces the LTC4123 to further expand its offerings in wireless battery charging. The LTC4123 combines a 30mW wireless receiver with a constant-current/constant-voltage linear charger for NiMH batteries, such as Varta’s power one ACCU plus series. An external resonant LC tank connected to the LTC4123 enables the IC to receive power wirelessly from an alternating magnetic field generated by a transmit coil. Integrated power management circuitry converts the coupled AC current into the DC current required to charge the battery. Wireless charging with the LTC4123 allows for a completely sealed product and eliminates the need to constantly replace primary batteries. Zn-Air (Zinc-Air) detection allows applications to work interchangeably with both rechargeable NiMH batteries and primary Zn-Air batteries with the same application circuit. Both battery types can directly power a hearing aid ASIC without the need for additional voltage conversion. By contrast, a 3.7V Li-ion battery requires a step-down regulator in addition to the LTC4123’s functionality to power the ASIC.

Linear-LTC4123The LTC4123 rectifies AC power from the receive coil, and can also accept a 2.2V to 5V input to power a full-featured constant-current/constant-voltage battery charger. Features of the charger include programmable charge current up to 25mA, a single-cell 1.5V battery charge voltage with ±0.5% accuracy, charge status indication and an onboard safety charge termination timer. A temperature-compensated charge voltage protects the NiMH battery and prevents overcharging. The LTC4123 prevents charging when batteries are inserted with reverse polarity and pauses charging if the temperature becomes too hot or too cold.

The LTC4123 is housed in a highly compact, low profile (0.75mm) 6-pin 2mm x 2mm DFN package with backside metal pad for excellent thermal performance. The device is guaranteed for operation from -20°C to 85°C in E grade, and 1,000-piece pricing starts at $2.65 each.

Summary of Features: LTC4123

  • Complete Low Power Wireless NiMH Charger
  • Low Minimum Input Voltage: 2.2V
  • 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 x 2mm DFN package
Tags: Semiconductor & IC
Electronics Maker

Electronics Maker

Subscribe Newsletter

Subscribe to our mailing list to receives daily updates direct to your inbox!

*we hate spam as much as you do

Electronics Maker

It is a professionally managed electronics print media with highly skilled staff having experience of this respective field.

Subscribe Newsletter

Subscribe to our mailing list to receives daily updates direct to your inbox!

*we hate spam as much as you do

Quick Links

  • »   Electronics News
  • »   Articles
  • »   Magazine
  • »   Events
  • »   Interview
  • »   About Us
  • »   Contact Us

Contact Us

EM Media LLP
  210, II nd Floor, Sager Plaza – 1, Road No-44,, Plot No-16, Pitampura, New Delhi - 110034
  01145629941
  info@electronicsmaker.com
  www.electronicsmaker.com

  • Advertise with Us
  • Careers
  • Terms Of Use
  • Privacy Policy
  • Disclaimer
  • Cookie Policy

© 2020 Electronics Maker. All rights reserved.

No Result
View All Result
  • Home
  • Electronics News
  • Articles
  • Magazine
  • Events
  • Interview
  • Electronics Projects

© 2020 Electronics Maker. All rights reserved.