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reference designLTC4123

Analog Devices LTC4123

Low Power Wireless Charger for Hearing Aids

Overview

TopologyWireless Power Transfer
Input voltage5 V
IC revisionA

Description

The LTC®4123 is a low power wireless receiver and aconstant-current/constant-voltage linear charger for NiMHbatteries. An external programming resistor sets the chargecurrent up to 25mA. The temperature compensated chargevoltage feature protects the NiMH battery and preventsovercharging.

Features

Complete Low Power Wireless NiMH Chargernn Low Minimum Input Voltage: 2.2Vnn Small Total Solution Volumenn 1.5V, 25mA Linear Single-Cell NiMH Chargernn Temperature Compensated Charge Voltagenn Integrated Rectifier with Overvoltage Limitnn Zinc-Air Battery Detectionnn Reverse Polarity Protectionnn Thermally Enhanced 6-Lead (2mm × 2mm)DFN package

Typical applications

  • Hearing Aids
  • Moving and/or Rotating Equipment
  • Fitness Devices
  • Smart Cards

More information

Products

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IR(A)
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SamplesAvailability & Sample
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760308103206
SPECWE-WPCC Wireless Power Transfer Receiver Coil, Qi - Airfuel Alliance, 28,9 x 15,7 x 0,76 mm
Simu­lation
Availability
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-WPCC Wireless Power Transfer Receiver Coil
ComplianceQi - Airfuel Alliance 
Size28,9 x 15,7 x 0,76 mm 
Inductance7.5 µH
Rated Current1.55 A
DC Resistance380 mΩ
Self Resonant Frequency23 MHz
Q-Factor16 
Power Capability [1]20 W
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760308101208
SPECWE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 10 x 1.6 mm
Simu­lation
Availability
–
Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-WPCC Wireless Power Transfer Receiver Coil
Complianceworks with Qi Rx IC's 
SizeØ 10 x 1.6 mm 
Inductance13 µH
Rated Current0.8 A
DC Resistance500 mΩ
Self Resonant Frequency26 MHz
Q-Factor17 
Power Capability [1]15 W
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