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reference designLTC4124

Analog Devices LTC4124

100mA Wireless Li-Ion Charger with Low Battery Disconnect

Overview

TopologyWireless Power Transfer
Input voltage3.3-5.5 V
Switching frequency50-10000 kHz
Output 13.4 V / 0.1 A
IC revisionA

Description

The LTC®4124 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 numberof required external components.

Features

  • 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-lead2mm × 2mm LQFN Package

Typical applications

  • Medical Wireless Sensors
  • Military Wearables, High End Wireless Headsets, Streaming Headsets with Bluetooth Connectivity, Virtual Reality Headsets, High End Remote Control, IoT Devices

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Compliance
Size
L(µH)
IR(A)
RDC max.(mΩ)
fres(MHz)
Q(%)
P(W)
Samples
760308101208
WE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 10 x 1.6 mm
Simu­lation
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

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
760308101216
WE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 6 x 2 mm
Simu­lation
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-WPCC Wireless Power Transfer Receiver Coil
Complianceworks with Qi Rx IC's 
SizeØ 6 x 2 mm 
Inductance7.2 µH
Rated Current0.8 A
DC Resistance450 mΩ
Self Resonant Frequency32 MHz
Q-Factor10 %
Power Capability [1]5 W
760308101220
WE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 17 x 0.8 mm
Simu­lation
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-WPCC Wireless Power Transfer Receiver Coil
Complianceworks with Qi Rx IC's 
SizeØ 17 x 0.8 mm 
Inductance12.6 µH
Rated Current1.1 A
DC Resistance360 mΩ
Self Resonant Frequency19 MHz
Q-Factor20 %
Power Capability [1]20 W