Datasheet Linear Technology LTC4123 — Datenblatt

LTC4123
Low Power
Wireless Charger for Hearing Aids
Features Description Complete Low Power Wireless NiMH Charger
nn Low Minimum Input Voltage: 2.2V
nn Small Total Solution Volume
nn 1.5V, 25mA Linear Single-Cell NiMH Charger
nn Temperature Compensated Charge Voltage
nn Integrated Rectifier with Overvoltage Limit
nn Zinc-Air Battery Detection
nn Reverse Polarity Protection
nn Thermally Enhanced 6-Lead (2mm × 2mm)
DFN package The LTC®4123 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. Applications 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. nn Wireless charging with the LTC4123 allows products to
be charged while sealed within enclosures and eliminates
bulky connectors in space constrained environments. The …