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Battery charger solution requires no MCU, firmware programming

Posted: 12 Aug 2005     Print Version  Bookmark and Share

Keywords:linear technology  battery charger  ltc4011 

Linear Technology Corp. has unveiled a complete NiMH/NiCd battery charger solution without any microcontroller or firmware programming required. The new LTC4011 includes charge initiation, monitoring, protection, charge termination and constant current control circuitry for an autonomous charger solution. The IC can fast charge 1-cell to 16-cell NiMH or NiCd batteries at rates up to 4A from a wide range of input supplies and wall adapter voltages from 4.5V to 34V.

The company explained that a step-down constant current controller using synchronous rectification allows high current charging with high efficiency from input voltages up to 34V. With the LTC4011's 550kHz operating frequency, the solution allows the use of small sized inductors and capacitors. This minimizes PCB area, added Linear Tech. Moreover, integrated PowerPath control ensures that a system load remains powered at all times and is protected from issues associated with load transients. Other features include battery qualification, recharge and Top-Off (for NiMH). The LTC4011 also provides output signals for indicating READY, Top-Off, end-of-charge and FAULT status conditions.

The LTC4011CFE is offered in a thermally enhanced 20-lead TSSOP package and is suitable for use in portable instruments, diagnostic and control systems, as well as back-up equipment. The LTC4011 is rated for operation from 0 to 85°C. For 1,000-piece orders, pricing starts at $4.60 each.





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