Battery Charger IC does not require microcontroller.
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Press Release Summary:
With input voltages from 4.5-34 V, LTC4011 charges 1- to 16-cell NiMH/NiCd batteries at rates up to 4 A. Features include 550 kHz synchronous PWM current source controller, -dV and/or dT/dt fast charge termination, NiMH top-off charge, and operating temperature range of 0-85°C. Housed in thermally enhanced 20-lead TSSOP package, autonomous charger solution is suited for use in portable instruments, diagnostic and control systems as well as back-up equipment.
Original Press Release:
Fast, Complete Standalone 1- to 16-Cell NiMH/NiCd Battery Charger
MILPITAS, CA - August 9, 2005 - Linear Technology Corporation introduces the LTC4011, a complete NiMH/NiCd battery charger solution without any microcontroller or firmware programming required. The LTC4011 includes charge initiation, monitoring, protection, charge termination and constant current control circuitry for an autonomous charger solution. The IC can fast charge 1- 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. Both -dV and dT/dt charge termination can be active simultaneously in addition to a programmable safety timer.
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 thus minimizing printed circuit board area. Moreover, integrated PowerPath(TM) 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 ideal for use in portable instruments, diagnostic and control systems as well as back-up equipment. The LTC4011 is rated for operation from 0°C to +85°C. The 1,000-piece quantity pricing starts at $4.60 each.
Summary of Features: LTC4011
Complete NiMH/NiCd Charger for 1 to 16 Cells
No Microcontroller or Firmware Required
550kHz Synchronous PWM Current Source Controller
PowerPath Control Support
Precision 5% Accurate Programmable Charge Current
Wide Input Range from 4.5V to 34V
-dV and/or dT/dt Fast Charge Termination
Automatic NiMH Top-Off Charge
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT and LTC are registered trademarks and PowerPath is a trademark of Linear Technology Corp.
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
