Battery Power - November 2011 - (Page 22)

New Products • IC’s & Semiconductors digital control to achieve greater than 90 percent efficiency, tight output voltage accuracy and design flexibility. The devices’ adaptive voltage scaling capability saves up to 25 percent more power than previous solutions, and eliminates the need for up to 12 external components. The controllers achieve even greater power efficiency when paired with TI’s NexFET power MOSFETs, such as the CSD87350Q5D. Designers configure the TPS40400 or TPS40422’s parameters to monitor and control the power system using TI’s easy-to-use graphical user interface software tool. In addition, TI’s SwitcherPro tool makes it easy to develop internally and externally compensated designs in less than one minute. austriamicrosystems has released two battery charger ICs for Li-Ion batteries in mobile devices. The AS3610/11 step-down DC-DCs offer fast and highly efficient charging of Li-Ion batteries in mobile devices with up to 1.25 A output current. The ICs include numerous safety and protection features, internal current measurement and USB Host/OTG (on the go) boost mode operation. The AS3610 DC-DC provides an I²C interface for external control and the AS3611 operates independently. The performance and features of the AS3610/11 make the charger ICs very well suited for applications that are powered by one Li-Ion battery. Such applications include high-end blood glucose meters, remote controls, GPS outdoor navigation or tracking equipment, mobile phones, e-dictionaries and e-book readers. The AS3610/11 switching charger ICs were designed with inputs from the handset and portable markets to use a high efficiency switch mode charger with minimum ripple. Implementation is simplified with most options and features controlled by pin strapping or OTP (one time programmable) memory. These features include current limit set, charging current, OTG boost and more. The AS3610 step-down DC-DC also supports 900 mA input current limitation for USB 3.0. Other features of austriamicrosystems’ AS3610/11 step-down DC-DCs include: 22 V over-voltage protection; reverse polarity protection; chip and battery temperature supervision and charger time-out supervision. The AS3610/11 is available in a 3 mm by 3 mm MLPD14 package, and operates from a supply of 2.7 V to 5.5 V over a temperature range of -40ºC to 85ºC. A WL-CSP package option is available for PCB space-critical applications. Step-Down DC-DC Switching Charger ICs for Single Cell Li-Ion Batteries in Mobile Devices 1A, Low Noise Synchronous Buck-Boost DC/DC Converter Offers Extended Battery Run Time for Li-Ion And Alkaline-Powered Devices Texas Instruments, Inc. (TI) has introduced two 20-V stepdown voltage regulators with PMBus digital interface and adaptive voltage scaling capability for non-isolated point-of-load designs. Together with the National system power protection and management products, TI provides the design engineer with complete single-, dual- and multi-rail, multi-phase PMBus solutions, allowing telecom and server designers to intelligently monitor, protect and manage the state of health of their power systems. TI’s 2-MHz TPS40400 single-channel controller with a 3-V to 20-V input range and the new 1.2 MHz TPS40422 dual-channel or multi-phase controller with 4.5 V to 20 V input voltage range combine high-performance analog voltage regulation with Texas Instruments Expands PMBus Power Solutions For Point-of-Load Designs Linear Technology has introduced the LTC3536, a synchronous buck-boost converter that delivers up to 1 A of output current from a Li-Ion/Polymer source or 300 mA from dual cell alkaline/NiCD/NiMH sources. Its 1.8 V to 5.5 V input and output voltage range achieves a ±1 percent accurate output with inputs above, below or equal to the regulated output. The latest generation single inductor buck-boost pulse width modulation (PWM) topology incorporated in the LTC3536 provides a continuous transition through all of the operating modes, making it well suited for noise-sensitive applications that must maintain a constant output voltage even as the battery voltage declines below the output. In many cases, this can increase battery run time 25 percent versus a buck regulator. The LTC3536’s switching frequency is user programmable from 300 kHz to 2 MHz and can be synchronized to a system clock, optimizing the trade-off between efficiency and external component size. The combination of 1 percent output voltage accuracy, low noise, tiny externals and a 3 mm by 3 mm DFN package provides a small solution footprint, typically required in many handheld RF and precision measurement applications. The LTC3536 includes two N-channel MOSFETs and two P-channel MOSFETs (RDS(ON) of 0.06 ohm and 0.08 ohm, respectively) to deliver efficiencies up to 95 percent. Burst mode operation is user programmed to improve efficiency at light loads and requires 28 uA of quiescent current. Shutdown current is less than 1 uA, further extending battery run time. Other features include soft-start, short circuit protection, current limiting and thermal shutdown. 22 Battery Power • November/December www.BatteryPowerOnline.com http://www.BatteryPowerOnline.com

Table of Contents for the Digital Edition of Battery Power - November 2011

Battery Power - November/December 2011
Contents
Vishay Intertechnology Introduces Powdered-Iron- Based Rx Coil for Wireless Charging
GenSet Eliminator, Designed to Reduce Fuel Consumption and Promote Safety.
The Challenges of Manufacturing Lithium-Ion Batteries for the Electric Vehicle Industry
Considerations for Customized Battery Packs
Efficient Power Protection Means Less Cost, Not Less Reliability
Safety and Preventing Thermal Run Away in Large Li-Ion Batteries
ZigBee Resource Guide
Batteries
Charging & Testing
ICs and Semiconductors
Components
Power Supplies
Industry News
Research & Development
Marketplace
Calendar of Events

Battery Power - November 2011

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