Battery Power - November/December 2013 - (Page 22)

New Products * ICs & Semiconductors 300 mA LDO Regulators from Advanced Power Electronics Corp. Have Low Quiescent Current Advanced Power Electronics Corp. (USA) has announced a series of low drop-out linear regulators that include current and thermal shutdown protection features. APE8800A-HF-3 positive linear regulators have a very low quiescent current of about 30 µA, an output voltage accuracy of ±2 percent, and can supply a guaranteed 300 mA of output current with a drop-out voltage of only 250 mV. The APE8800A-HF-3 regulators are able to operate with low ESR ceramic output capacitors as small as 1 µF for stability. As well as current limit protection, the APE8800A-HF-3 also offers an on-chip thermal shutdown feature providing protection against overload or conditions where the junction temperature may exceed the specified thermal shutdown temperature. The new regulators are available with several fixed output voltages from 1.2V to 5 V, and are packaged in low-profile, space-saving RoHS/REACH-compliant halogen-free 5-lead SOT-23-5 and TSOT-23-5 packages. 250 mA Wide VIN Range Buck-Boost Charge Pump With Low Noise Now Offered in High Reliability, MP-Grade Temperature Range Linear Technology Corp. has announced a high reliability MP-grade, wider temperature range version of the LTC3245, a versatile 250 mA high voltage buck-boost charge pump. The MP grade has an operating junction temperature range of -55°C to 150°C. The LTC3245 uses switched capacitor fractional conver- 22 Battery Power * November/December 2013 sion to maintain regulation over a wide range of input voltage from 2.7 V to 38 V and produces a regulated output of 3.3 V, 5 V or adjustable (2.5 V to 5 V). Internal circuitry automatically selects a conversion ratio of 2:1, 1:1 or 1:2 to optimize efficiency as input voltage and load conditions vary. Low operating current (18 μA with no load, 4 μA in shutdown) and low external device count (three small ceramic capacitors and no inductors) make the LTC3245 well suited for low power, space constrained automotive/ applications such as ECU/CAN transceiver supplies, industrial housekeeping supplies and efficient low power 12 V to 5 V conversion. The LTC3245's unique constant frequency architecture with reduced switching edge rates provides lower conducted and radiated noise compared to conventional switching regulators. The device has pin selectable Burst Mode operation, enabling the user to trade off low output ripple for better efficiency and lower quiescent current. Other features include low external parts count with ceramic capacitor stability, soft-start circuitry to prevent excessive current flow during startup, plus short circuit and thermal protection. The LTC3245 MP grade is available in a compact 12-lead MSOP package with a backside thermal pad. 1,000-piece pricing starts at $7.55 each and devices are available from stock. TI Wireless Power Chip Simplifies Development of Qi Charging Stations Building on its power management portfolio, Texas Instruments (TI) has introduced its next-generation wireless power transfer circuit to support the Wireless Power Consortium (WPC) 1.1 specification. The bq500212A transmitter, which is shipping in volume production, requires one-third fewer components than competitive solutions. The circuit allows designers to quickly take to market Qi-compliant wireless charge pads or stations that can operate from a USB port or 5-V power adapter. With more Qi charging stations available in the marketplace, consumers of Qi-enabled smartphones, smartwatches and many other "enclosed" portable consumer electronics will be able to keep their batteries charged longer. "AGENT Smartwatches need to be water resistant, and consumers shouldn't need to worry about plugging their watches into a charging adapter day after day," said Chris Walker, founder of Secret Labs. "TI's wireless power products give our customers the ability to simply set their AGENT Smartwatch on the included Qi charging pad (or any other Qi-compliant charging pad) from time to time to keep the battery topped off. No wires, no hassle." TI's wireless power management portfolio is helping fuel design engineers' imaginations to develop efficient wireless charging capabilities for smartphones, tablets and other portable electronics, and design wireless power charging sources, ranging from pads to sources used in cars and furniture. The company is actively developing power circuits to support the WPC standard, as well as other wireless power specifications, including Alliance for Wireless Power (A4WP) and Power Matters Alliance (PMA). TI's bq5101x integrated receivers provide a regulated www.BatteryPowerOnline.com http://www.BatteryPowerOnline.com

Table of Contents for the Digital Edition of Battery Power - November/December 2013

Solid-State Battery Developed at CU-Boulder Could Double the Range of Electric Cars
GS Yuasa Batteries Help Power Orbital Science’s Cygnus Spacecraft on Mission to ISS
Li-Ion Battery Technology Delivers High Power for Data Center UPS Installations
Battery Demands for Yesterday, Today and Tomorrow
Understanding When and Why You Need UPS Battery Replacement
Charging Forward: A Resurgence of the EV Movement and the Role Charging Infrastructure Plays in Continuing the Momentum
Batteries
Charging Systems
Testing & Monitoring
ICs & Semiconductors
Manufacturing
Components
Industry News
Marketplace

Battery Power - November/December 2013

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