Energy-harvesting tool targets low energy sources
Linear Technologycontact supplier
LTC3588-1 energy-harvesting solution
Linear Technology has announced the LTC3588-1, a complete energy-harvesting solution that is optimised for low energy sources, including piezoelectric transducers.
The LTC3588-1 integrates a low-loss, full-wave bridge rectifier with a high-efficiency buck converter to harvest ambient vibrational energy via piezoelectric transducers and then convert it to a well-regulated output to power application microcontrollers, sensors, data converters and wireless transmission components.
The LTC3588-1 operates from an input voltage range of 2.7 to 20V, making it suitable for a range of piezoelectric transducers, as well other high output impedance energy sources.
Its high-efficiency buck DC/DC converter delivers up to 100mA of continuous output current or even higher pulsed loads.
Its output can be programmed to one of four (1.8, 2.5, 3.3 or 3.6V) fixed voltages to power a wireless transmitter or sensor.
Quiescent current is 950nA with the output in regulation (at no load), maximising overall efficiency.
The LTC3588-1 is designed to interface directly with a piezoelectric or alternative AC power source, rectify a voltage waveform and store harvested energy in an external storage capacitor while dissipating any excess power via an internal shunt regulator.
An ultralow quiescent current (450nA) undervoltage lockout (UVLO) mode with a wide hysteresis window enables charge to accumulate on the storage capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output.
In its no-load sleep state, the LTC3588-1 regulates the output voltage, consuming 950nA of quiescent current while continuously charging the storage capacitor.
The LTC3588-1 requires minimal external components and is packaged in a 3 x 3mm DFN or a thermally enhanced MSOP-10 package, providing a compact solution footprint for a range of energy-harvesting applications.
The LTC3588EDD-1 is available in a 3 x 3mm DFN package and the LTC3588EMSE-1 is available in a thermally enhanced MSOP-10 package.
Linear Technology has introduced the LTC4234, a 20A Hot Swap controller with integrated MOSFET and current sensing, providing a small-footprint hot-plug solution for high-density circuit boards. Specified over the 0ºC to +70ºC commercial, -40ºC to +85ºC industrial and -40ºC to +125ºC automotive temperature ranges, the LTC4234 is offered in a 38-pin 5 x 9mm QFN package.
Linear Technology is offering the LTC3892: a high-voltage dual-output synchronous step-down DC/DC controller that draws only 29µA when one output is active and 34µA when both outputs are enabled.
IntelliSense.io is set to exhibit the latest upgrades to its Intelligent Factory suite of applications at Hannover Messe. The Brains wireless sensor network (WSN), which is at the heart of Intelligent Factory, utilises SmartMesh wireless sensor networking modules from Linear Technology.
The LT3952 from Linear Technology is a current-mode step-up DC/DC converter with an internal 60V, 4A DMOS power switch. It is specifically designed to drive high-power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage source. The LT3952’s 3V to 42V input voltage range makes it suitable for a variety of applications, including automotive, industrial and architectural lighting.
Linear Technology will be demonstrating its SmartMesh IP embedded wireless mesh networks, powered by Sol Chip’s Solar Battery, at Hannover Fair 2015 (Hall 9, Stand G29). The use of solar energy to power industrial Internet of Things (IoT) applications provides users with a maintenance-free wireless solution, as no batteries are required for operation.