60 V synchronous buck-boost LED driver delivers over 100 W of LED power
March 13, 2012 // Christoph Hammerschmidt
Linear Technology announces the LT3791, a synchronous buck-boost DC/DC LED driver and voltage controller, which can deliver over 100 W of LED power. Its 4.7 V to 60 V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting.
Similarly, its output voltage can be set from 0 V to 60 V, enabling the LT3791 to drive a wide range of LEDs in a single string. Its internal 4-switch buck-boost controller operates from input voltages above, below or equal to the output voltage, ideal for applications such as automotive, where the input voltage can vary dramatically during stop/start, cold crank and load dump scenarios. Transitions between buck, pass-through and boost operating modes are seamless, offering a well-regulated output even with wide variations of supply voltage. The LT3791's unique design utilizes three control loops to monitor input current, LED current and output voltage to deliver optimal performance and reliability.
The LT3791 uses four external switching MOSFETs and delivers from 5 W to over 100 W of continuous LED power with efficiencies up to 98.5%. LED current accuracy of ±6% ensures constant lighting while ±2% output voltage accuracy enables the converter to operate as a constant voltage source. The LT3791 utilizes either analog or PWM dimming as required by the application. Furthermore, its switching frequency can be programmed between 200 kHz and 700 kHz or synchronized to an external clock. Additional features include output disconnect, input and output current monitors, open and shorted LED detection and integrated fault protection.
Flexible sensor detects multiple ions in fluids
November 24, 2015
Imec and Holst Centre have demonstrated a prototype of a single-chip electrochemical sensor for simultaneous detection of ...
Starting all over again on plastic: ARM
From electronics to maths and money madness
Analog IC market growth set to slow
Volkswagen deploys data glasses in series production
Startup CircuitSeed wants to be the ARM of analogue
November 23, 2015
Founded last summer after two years of preliminary research and with several patents pending, Californian startup Circuit ...
Imagination Technologies leverages kickstarter for IoT kit launch
Taiwan considers lifting China investment ban
Why Japan hasn't led IoT
- Battery Size Matters
- Software-Defined Radio Handbook - 11th edition
- Multichemistry Buck Battery Charger Controller
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
InterviewCEO interview: InvenSense's Abdi on expanding MEMS horizons
InvenSense Inc. is a MEMS company that has epitomized a fabless approach to a sector that is still highly reliant on a thorough grasp of the manufacturing and packaging processes. We interviewed CEO Behrooz ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, FTDI Chip is giving away six MCU development board packages complete with a dedicated compiler (including a full integrated development environment).
Worth Euro 315 each, the packages include a credit card sized Clicker 2 board for the FT90X 32-bit MCU supplied alongside a powerful dedicated compiler from MikroElektronika.
MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.