© rob hill dreamstime.com Components | September 23, 2013
110V LED Controller with Spread Spectrum Frequency Modulation
Linear Technology announces the LT3795, a 110V, high-side current sense DC/DC converter designed to regulate a current or voltage to a constant value, ideal for driving high brightness (HB) LEDs. Its 4.5V to 110V input voltage range.
Summary of Features: LT3795The LT3795 uses an external low side N-channel MOSFET and can drive up to 90V of white LEDs from a nominal 12V input, delivering in excess of 50 watts. Spread spectrum frequency modulation reduces EMI emissions, while an internal PMOS switch driver delivers robust short-circuit protection in boost and buck-boost topologies. The LT3795 incorporates a high-side current sense, enabling it to be used in boost, buck, buck-boost or SEPIC topologies. Additionally it offers current both input and output current limiting and monitoring for added reliability and design flexibility. The LT3795 can deliver efficiencies of over 94% in boost mode, minimizing the need for external heat sinking. A frequency adjust pin permits the user to program the frequency between 100kHz and 1MHz, optimizing efficiency while minimizing external component size and cost. Combined with a thermally enhanced TSSOP-28 package, the LT3795 offers a very compact HB LED driver or charger solution. The LT3795 uses PWM dimming, which delivers constant LED color with dimming ranges of up to 3,000:1. For less demanding dimming requirements, the CTRL pin can be used to offer a 10:1 analog dimming range. Its fixed frequency, current mode architecture offers stable operation over a wide range of supply and output voltages. Robust open and short-circuit protection maximize overall system reliability, while C/10 detection optimizes both battery and SuperCap charging designs. Additional features include input and output current reporting, frequency synchronization, programmable UVLO and a programmable fault restart timer. The LT3795EFE is available in a thermally enhanced TSSOP-28 package. Pricing starts at $3.45 each. An extended temperature version or I grade, the LT3795IFE, is also available with pricing starting at $3.86 each. Finally, a high temperature, or H grade, the LT3795HFE is available, the pricing starts at $4.11 each. All prices are in 1,000-piece quantities and all versions are available from stock.
- 3000:1 True Color PWM™ Dimming
- Wide Input Voltage Range: 4.5V to 110V
- Input & Output Current Reporting
- PMOS Switch Driver for PWM & Output Disconnect
- Internal Spread Spectrum Frequency Modulation
- ±2% Constant Voltage Regulation
- ±3% Constant Current Regulation:
- 0V ≤ VOUT ≤ 110V
- Programmable Input Current limit
- CTRL Inputs Linearly Adjust LED Current
- Adjustable Frequency: 100kHz to 1MHz
- Programmable Open LED Protection with OPENLED Flag
- Short-Circuit Protection & SHORTLED Flag
- Programmable Undervoltage Lockout with Hysteresis
- Soft-Start with Programmable Fault Restart Timer
- C/10 Detection for Battery Charging
- Available in 28-Lead TSSOP Package
New VP of business development at Smith The distributor of electronic components and semiconductors has appointed Renato Souza to the position of Vice President of Business Development. Renato previously served as Vice President, Latin America of Smith since 2017.
Bosch launches 5G tests at Reutlingen wafer fab The German company believes 5G will be a key building block of digitalization and connectivity in manufacturing and logistics. And for that reason, Bosch is now starting compatibility tests and channel measurements for setting up a 5G network in its wafer fab in Reutlingen.
ACM Research receives orders from two new analog/power IC customers The supplier of wafer cleaning technologies for advanced semiconductor devices, has received purchase orders and final stage bidding activities for a total of USD 36 million from two new China-based customers that manufacture analog and power IC devices.
ClassOne's Solstice plating system selected for advanced MicroLEDs Semiconductor equipment manufacturer ClassOne Technology announces the sale of its Solstice GoldPro electroplating system to an unnamed developer of microLED technology for advanced applications.
Jenoptik: order intake down on prior year; order backlog slightly up From January through early March business performance was in line with expectations, but clear impacts of the corona pandemic and increasing uncertainty within the automotive industry became apparent from late March on.
Smiths Detection completes acquisition of PathSensors Smiths Detection has completed the acquisition of PathSensors, a bio-technology solutions and environmental-testing company, based in Baltimore, MD, USA.
Saab divests Dutch-based QPS Saab has divested the Dutch-based company QPS (Quality Positioning Services), a provider of hydrographic software solutions within the global maritime industry. The decision is in line with Saab’s strategy to optimise its product portfolio and increase focus on five core areas.
Eyeing SiC and GaN potential – GlobalWafers team up with NCTU Advancements in 5G and electric vehicle technologies are bringing the mounting demands of power semiconductor. GlobalWafers is teaming up with the National Chiao Tung University (NCTU) to develop the third generation semiconductor material.
Phison expands with new R&D centre Taiwanese NAND Flash controller IC and storage solutions provider, Phison Electronics, broke ground on a new R&D center and inventory management in Guangyuan Science Park in Zhunan township, back in late march.
Infineon swings to loss as the pandemic continues impact target markets “Infineon has so far coped well with the challenging situation caused by the coronavirus pandemic. As a company, we reacted quickly to the new situation and established a framework that has enabled us to stabilize our business,” says CEO Dr. Reinhard Ploss.
Murata completes new production building The Japanese manufacturer’s subsidiary, Izumo Murata Manufacturing, has completed the construction of a new production facility which started back in August 2019.
Analog Devices team up with Intel to address 5G network design challenges The companies are collaborating to create a flexible radio platform that addresses 5G network design challenges and will enable customers to scale their 5G networks more quickly and economically.
Atlas Copco has acquired the technology and operating assets of iTrap The Swedish company has acquired a technology for process diagnostics and control in the semiconductor industry.
Goodix closes acquisition of Dream Chip Technologies Shenzhen Goodix Technology Co. Ltd., an integrated solution provider, has completed its acquisition of Dream Chip Technologies GmbH (DCT), a fabless German semiconductor technology company.
Rebound Electronics team up with IHS Markit The pace of change in the electronics industry continues unabated for all customer types – OEM, ODM and EMS. This is driven by all component manufacturer types – including semiconductor, passive, connector and electromechanical – dynamically changing pricing, lead time, life cycle management and more.
New management takes the reins at Würth Elektronik eiSos As of the 1st of May 2020, Dirk Knorr and Josef Wörner have been appointed as General Managers for the German business of the Würth Elektronik eiSos GmbH & Co. KG, having been a part of the management circle of the company for years.
Seasoned financial and semiconductor executive joins GlobalFoundries GlobalFoundries has appointed David Reeder as its new Chief Financial Officer (CFO).
Global Semiconductor Packaging Materials Market to Reach $20.8 Billion by 2024 The global semiconductor packaging materials market will track chip industry growth to expand from USD 17.6 billion in revenue logged in 2019 to USD 20.8 billion in 2024, a 3.4% Compound Annual Growth Rate (CAGR), SEMI and TechSearch International forecast.
Analog Devices acquires HDMI business from INVECAS Analog Devices, Inc. has acquired the High Definition Multimedia Interface (HDMI) business of Santa Clara based INVECAS.
Intel’s chief engineering officer to leave the company Changes to Intel’s technology organisation are coming. New leaders have been appointed and Murthy Renduchintala will leave the company.Load more news