New-Tech Europe Magazine | August 2017

new products

Combined with a thermally enhanced 4mm x 5mm QFN package, the LT3932 offers a very compact high power LED driver solution. Other features include accurate LED current sense with a monitor output, 99.9% duty cycle operation and programmable UVLO.

• PLL Synchronization to External Clock • EXTVCC LDO Powers Chip from VOUT = 3.3V to 40V • OPTI-LOOP® or Fixed Internal Compensation • Input & Output Overvoltage Protection • Thermally Enhanced (5mm × 6mm) QFN Package Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

New Ruggedized Capacitor from New Yorker Electronics is Designed for Long Life in Harsh Conditions New Yorker Electronics has released a new ruggedized capacitor with an extraordinary shelf-life and built for applications demanding very high-performance under all operating conditions. The new Cornell Dubilier Electronics HHT Series of Ruggedized Axial-Lead Aluminum Electrolytic Capacitors are designed to endure the rigors of extreme industrial and aerospace applications. The HHT is the only axial-lead electrolytic featuring a glass-to-metal seal to prevent dry out of the capacitor electrolyte. Shelf life is an extraordinary ten years and operational rated life is 2,000 hours at rated voltage and at +175°C. At 150°C and full-rated voltage, HHT capacitors outperform competitive technologies in a 5,000-hour test with ripple currents of up to 10 Arms. This level of performance makes the HHT an excellent match for high-stress applications in military, aerospace, down-hole and off-road transportation applications. Nine values are offered, from 470µF to 4,700µF, with ratings from 16Vdc to 40Vdc. The CDE HHT Series is the only aluminum electrolytic capacitor available in the market with +175°C performance. This is usually the domain of the considerably more expensive wet tantalum technology. The reason is the HHT’s glass-to-metal seal. Without the seal, high temperatures will cause conventional electrolytics to lose electrolyte over time. This causes a drop in capacitance and an increase in ESR. With capacitance stability at high temperature, low leakage

36V, 2A Monolithic Synchronous Step-

Down LED Driver with Silent Switcher Topology Minimizes EMI Concerns

MILPITAS, CA & NORWOOD, MA – July 11, 2017 – Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LT3932, a monolithic, synchronous, step-down DC/DC converter with internal 36V, 2A power switches and an internal PWM generator. Its fixed frequency, peak current mode control accurately regulates current within ±1.5% for strings of up to 2A LEDs. Its integrated PWM generator offers a 128:1 dimming ratio. If dimming ratios of up to 5000:1 are required, the LT3932 and an external PWM generator can accommodate these applications. The LT3932’s 3.6V to 36V input voltage range is ideal for a wide variety of applications, including automotive, industrial and architectural lighting. The combination of its Silent Switcher® topology and spread spectrum frequency modulation minimizes EMI concerns. The LT3932 can drive up to eight 2A white LEDs from a nominal 32V input, delivering in excess of 50 watts. The LT3932 can deliver efficiencies of 93% while switching at 2MHz, eliminating the need for external heat sinking and offering a tiny, compact solution footprint. Internal open/short LED protection and fault indication offers added reliability. The LT3932’s switching frequency is programmable from 200kHz to 2MHz or it can be synchronized to an external clock signal.

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