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EL lamp drivers

• higher luminance driver

• audible noise reduction

Seen at this year’s Electronica trade show in Munich was this company’s two high-power electroluminescent (EL) lamp drivers. With the D305A driver as part of a high-brightness lamp system, designers can attain up to five times the luminance of traditional lighting systems for PDAs and other wireless electronic devices. The D305 can drive EL lamps as large as 100 cm2 with very high voltage AC output from 2.5 to 7.0 VDC supply voltages. For lamps as large as 180 cm², the D306A can convert 2.0 to 16.0 VDC supply input to up to 400V peak-to-peak output. The package of the D306A is a narrow-body SOIC-16 with a heat slug, making it suited to automotive instrument cluster and signage applications. Both drivers have waveshaping programmability for minimizing audible noise. Durel Corp, Chandler, AZ.   www.rsleads.com/212df-119

Low noise photodiodes
The S8745 and S8746 Silicon photodiodes feature low noise and excellent noise equivalent power characteristics. They are well suited for UV to near-IR precision photometry designs such as spectrophotometry and general-purpose optical measurement applications. The devices cover the 190 to 1100 nm spectral response range, in a package integrating a FET input op-amp and a large area Si photodiode. Hamamatsu Corp, Bridgewater, NJ.   www.rsleads.com/212df-120

Bright LEDs
The transparent substrate material used in the Ultra-Bright AlInGaP TS series produces 30% more illumination over conventional LEDs, making them suited for instruments and outdoor displays that must function in ambient lighting situations. Available in red or amber, the LEDs can be specified in surface-mount or thru-hole configurations, and in all industry standard packages. American Bright Optoelectronics Corp, Chino, CA.   www.rsleads.com/212df-121

Panel mount LEDs
The CR series of LEDs has a reflective, nickel-plated brass housing that stands up to tough use and harsh environments for automation control panels, instrumentation and front panel fault indicators. Equipped with a neoprene gasket/washer, the chrome-finish units are suitable for use in watertight applications. Built-in resistors permit use in both 5 to 60 VDC and 120 VAC circuits. Wilbrecht Electronics Inc, St Paul, MN.   www.rsleads.com/212df-122

Pin holders
A complete series of locating pin holders have been made available for single, bi-level and tri-level T-1 LED display applications. Manufactured of black 94-VO rated nylon material, the H-LP Series Holders provide extra PCB retention and uniform elevation during processing and handling, making them suited to high-shock and vibration environments as found in automotive and aerospace applications. BivarOpto, Irvine, CA.   www.rsleads.com/212df-123

LCD module
The small STN LCD module provides compliment to the fully programmable IS Series Smartswitch. The display features a wide, high-contrast viewing area of 13.9 mm x 10.6 mm, with a 36 x 24 pixel resolution to maximize clarity. This module works well in 1U rack mount units where 7-segment displays and LED matrices do not provide sufficient information. NKK Switches, Scottsdale, AZ.   www.rsleads.com/212df-124

Display LEDs
These MR16-style LED lamps combine InGaAlP and SiC/GaN technologies with a light-optimizing design for a package that can provide architects, entertainment designers and other lighting professionals an alternative for ornamental illumination. Power draw for TrackLED lamps is just 0.8 to 4W, and the lamps are offered in six sunlight-visible colors. LEDtronics, Torrance, CA.   www.rsleads.com/212df-125

CCF inverter
The DMD Series DC-AC inverter provides wide-range dimming for LCDs in the 15- to 18-in. diagonal size that are backlit by four cold cathode fluorescent lamps. Features include an open-frame construction that outputs up to 23W, integrated input and output connectors, and onboard PWM dimming that can be externally controlled by an analog signal. Endicott Research Group, Endicott, NY.   www.rsleads.com/212df-126

LCD mounting
Designed as a faster method for mounting the company’s Express Line of industrial LCDs, this speed clip device allows most monitors to mount in seconds. The need to locate and drill mounting holes is eliminated. Express Line monitors, offered in sizes of 12-, 15-, 17- and 18-in., are arm-mountable and can be equipped with resistive, capacitive or SAW touch screens. Nortech Engineering Inc, Hopedale, MA.   www.rsleads.com/212df-127

Blue LEDs
Three versions of surface-mount blue LEDs are suited for edge lighting, back lighting and illumination applications. All have low voltage operation for low power consumption (Vf = 3.15V @ 5 mA) and a narrow forward voltage range (2.75 to 3.15V) for better color and brightness consistency. The QTLP601C-EB has a low-profile design, while the QTLP610C-EB and QTLP611C-EB have right-angle configurations. Fairchild Semiconductor, San Jose, CA.   www.rsleads.com/212df-128

LCD touch screens
Resistant to scratches, the EW32F92FLW and EW32F92FEW LCDs have a surface film that also eliminates glare. Luminous intensity for this display is 10 cd/m², and they withstand vibration to 1.2G when not operating. The displays can be ordered in either a film or film/glass configuration. Other versions are offered in FSTN positive black or white, or STN positive blue. Emerging Display Technologies Corp, Irvine, CA.   www.rsleads.com/212df-130

Wide angle LED
The 1105CK Super Wide Angle SMT LED provides uniform light distribution with a viewing angle of 180 degrees. The color initially offered is yellow-green (572 nm), with yellow, orange and red soon to follow. Luminous intensity is 8.0 mcd @ 10 mA, and forward voltage is 2.1V and 2.8V @ 10 mA. Suggested applications include backlighting for keypads and switches. Stanley Electric Co, Irvine, CA.   www.rsleads.com/212df-131

Ambient light sensor
To reduce overall system power, the TSL2550 sensor converts light intensity to a digital signal output capable of direct SMBus interface. Display screen backlighting can now be adjusted automatically in portable equipment. The device, which operates from a single 2.7 to 5.5V supply, uses an integrating conversion technique to eliminate the effect of flicker from AC lamps for increased stability. TAOS Inc, Plano, TX.   www.rsleads.com/212df-132

Lamp assemblies
Custom lamp packaging is offered by this company, in combinations of various technologies including vacuum- or gas-filled line filament lamps, lens-end lamps, quartz halogen lamps and holders, and an array of LED arrangements. Aluminum, gold or silver reflectors can be specified, as well as custom lead lengths, special connectors, and board-mounted LEDs. Gilway Technical Lamp, Woburn, MA.   www.rsleads.com/212df-133

Blue display meters
This 3½ digit display uses 470 nm InGaN blue LEDs as an alternative to more-expensive vacuum-fluorescent displays. Suitable for marine, medical and industrial instrumentation, the device occupies less than one square in. of space, with dimensions of 1.38- x 0.88- x 0.48-in. The epoxy-encapsulated, 12-pin DIP package has a built-in blue filter. Datel Inc, Mansfield, MA.   www.rsleads.com/212df-134

Machine light
The HSW-75 is a large oil- and coolant-proof halogen work light for machine installations. The heavy-duty articulated arm fits into compact spaces, and the 75W output rating is higher than most standard halogen worklights. Besides industrial machine environments, the light is also suited to packaging machinery and food processing equipment. Waldmann Lighting Co, Wheeling, IL.   www.rsleads.com/212df-135

LCD for non-PC applications
This TFT LCD display module provides high luminance, high contrast, a wide viewing angle and durability for test, measurement and diagnostic applications. The 10.4-in. diagonal device accepts both 3.3 and 5.0V input voltages, and has two field-replaceable CCF backlighting lamps. The device can handle 150G shocks and 1G vibration levels, and operates over a range of 0º to 50ºC. Optrex America Inc, Plymouth, MI.   www.rsleads.com/212df-136

Fluorescent control IC
A one-chip solution is available for linear fluorescent lighting ballasts. The IR2166 replaces a separate ballast control IC, gate driver IC, PFC IC and additional discrete circuitry, to cut ballast costs by up to 30%. The chip incorporates a state machine to control the operating sequence of the ballast, and programmable preheat time and frequency can provide up to 30 times more lamp life. International Rectifier, El Segundo, CA.   www.rsleads.com/212df-137

Design guide
The Sunbrite LED guide is offered to engineers seeking alternative light sources for high illumination output applications. Described is a range of products that include round multi-chip lamps and square dot matrix lamps. Available lamps have from 3 to 24 LEDs, with intensities as high as 5000 mcd per chip. Filament lamp replacements are offered in industry-standard flanged-, bayonet- or screw-base configurations. Lumex Inc, Palatine, IL.   www.rsleads.com/212df-138

Application Xtra  

Charge pump regulator
Designed specifically for micro color thin film transistor LCDs used in portable devices, the ADM8839/40 regulator produces the three voltages required for the LCD controller and the panel transistors’ gate drivers (+5V @ 2%, +15V and –15V) — all from a single 3V supply. The regulator has a power saving shutdown mode with a Green Idle oscillator-enabling scheme. Analog Devices, Wilmington, MA.   www.rsleads.com/212df-129