LED lighting modules suitable for use in lamps

Edited by the Electronicstalk editorial team Feb 28, 2011Sharp has introduced six 10W Mini Zeni LED components that are compact, lightweight, bright and suitable for a range of indoor and outdoor applications, such as spot lighting and LED retrofit lamps.
The modules have a light output of up to 690 lumens, a luminous flux of up to 73 lm/W, a CRI value of 87 and a service life of 40,000 operating hours at an operating temperature of 80C.
Sharp has left the dimensions and the carrier material unaltered.
Measuring 15 x 12 x 1.6mm and with an aluminium ceramic plate as carrier material, the 10W variant is suitable for a wide range of lighting applications.
The 10W Mini Zeni models are operated using a forward voltage of 19.6V and a forward current of 480mA.
The square LED matrix consists of a total of 60 LEDs that are arranged in ten parallel-switched series of sixes and achieve a luminous flux of between 610 and 690lm.
The serial and parallel array of the LED matrix ensures fail-proof operation while offering low thermal emission.
The flat surface of the ceramic plate and the soldering points already in place make it possible to attach the modules to a suitable heat sink without too much effort or additional connecting material, thus guaranteeing good heat dissipation.
The colour temperature of the white-light LED lighting modules is in the range of 2,700 to 6,500 Kelvin with the shades 'Warm White', 'Natural White', 'Pure White' and 'Cold White'.
All models of the 10W Mini Zeni series have CRI values of up to 87 and thus ensure colour fastness and are true to detail.
With regard to the CRI values and the colour temperatures, the 10W LED Mini Zeni modules correspond to the requirements of the international Energy Star Programme, which specifies a CRI value of at least 80.
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Battery charger minimises power dissipation

Edited by the Electronicstalk editorial team Feb 28, 2011Linear Technology has introduced the LT3651-4.2, a 4A monolithic synchronous buck battery charger for one-cell li-ion/polymer batteries used in industrial hand-held instruments and notebook computers.
The LT3651-4.2 accepts inputs up to 32V with a 40V absolute maximum rating for added system margin.

Linear Technology has introduced the LT3651-4.2, a highly efficient, 4A monolithic synchronous buck battery charger for one-cell li-ion/polymer batteries
Charge current is programmable and dynamically adjustable up to 4A; fully integrated synchronous power devices minimise power dissipation and save board space.
User-selectable timer or C/10 termination requires no external microcontroller and simplifies the design.
The LT3651-4.2 does not require external high-precision resistors to set the float voltage, further saving cost and space.
Applications include industrial hand-held instruments, 12V to 24V automotive and heavy equipment applications, desktop cradle chargers and notebook or tablet computers.
The programmable switching frequency (200kHz to 1MHz) of the LT3651-4.2 enables the designer to balance solution size, power loss and filtering needs.
Synchronous operation enables charging efficiencies as high as 90 per cent.
Final float voltage accuracy is +0.5 per cent, charge current accuracy is +7.5 per cent and C/10 detection accuracy is +4 per cent.
Once charging is terminated, the LT3651-4.2 automatically enters a low current standby mode, which reduces the input supply current to 80uA.
In shutdown the input bias current is reduced to 15uA.
The LT3651-4.2 maximises battery life during all non-charging periods by draining <1ua data-blogger-escaped-battery.="" data-blogger-escaped-from="" data-blogger-escaped-the="">For safety and autonomous charge control, the device includes: automatic restart and preconditioning; a thermistor input for temperature-qualified charging; programmable input current limit; bad battery detection; and binary-coded status-output pins.
The LT3651-4.2 is available in a low-profile (0.75mm) 36-pin 5 x 6mm QFN package, and is offered in both E and I grade versions, guaranteed from -40C to 125C.
Pricing starts at $4.13 and $4.75 each, respectively, in 1,000-piece quantities.
Two-cell 8.2V and 8.4V options and a one-cell 4.1V version are planned for release within the next few months.
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Method prints onto aluminium or sheet-metal panels

Edited by the Electronicstalk editorial team Feb 28, 2011Elma Electronic has introduced a new digital printing method for painting front panels, which allows the kind of images, colours and possibilities that you would get from a paper digital printer.

The technology allows the aluminium or sheet-metal panels to accept very specific colours and images that were previously not possible.

Further, the cost for printing highly illustrative designs with multiple colours is the same as for just one colour.

In previous screening processes for front panels, each colour is a separate labour step and an additional cost.

Elma's digital printing enables customers to use more colours within their existing budgets and price points.

Another benefit of the Elma digital printing process is the detail and quality it provides.

Fine images, logos or text can be faded or lost with traditional silk-screening.

The digital process from Elma provides such precision that even very small text and fine detail of a logo comes through clearly.

Further, customers can now apply special gradients, shadows and other effects that were not feasible until now.

As just one process is required for digital printing, even the most elaborate designs save time and reduce costs.

In addition, the simplified process helps to improve quality and reliability, while reducing mistakes.

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Electronics enclosure provides dust-tight seal

Edited by the Electronicstalk editorial team Feb 28, 2011Schroff now offers a range of NEMA Type 9 enclosures, which are designed for housing electronic or electrical equipment in locations that are hazardous due to the presence of combustible dusts.

Manufactured by Hoffman, one of Schroff's sister companies within the Pentair Technical Products group, these robust enclosures are constructed from 5mm, 6mm and 10mm steel plate, with an ANSI grey polyester powder-coat finish.

Fibre gaskets, attached to the covers using mechanical retainers, ensure that the enclosures provide a dust-tight seal and prevent the ingress of combustible particulates.

Available in a choice of 14 different sizes with internal dimensions ranging from 203 x 152 x 102mm to 1,219 x 914 x 305mm, the NEMA Type 9 enclosures incorporate mounting brackets and either weldnuts or collar studs to support the optional internal panels.

The larger models are equipped with heavy-duty cover hinges.

In addition to the panels and panel support kits, other accessories include terminal block kits and industrial corrosion inhibitors.

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ICs capable of protecting multiple USB ports

Edited by the Electronicstalk editorial team Feb 28, 2011Intersil has introduced a range of power controllers designed to meet the power supply requirements of industry-standard USB devices, which offer high-current capability in a small package.

The ISL6185 and ISL6186 provide port power for products based on the USB 2.0 and 3.0 interface standards, offering designers several current-limit-level options, all with an accuracy 3x better than competitive solutions.

This results in more precise protection and increased design flexibility for today's USB power designs.

In addition, the ISL6185 and ISL6186 come in industry standard packages for easy, drop-in replacement as well as a new, smaller packages for saving more board space.

The ISL6185 independently controls two power channels and features a pair of 71 milliohm P-channel power switches.

Providing added design flexibility, each power channel is capable of protecting multiple USB ports.

The ISL6185 provides continuous current at 0.6, 1.1, 1.5 and 1.8A levels.

Its high current-limit capability supports USB 3.0 as well as USB 2.0.

In addition, both devices feature automatic restart/retry after an over-current or transient event, ensuring continued operation without requiring additional monitoring.

No user or system intervention is required to reset the devices, with automatic recovery when the load fault is cleared.

The ISL6186 USB power controller provides single channel over-current (OC) fault protection totaling up to 3.6A, allowing a single device to protect multiple USB ports.

The device features a 45 milliohm P-channel MOSFET power switch for power control and continuous current options for 1.5, 3 and 3.6A.

It also includes a Power Good output capability that provides supply status with no need for external components.

The range consists of eight individual functional product variants and three package options.

It is rated for a nominal 2.5 to 5V range and specified over full commercial and industrial temperature ranges.

Each device also features internal current monitoring, accurate current limiting, reverse bias protection and current limited delay to turn-off for system supply protection, along with control and communication I/O.

Off-state supply current is 1mA.

The ISL6185/6 range is provided with enable polarity options in an industry standard eight-pin SOIC pinout along with two versions in the 70 percent smaller 3x3 DFN.

The eight-pin DFN package offers the same performance as the eight-pin SOIC; the 10-pin DFN offers higher current capability in a very small package because of lower electrical and thermal resistance.

Prices start at $0.75 each in 1,000-piece units.

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Enhanced sensor connector seals to IP67 rating

Edited by the Electronicstalk editorial team Feb 28, 2011Binder-USA, has improved its M8 over-moulded sensor connector by adding a knurled and hex locking nut, which allows the connector to be tightened with a torque wrench to ensure proper mating.

The M8 overmolded connectors have three, four or six gold-plated contacts and are capable of handling up to 60V and up to 4A per contact.

When properly mated, the M8 over-moulded connectors are sealed to an IP67 rating.

The male and female cord sets are available in two and five-meter lengths.

Mating receptacles and field-attachable cable connectors are also offered, for a complete connecting system.

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High-density card socket saves PCB space

Edited by the Electronicstalk editorial team Feb 28, 2011Samtec has introduced a high-density socket featuring a bi-level mating design comprising two levels of contacts on a staggered 1mm centreline, which creates a card-effective 0.5mm pitch.

The Edge Rate High Density Edge Card Socket (BEC5 Series) is available with up to 140 I/Os in a 1 x 1.27mm-grid PCB pad layout, with four rows of contacts.

This system is suitable for high-speed applications benefiting from its rugged Edge Rate contacts, which are designed for superior impedance control and reduced broadside coupling with increased durability and cycle life.

The 0.5mm pitch high-density socket accepts standard 1.60mm' and 2.40mm-thick cards.

Additional features include weld tabs, alignment pins and lead-free solder charge terminations for easy board processing.

Tin-lead solder charges, as well as alternative platings and pin counts, are also available.

In addition to the new BEC5 Series 0.5mm pitch high-density system, Samtec's full line of High Speed Edge Rate Edge Card Sockets includes 0.8mm (HSEC8 Series) pitch in surface-mount and edge-mount designs for parallel, perpendicular and planar-board mating as well as a right-angle dual-stacking design (DSEC Series).

Stamped contact design sockets are also available in 0.635mm (MEC6 Series), 1mm (MEC1 Series), 1,27mm (MECF Series) and 2mm (MEC2 Series) pitches for edge-mount, right-angle and vertical applications.

Pricing on the BEC5 is approximately $0.10 per mated line.

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