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Constant current regulators focus on 1.0 W LED lighting applications
September 23, 2011 // Paul Buckley
ON Semiconductor has expanded the company's portfolio of Constant Current Regulators (CCR s) to include the NSI50350A. The simple and robust device is designed to provide a thermally efficient and cost-effective alternative to passive/discrete components or driver integrated circuit (IC) solutions for current regulation of Light Emitting Diodes (LEDs). The device is ideal for a variety of 1 W lighting applications including automotive, architectural lighting and signage.
The NSI50350A CCR incorporates Self-Biased Transistor (SBT) technology and regulates current over a wide voltage range. It is designed with a built-in LED driver and has a negative temperature coefficient to protect LEDs from thermal runaway at extreme voltages and currents. The 350 mA ± 10% steady state regulation current (Ireg) is ideal for driving 1.0 W LEDs; for applications requiring 2.0 W LEDs, two of the NSI50350A CCRs can be placed in parallel. The device has an operating temperature range of −55 to +175 °C.
The NSI50350A requires no external components allowing it to be designed as either a high or low-side regulator. The high anode-cathode voltage (Vak) rating of 50 V maximum enables the device to withstand voltage surges that are common in automotive, industrial and commercial signage applications. The device turns on immediately and is at 20 percent of full regulation with only 0.5 V Vak applied.
The NSI50350A is offered in both DPAK-4 ( NSI50350AD ) or SMC ( NSI50350AS ) industry standard packages and are capable of dissipating 11 W and 5.8 W respectively.
Both devices are qualified to automotive AEC-101 standard and are UL94-V0 certified. The NSI50350AD is priced at $0.16 per unit and the NSI50350AS is priced at $0.12 per unit in 10,000 unit quantities.
Visit ON Semiconductor at www.onsemi.com
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Business News
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Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The development platform for i.MX 6Quad from element14 (built to the Freescale SABRE Lite design) is an evaluation platform featuring the powerful i.MX 6Q, a multimedia application processor with Quad ARM Cortex-A9 cores at 1.2 GHz from Freescale Semiconductor.
This month, Freescale and element14 are giving away five such platforms, worth £128.06 each, for EETimes Europe's readers to win. The platform helps evaluate the rich set of peripherals and includes a 10/100/Gb Ethernet port, SATA-II, HDMI v1.4, LVDS, parallel RGB interface, touch screen interface, analog headphone/microphone, micro TF and SD card interface, USB, serial port, JTAG, camera interface, and input keys for Android.
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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.
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