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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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
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