test resistor

Datel

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This article comes from the Spring 2012 edition of Nordic Semiconductor’s ULP Wireless Q, to download the entire publication, head here.

In a one-stage approach (Figure 1), an ac-rectified line voltage is converted to the required dc current through a flyback transformer, filtered and applied to the LEDs. The rectified voltage contains ripple at two times the line frequency (100 Hz or 120 Hz). The frequency component also gets transformed and appears on the output of the LEDs as an alternating current, which can cause flicker.

Luminus Devices

Keystone Electronics Corp.

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In a one-stage approach (Figure 1), an ac-rectified line voltage is converted to the required dc current through a flyback transformer, filtered and applied to the LEDs. The rectified voltage contains ripple at two times the line frequency (100 Hz or 120 Hz). The frequency component also gets transformed and appears on the output of the LEDs as an alternating current, which can cause flicker.

Precision Design Associates, Inc.

Finder Relays, Inc.

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Q. For background, what is your role at MathWorks regarding ISO 26262? A. As Automotive Marketing Manager for Europe, I lead the effort to foster the adoption of MathWorks products for technical computing and Model-Based Design in the European automotive industry. In this role, I have a strong focus on the messaging around industry relevant standards such as AUTOSAR and ISO 26262.

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