High-voltage DC-DC converters for power electronics in noise-sensitive applications introduced by TDK Lambda

June 16, 2021
These non-isolated DC-DC converter power supplies can operate from a nominal 12-volt input, and deliver output voltages ranging from 180 to 2,000 volts.

SAN DIEGO – TDK-Lambda Americas Inc. in San Diego is introducing the CHVM series of high-voltage DC-DC converters for noise-sensitive applications like photomultiplier tubes, photodiodes, scanning electron microscopes, X-ray fluorescence spectrometers, mass spectrometers, and ultrasonic probes.

These non-isolated power supplies can operate from a nominal 12-volt input, and deliver output voltages ranging from 180 to 2,000 volts. The power electronics devices achieve low-output ripple and noise with a metallic case that provides five-sided shielding to reduce radiated emissions.

The series comprises 20 parts, with positive or negative polarity output voltages of 180, 300, 350, 470, 1,000, 1,500, and 2,000 volts. The maximum output ripple and noise level is 150 millivolts and typical measurements are between 5 and 50 millivolts.

The output voltage of these DC-DC converters can be adjusted over a 0.5-to-100 percent range with an external voltage or resistor or inhibited using the remote on/off function. The input voltage is 11 to 13-volts for the 1.4- and 1.5-Watt models, 10.8 to 16.5-volt for the 2 Watts and 10.8 to 13.2-volt for those rated 2.5 Watts or higher.

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The compact converters are available in three case sizes. The CHVM1R5 (1.4 Watts and 1.5 Watts) measures 44 by 16 by 30 millimeters (WxLxH), the CHVM2 and CHVM2R6 (2 Watts and 2.6 Watts) 110 by 12 by 19.75 millimeters, and the CHVM2R5, CHVM2R7 and CHVM3 (2.5 Watts, 2.7 Watts and 3 Watts) 80 by 12 by 19.75 millimeters.

With a start-up temperature of -20 degrees Celsius, the operating temperature range is -10 to 50C for the 1.4 and 1.5 Watts parts and -10 to 60C, derating linearly to 60 percent load above 50C, for the higher-power models.

All parts have over-current protection, are certified to IEC/UL/CSA/EN 62368-1 safety standards and have the CE mark for the Low Voltage and RoHS Directives.

For more information contact TDK Lambda online at www.us.lambda.tdk.com.

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