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KMID : 1151820170110030101
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Journal of the Korean Society of Radiology
2017 Volume.11 No. 3 p.101 ~ p.108
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TID and SEL Testing on OP-Amp. of DC/DC Power Converter
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Lho Young-Hwan
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Abstract
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DC/DC switching power converters are commonly used to generate a regulated DC output voltage with high efficiency. The advanced DC/DC converter uses a PWM-IC with OP-Amp. (Operational Amplifier) to control a MOSFET (metal-oxide semiconductor field effect transistor), which is a switching component, efficiently. In this paper, it is shown that the electrical characteristics of OP-Amp. are affected by radiations of γ rays using 60Co for TID (Total Ionizing Dose) testing and 5 heavy ions for SEL (Single Event Latch-up) testing. TID testing on OP-Amp. is accomplished up to the total dose of 30 krad, and the cross section() versus LET(MeV/mg/) in the OP-Amp. operation is evaluated SEL testing after implementation of the controller board.
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KEYWORD
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OP-Amp., TID, SEL, SEE, PWM-IC
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