FEAST(MP) First tests with the radiation tolerant DC/DC converter - - PowerPoint PPT Presentation

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Jul 27, 2023 610 likes •759 views

FEAST(MP) First tests with the radiation tolerant DC/DC converter from CERN Florian Roether Institut fr Kernphysik FEAST features Input voltage range 5 to 12V Continuous 4A load capability Adjustable switching frequency 1-3MHz

SLIDE 1

FEAST(MP)

First tests with the radiation tolerant DC/DC converter from CERN Florian Roether – Institut für Kernphysik

SLIDE 2

FEAST features

Input voltage range 5 to 12V
Continuous 4A load capability
Adjustable switching frequency 1-3MHz
Over-Current protection
Under-voltage lockup
Over-Temperature protection
Power Good output
Radiation tolerant: TID up to >200Mrad(Si)

SLIDE 3

Typical application

SLIDE 4

FEASTMP

SLIDE 5

FEASTMP test board

SLIDE 6

Temp vs output current

35 45 55 65 75 85 95 105 500 1000 1500 2000 2500 3000 3500

Temperature (°C) Output Current (mA)

no Heatsink Heatsink High Load w. Heatsink

Shutdown after 5min

SLIDE 7

Efficiency vs output current

30,00 40,00 50,00 60,00 70,00 80,00 90,00 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500

Efficiency (%) Output Current (mA)

SLIDE 8

Spectrum without low pass filter

SLIDE 9

Raw output without low pass filter

SLIDE 10

Low pass filter

SLIDE 11

Spectrum with low pass filter

SLIDE 12

Raw output with low pass filter

SLIDE 13

Conclusion

The noise produced by the DC/DC converter can be

significantly reduced by low pass filters

FEASTMP with 2.5 Volt or even 1.8Volt will be tested to

minimize the power loss in the LDOs

Further investigation into two layer DC/DC converter

concept