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SDM4952 Datasheet(PDF) 5 Page - SamHop Microelectronics Corp. |
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SDM4952 Datasheet(HTML) 5 Page - SamHop Microelectronics Corp. |
5 / 5 page F igure 11. S witching T est C ircuit F igure 12. S witching Waveforms t V V t t d(on) OUT IN on r 10% td(off) 90% 10% 10% 50% 50% 90% toff tf 90% PULS E WIDTH 2 1 0.1 0.01 S quare Wave P ulse Duration (sec) F igure 13. Normalized T hermal T ransient Impedance C urve 5 S DM4952 INVE R TE D Duty C ycle=0.5 0.2 0.1 0.05 0.02 S ingle P ulse 10 -4 10 -3 10 -2 10 -1 1 10 100 PDM t1 t2 1. R thJA (t)=r (t) * R thJA 2. R thJA=S ee Datasheet 3. T JM-T A = P DM* R thJA (t) 4. Duty C ycle, D=t1/t2 -VDD R D V V R S V G G S IN G E N OUT L |
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