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TDA9210 데이터시트(PDF) 9 Page - STMicroelectronics |
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TDA9210 데이터시트(HTML) 9 Page - STMicroelectronics |
9 / 24 page STV9553 9/24 7 POWER DISSIPATION The total power dissipation is the sum of the static DC and the dynamic dissipation: PTOT =PSTAT +PDYN. The static DC power dissipation is approximately: PSTAT =VDD xIDD +VCC xICC The dynamic dissipation is, in the worst case (1 pixel On/ 1 pixel Off pattern): PDYN =3 VDD xCL xVOUT(PP) x f x K (see Note 6) where f is the video frequency and K the ratio between the active line and the total horizontal line duration. Example: for VDD = 110V, VCC = 12V, IDD = 15mA, ICC = 40mA, VOUT =40 VPP, f = 25MHz, CL = 8pF and K = 0.72. We have: PSTAT = 2.13W and PDYN = 1.90W Therefore: PTOT =4.03W. Note 6: This worst thermal case must only be considered for TJmax calculation. Nevertheless, during the average life of the circuit, the conditions are closer to the white picture conditions. |
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