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TDA9533 Datasheet(PDF) 4 Page - STMicroelectronics |
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TDA9533 Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 8 page TDA9533 4/8 TYPICAL APPLICATION PC Board Lay-out The best performance is obtained with a carefully designed HF PC board, especially for the output and input capacitors. Rise/fall time and bandwidth are measured on a 8pF load (including a PC board parasitical, sock- et and a CRT capacitor). The input voltage range for the cut-off adjustment pins is from 1 to 4 volts and a 10 nF to 47 nF by- pass capacitor is recommended on these pins. Power Dissipation The power dissipation is the sum of the DC and the dynamic dissipation. As the feedback resistors are integrated, the DC power dissipation (capacitive load) can be estimat- ed by: PSTAT =VDD .IDD +VCC .ICC The dynamic dissipation in worst case (full band- width and black pixel/white pixel picture - (2) is: PDYN =3 VDD .CL .VOUT(PP) . f.K where f is the video frequency and K the active line duration / total duration. Example: for VDD = 110V, VCC = 12V, VOUT =40 VPP,IDD = 25mA, ICC = 60mA, fVIDEO = 40MHz, CL = 8pF and K = 0.72. We have: PSTAT = 3.47W and PDYN = 3.04W Therefore: Ptot = 6.51W. Note: 2 This worst thermal case must only be considered for TJmax calculation. Nevertheless, during the average life of the circuit, the conditions are very close to the white picture conditions. TDA9533 75 Ω IN1 VC.OFF1 4 2 10 6 12 14 IN2 VC.OFF2 IN3 VC.OFF3 C.OFF1 C.OFF2 C.OFF3 GND3 OUT3 CL RP CL CL GND2 GND1 OUT2 OUT1 RP RP 1 3 7 9 15 13 8 5 11 75 Ω 75 Ω GNDS VDD VCC VCC VDD 110V |
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