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TDA1675 Arkusz danych(PDF) 10 Page - STMicroelectronics |
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TDA1675 Arkusz danych(HTML) 10 Page - STMicroelectronics |
10 / 11 page 2 0.5 1 1.5 0 0.5 1 1.5 2 V1H (V) VS = 35V IY (App) Figure 8 : Output Saturation Voltage to Supply versus Output Peak Current when a flyback pulse has been generated. If the flyback pulse is absent (short cirucit or open cirucit of the yoke), the blanking output remains high so allowing the CRT protection. Pin 13 is an open collector output where the blanking pulse is available. Voltage regulator The main supply voltage VS, is lowered and regulated internally to allow the required reference voltages for all the above described blocks. Pin 14 is the main supply voltage input VS (positive). Pin 8 is the GND pin or the negative input of VS 0.5 1 1.5 0.5 1 1.5 2 0 VS = 35V IY (App) V 1L (V) Figure 7 : Output Saturation Voltage to Ground vs. Peak Output Current 32 0 16 24 8 -50 50 150 100 0 Tamb (˚C) R th = 8˚C /W R th = 4˚C /W R th = 2˚C /W Ptot (W) Figure 9 : Maximum allowable Power Dissipation vs. Ambient Temperature Figure 10 : Mounting Examples MOUNTING INSTRUCTIONS The power dissipated in the circuit must be removed by adding an external heatsink. Thanks to the MULTIWATT ® package attaching the heatsink is very simple, a screw or a compression spring (clip) being sufficient. Between the heatsink and the package, it is better to insert a layer of silicon grease, to optimize the thermal contact; no electrical isolation is needed between the two surfaces. TDA1675A 10/11 |
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