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TDA6107Q Folha de dados(PDF) 10 Page - NXP Semiconductors |
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TDA6107Q Folha de dados(HTML) 10 Page - NXP Semiconductors |
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10 / 16 page  1999 Oct 26 10 Philips Semiconductors Product specification Triple video output amplifier TDA6107Q External flashover protection For sufficient flashover protection it is necessary to apply an external diode and 100 Ω resistor for each channel. See application note “Application and Product description of TDA6107Q/N1” (report number AN96072). To limit the diode current an external 1 k Ω carbon high-voltage resistor in series with the external diode and a 2 kV spark gap are needed (for this resistor value, the CRT has to be connected to the main PCB). VDD must be decoupled to GND: 1. With a capacitor >20 nF with good HF behaviour (e.g. foil); this capacitor must be placed as close as possible to pins 6 and 4, but definitely within 5 mm. 2. With a capacitor >3.3 µF on the picture tube base print. Switch-off behaviour The switch-off behaviour of the TDA6107Q is controllable. This is due to the fact that the output pins of the TDA6107Q are still under control of the input pins for low power supply voltages (approximately 30 V and higher). Bandwidth The addition of the flash resistor produces a decreased bandwidth and increases rise and fall times. Dissipation Regarding dissipation, distinction must first be made between static dissipation (independent of frequency) and dynamic dissipation (proportional to frequency). The static dissipation of the TDA6107Q is due to voltage supply currents and load currents in the feedback network and CRT. The static dissipation Pstat equals: Where: VDD = supply voltage IDD = supply current VO(c) = DC value of cathode voltage IO(c) = DC value of cathode current. The dynamic dissipation Pdyn equals: Where: CL = load capacitance Cint = internal load capacitance (≈4 pF) fi = input frequency Vo(c)(p-p) = output voltage (peak-to-peak value) δ = non-blanking duty cycle. The IC must be mounted on the picture tube base print to minimize the load capacitance CL. P stat V DD I DD 3V O(c) I O(c) × × + × = P dyn 3V DD C L C int + () f i V o(c)(p-p) δ × × × × × = |
Nº de peça semelhante - TDA6107Q |
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Descrição semelhante - TDA6107Q |
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