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TPD7S019 Datasheet(PDF) 10 Page - Texas Instruments

No. de pieza TPD7S019
Descripción Electrónicos  7-Channel Integrated ESD Solution for VGA Port
Download  21 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPD7S019 Datasheet(HTML) 10 Page - Texas Instruments

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TPD7S019
SLLSE33C – AUGUST 2010 – REVISED NOVEMBER 2015
www.ti.com
8.2.2 Detailed Design Procedure
To begin the design process, some parameters must be decided upon; the designer should make sure:
• Voltage range on the protected line must not exceed the reverse standoff voltage of the TVS diode(s) (VRWM)
• Operating frequency is supported by the I/O capacitance CIO of the TVS diode
• IEC 61000-4-2 protection requirement is covered by the IEC performance of the TVS diode
For this application, the DDC signals will switch between 0 V and 5 V (with resistor pulling it up to 5-V power
supply). The VIDEO and SYNC signal levels are between 0 V and VCC_VIDEO / VCC_SYNC. All signals are not
exceeding the recommended values and the ESD cells on these pins will stay untriggered.
Depending on the resolution and the refresh rate of the display, the VIDEO (RGB) signals' bandwidth can be
from 24 MHz to 388MHz. The line capacitances from the ESD cells are 2.5 pF typical which is only takes up a
small portion of the total capacitance budget for the maximum frequency in this range.
±8-kV Contact ESD provided by TPD7S019 meets the ESD design goal of ±8 kV contact.
Put 1.5-k
Ω to 2-kΩ pullup resistor on the DDC lines to be compliant with the I2C standard. Termination resistors
on VIDEO lines are 50
Ω to 75 Ω to match the impedance on board trace.
8.2.3 Application Curves
Figure 7. IEC 61000-4-2 Clamping Voltage, Positive
Figure 8. IEC 61000-4-2 Clamping Voltage, Negative
Contact
Contact
9 Power Supply Recommendations
TPD7S019 has three power supply pins: VCC_DDC, VCC_SYNC and VCC_VIDEO. Depending on the system,
the recommended voltage level of these three power supplies can be as high as 5.5 V.
10
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