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TPD3E001DRSR 데이터시트(PDF) 5 Page - Texas Instruments |
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TPD3E001DRSR 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 11 page www.ti.com APPLICATION INFORMATION IO3 GND IO2 IO1 V BUS D+ D– GND 0.1 µF V CC USB Controller R T R T Detailed Description TPD3E001 LOW-CAPACITANCE 3-CHANNEL ±15-kV ESD-PROTECTION ARRAY FOR HIGH-SPEED DATA INTERFACES SLLS683D – JULY 2006 – REVISED APRIL 2007 When placed near the connector, the TPD3E001 ESD solution offers little or no signal distortion during normal operation due to low IO capacitance and ultra-low leakage current specifications. The TPD3E001 ensures that the core circuitry is protected and the system is functioning properly in the event of an ESD strike. For proper operation, the following layout/ design guidelines should be followed: 1. Place the TPD3E001 solution close to the connector. This allows the TPD3E001 to take away the energy associated with ESD strike before it reaches the internal circuitry of the system board. 2. Place a 0.1- µF capacitor very close to the V CC pin. This limits any momentary voltage surge at the IO pin during the ESD strike event. 3. Ensure that there is enough metallization for the VCC and GND loop. During normal operation, the TPD3E001 consumes nA leakage current. But during the ESD event, VCC and GND may see 15 A to 30 A of current, depending on the ESD level. Sufficient current path enables safe discharge of all the energy associated with the ESD strike. 4. Leave the unused IO pins floating. 5. The VCC pin can be connected in two different ways: a. If the VCC pin is connected to the system power supply, the TPD3E001 works as a transient suppressor for any signal swing above VCC + VF. A 0.1-µF capacitor on the device VCC pin is recommended for ESD bypass. b. If the VCC pin is not connected to the system power supply, the TPD3E001 can tolerate higher signal swing in the range up to 10 V. Please note that a 0.1- µF capacitor is still recommended at the V CC pin for ESD bypass. 5 Submit Documentation Feedback |
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