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TPD4S014EVM Arkusz danych(PDF) 1 Page - Texas Instruments |
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TPD4S014EVM Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 5 page User 's Guide SLVU471 – June 2011 TPD4S014 EVM Introduction The TPD4S014 is a single-chip solution for USB charger port protection. This device offers low capacitance TVS type ESD clamps for the D+, D – and standard Capacitance for the ID pin. On the VBUS pin, this device can handle over-voltage protection up to 28V. The over voltage lock-out feature ensures that, if there is a fault condition at the VBUS line, the TPD4S014 is able to isolate the VBUS line and protect the internal circuitry from damage. Similarly, the under voltage lock out feature ensures that there is no power drain from the internal VCC plane to external VBUS side in case there is short to GND. There is a 16ms turn-on delay after VBUS crosses the under voltage lockout threshold, in order to let the voltage stabilize before closing the switch. This function acts as a deglitch filter and prevents unnecessary switching if there is any ringing on the line during connection. Highlighted Features • Over-voltage protection functionality • Under voltage lockout functionality • USB connectors used for ease of use • LED indicating fault condition • Test point for EN and ACK signals • D+, D – lines are routed as differential pair • Bottom section of board can be used for measurement of bandwidth and ESD performance. EVM Description and Configuration The TPD4S014EVM consists of two separate sections, the TOP section and the BOTTOM section. Both these sections are powered up by a 1.8V – 3.3V supply. This supply is used for three purposes: 1. To provide the HI and LO logic levels for the EN signal 2. To provide a pullup voltage for the open drain ACK signal 3. To power the fault indicator LED The TOP section consists of the USB connectors. The connector on the Left (marked INPUT) connects to the VBUS of the TPD4S014 and the one of the right (marked OUTPUT) connects to the VCC of the 1 SLVU471 – June 2011 TPD4S014 EVM Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated |
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