NX20P0477 USB Type-C CC smart protection Rev. 1.0 3 February 2020 Product data sheet 1 General description NX20P0477 is a single-chip USB Type-C (USB-C) port overvoltage protection solution integrating a corrosion prevention algorithm from moisture. CC1/CC2 pins in the system side are protected from 28 V short to VBUS. USB-C allows VBUS voltage to increase up to 20 V through Power delivery protocol. CC1/2 pins can be shorted to VBUS due to mechanical twisting and sliding of the connector since USB-C connector contact pins are 25 % closer to each other than a micro USB connector. Moisture or fine dust may also cause the 20 V VBUS pin to be shorted to adjacent pins. NX20P0477 enables CC pins to be more robust in even abnormal conditions. NX20P0477 is 28 V DC tolerant on CON CC pins in connector side and quickly disconnects switches if the voltage is above overvoltage threshold, protecting CC pins in system side from high voltage. USB PD standard requires 80 A, 180 A or 330 A as Rp to detect sink device, but this Rp current accelerates USB-C connector pin corrosion when CC pins are contaminated with water, especially salt water. Furthermore, CC/PD controller may recognize this water impedance as detected sink, providing 5 V through VBUS pin, which accelerates corrosion. NX20P0477 converts these USB standard Rp currents from CC/PD controller to ultra-low current source to prevent corrosion. NX20P0477 integrates IEC 61000-4-2 ESD protection of +6 kV contact discharge and +8 kV air discharge on CON CC1 and CON CC2, which helps to reduce external BOM cost. NX20P0477 CON CC1 and CON CC2 pins are designed to be protected from surge voltage up to +/-40 V. NX20P0477 is offered with 0.5 mm pitch, 9 bumps, 1.49 mm x 1.49 mm x 0.555 mm WLCSP package. 2 Features and benefits USB Type-C CC1 and CC2 short protection to VBUS CON CC1 / CON CC2: 28V AMR DC Rd clamp circuit in CON CC1/CON CC2 in dead battery condition Smart corrosion prevention scheme with low current source 250 m Low R switch DSon Robust ESD immunity for CON CC1/CON CC2 IEC 61000-4-2 contact discharge: 6 kV IEC 61000-4-2 air discharge: 8 kV +/-40 V surge protection on CON CC1/CON CC2NXP Semiconductors NX20P0477 USB Type-C CC smart protection Low leakage current: 14 A CC1 / CC2 leakage current: < 1 A Fast OVP turn-off time: 60 ns 3 Applications Smartphone Tablet Laptop 4 Ordering information Table 1.Ordering information Type number Topside Package marking Name Description Version NX20P0477UK N77 WLCSP9 wafer level chip scale package, 9 terminals, 0.5 SOT1385-2 mm pitch, 1.49 mm x 1.49 mm x 0.555 mm body (backside coating included) 4.1 Ordering options Table 2.Ordering options Type number Orderable part Package Packing method Minimum Temperature number order quantity NX20P0477UK NX20P0477UKZ WLCSP9 REEL 7 Q1 DP 3000 T = -40 C to +85 C amb CHIPS NX20P0477 All information provided in this document is subject to legal disclaimers. NXP B.V. 2020. All rights reserved. Product data sheet Rev. 1.0 3 February 2020 2 / 24