PI6C49019AIEX

AN1155 PI5USB2546/A Application Note Kevin Wu, PTC, Diodes Incorporated Introduction The PI5USB2546 and PI5USB2546A are USB charging port controllers and power switches with an integrated USB 2.0 high-speed data line (D+/ D–) switch. The PI5USB2546 and PI5USB2546A provide the electrical signatures on D+/D– to support charging schemes listed under the device feature section. These parts are compatible with both popular BC1.2 compliant and non-BC1.2 compliant devices. System wake up (from S3) with a mouse/keyboard (both low speed and full speed) is fully supported in the devices. Additionally, the devices support two distinct power management features, namely power wake and port power management (PPM) through /STATUS pin. Power wake allows for power supply control in S4/S5 charging and PPM manages port power in a multi-port application. The PI5USB2546 and PI5USB2546A 73-mΩ power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. Two programmable current thresholds provide flexibility for setting current limits and load detect thresholds. Wake-on-USB Feature (Mouse/Keyboard Wake Feature) Wake-on-USB is the ability of a wake-configured USB device to wake a computer system from its S3 sleep state back to its S0 working state. Wake-on-USB requires the data lines to be connected to the system USB host before the system is placed into its S3 sleep state and remain continuously connected until they are used to wake the system. The PI5USB2546 and PI5USB2546A support low and full-speed HID (human interface device), such as a mouse/key board wake function. There are two scenarios under which wake-on-mouse is supported by the PI5USB2546 and PI5USB2546A. The specific CTL pin changes that the PI5USB2546/A will override are shown below. The information is presented as CTL1, CTL2 and CTL3. The ILIM_SEL pin plays no role. 1. 111 (CDP/SDP2) to 011 (DCP-Auto) 2. 110/010 (SDP1) to 011 (DCP-Auto) PLEASE NOTE THAT PI5USB2546 AND PI5USB2546A DO NOT SUPPORT HIGH-SPEED HID WAKE FUNCTION. AN1155 – Rev 1 Application Note 1 of 2 www.diodes.com February 2020 © Diodes Incorporated AN1155 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. 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LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safetycritical, life support devices or systems. Copyright © 2020, Diodes Incorporated www.diodes.com AN1155 – Rev 1 Application Note 2 of 2 www.diodes.com February 2020 © Diodes Incorporated