Decoy Chips on KnightLi Blog https://www.knightli.com/en/tags/decoy-chips/ Recent content in Decoy Chips on KnightLi Blog Hugo -- gohugo.io en Sat, 11 Apr 2026 13:10:58 +0800 Common USB PD Decoy Chips: CH224K vs HUSB238 vs HUSB237 vs IP2721 vs XSP https://www.knightli.com/en/2026/04/11/usb-pd-decoy-chip-comparison/ Sat, 11 Apr 2026 13:10:58 +0800 https://www.knightli.com/en/2026/04/11/usb-pd-decoy-chip-comparison/ <p>When building a USB PD sink/power-request design, decoy chips are usually selected by voltage capability, protocol support, and cost.</p> <h2 id="chip-comparison">Chip Comparison </h2><table> <thead> <tr> <th>Chip</th> <th>Key Features</th> <th>Best For</th> </tr> </thead> <tbody> <tr> <td>CH224K (WCH)</td> <td>Popular and cost-effective, resistor-configurable, up to 20V output</td> <td>High-power PD requests and general-purpose designs</td> </tr> <tr> <td>HUSB238 (Hynetek)</td> <td>Small size, high integration, compliant with USB PD3.0, supports PPS and PD3.1 28V</td> <td>Compact devices that need higher voltage output</td> </tr> <tr> <td>HUSB237 (Hynetek)</td> <td>Minimal PD Sink design, supports PD3.1 (5V/9V/12V/15V/20V), up to 20V/5A (100W), supports SOP&rsquo; (eMarker emulation), BC1.2 and QC2.0</td> <td>Cost-effective sink designs that need very simple external circuitry, especially 100W cable-related use cases</td> </tr> <tr> <td>IP2721 (Injoinic)</td> <td>Auto plug-in/out detection, compatible with PD2.0/3.0, stable behavior</td> <td>Products needing automatic detection and stronger protocol handling</td> </tr> <tr> <td>XSP series (for example XSP01/XSP05)</td> <td>Cost-effective, broad support for PD + QC + FCP + SCP + AFC</td> <td>Multi-protocol fast-charging products such as phone adapters and wireless charging modules</td> </tr> </tbody> </table> <h2 id="selection-tips">Selection Tips </h2><ul> <li>For mature and budget-friendly designs: start with CH224K or XSP series.</li> <li>For compact boards and higher voltage demand: consider HUSB238 first.</li> <li>For minimal BOM and up to 100W (20V/5A): consider HUSB237 first.</li> <li>For stronger protocol handling and auto detection: consider IP2721 first.</li> </ul>