New 1C1A desktop charger based on IP6520 and IP6505 standards

This project is an upgrade of the old desktop charger!
 
IP6520 Introduction:
The IP6520 is a step-down converter with integrated synchronous switching, supporting multiple fast charging protocols, Type-C output, and USB PD2.0/PD3.0 (PPS) protocols, providing a complete solution for car chargers, fast charging adapters, and smart power strips. The IP6520 has a built-in power MOSFET, an input voltage range of 7.1V to 32V, and an output voltage range of 3V to 12V, providing a maximum output power of 25W. It can automatically adjust the output voltage and current according to the detected fast charging protocol. Typical output voltages and currents are: 5V/3A, 9V/2.5A, and 12V/2A. The IP6520's PD output has CV/CC characteristics. When the output current is less than the set value, it outputs in CV mode with a constant output voltage; when the output current is greater than the set value, it outputs in CC mode with a reduced output voltage. The IP6520 features automatic overcurrent point adjustment. After a successful handshake with the high-voltage SCP and fast charging protocol, it supports a maximum output of 10V/2.5A. When the device connected to the IP6520's Type-C interface supports high-voltage SCP, it prioritizes high-voltage SCP output, resulting in higher charging power compared to PD output. The IP6520's output voltage includes line compensation; as the output current increases, the output voltage increases accordingly to compensate for voltage drops caused by connection line impedance. The IP6520 has a soft-start function to prevent inrush current from affecting the stability of the input power supply. The IP6520 supports Type-C interface output, integrates various fast charging protocols, and can automatically identify the fast charging protocol supported by the connected device via CC1/CC2 or DP/DM, then automatically adjust the output voltage and current accordingly. The IP6520 supports the following fast charging protocols: DCP (Apple and BC1.2), Qualcomm QC2.0/QC3.0 (class A), Huawei's FCP and HVSCP fast charging protocols, and Samsung's AFC (MAX 12V) fast charging protocol. The IP6520 supports USB PD2.0/PD3.0 (PPS) output protocols. The IP6520 has multiple protection functions, including input overvoltage and undervoltage protection, and output overcurrent, overvoltage, undervoltage, and short circuit protection.
The IP6520 uses an ESOP-8 package.
 
It supports DCP/QC2.0/QC3.0/FCP/HVSCP/AFC/MTK PE/PD3.0/PPS up to 25W (IP6520-C-65W20V, maximum 68.25W).
 
 
The IP6505
is a buck converter with integrated synchronous switching, supporting 11 fast charging protocols and providing a complete solution for car chargers, fast charging adapters, and smart power strips. The IP6505 integrates a power MOSFET, with an input voltage range of 4.5V to 32V and an output voltage range of 3V to 12V, providing a maximum output power of 24W. It can automatically adjust the output voltage and current according to the detected fast charging protocol. Typical output voltages and currents are: 4V@3.6A, 5V@3.4A, 7V@3A, 9V@2.5A, and 12V@2A. The IP6505 boasts a buck conversion efficiency of up to 97%. The IP6505's output exhibits CV/CC characteristics: when the output current is less than a set value, it outputs in CV mode with a constant output voltage; when the output current is greater than a set value, it outputs in CC mode with a reduced output voltage. The IP6505 features line compensation, increasing the output voltage as the output current increases to compensate for voltage drops caused by connection impedance. It also has a soft-start function to prevent inrush current from affecting the stability of the input power supply. The IP6505 integrates various fast charging protocols, automatically identifying the supported fast charging protocols of connected devices via DP/DM and adjusting the output voltage and current accordingly. Supported fast charging protocols include: DCP (Apple, Samsung, and BC1.2), Qualcomm QC2.0/QC3.0 (class A), MTK PE1.1/2.0, Huawei FCP/SCP, Samsung AFC, and Spreadtrum SFCP. The IP6505 offers multiple protection functions, including input overvoltage and undervoltage protection, and output overcurrent, overvoltage, undervoltage, and short-circuit protection.
The IP6505 is packaged in an ESOP-8 package.
 
Supports DCP/QC2.0/QC3.0/MTK PE1.1/PE2.0/FCP/SCP/AFC/SFCP up to 24W.
 
For this project
, PCB1 should be made of FR-4 material, and PCB2 (empty board) should be made of aluminum substrate. A frosted acrylic panel is recommended.
Required components include 4 M2 screws (5mm long), 4 M2 double-ended knurled screw posts (11mm long), 8 M2 single-ended knurled screw posts (3mm thread, 3mm body), and one 3.5mm thick thermal pad.
Installation instructions are omitted here.
For the IP6520 model, the IP6520-C-65W20V option is available (this model supports 20V; pay attention to capacitor voltage rating).
This project is an upgrade of the old desktop charger.
 
Update Log
2024-04-29: Fixed LED1 polarity error; thanks to @hmjb888 for pointing out the error.