SONiX SNPD1746 USB PD 3.2 EPR Controller: Up to 48 V EPR with Integrated MCU, ADC, and Power Control
USB-C charger and power-supply development requires careful coordination of charging protocols, voltage measurement, current regulation, and power control. Bringing these functions together within a limited PCB footprint is an important step toward a simpler hardware architecture and more efficient development.
The SONiX SNPD1746 is a fast-charging controller supporting USB PD 3.2 EPR and EPR applications up to 48 V. It integrates an 8051 MCU, Flash, a shunt regulator, gate driver, VBUS discharge, a 12-bit SAR ADC, and LSCSA constant-current control. This combination brings key protocol, measurement, and control resources into a single platform for USB-C chargers and EPR power supplies.
Key Features and Specifications
| Parameter | SNPD1746 Specification or Function |
|---|---|
| Charging protocol | USB PD 3.2 EPR |
| EPR voltage support | Up to 48 V |
| Maximum VCC | 56 V |
| Processing core | 8051 MCU |
| Program memory | Integrated Flash |
| Analog measurement | 12-bit SAR ADC |
| VBUS step | 14.6 mV |
| Constant-current control | LSCSA CC Control |
| Regulation and gate drive | Integrated shunt regulator and gate driver |
| Output discharge | Integrated VBUS discharge |
Up to 48 V EPR for USB-C Power Designs
The SNPD1746 supports USB PD 3.2 EPR for applications up to 48 V, providing a protocol-control foundation for USB-C chargers, adapters, and EPR power supplies. Development teams can plan the output voltage, current, and power stage around the requirements of the connected equipment and the intended product.
The controller also features a 56 V maximum VCC specification. Planning the IC supply separately from the USB-C output, and following the manufacturer's recommended operating conditions, allows the control circuit to be integrated appropriately with the EPR power architecture.
Integrated 8051 MCU and Flash Consolidate Control
An integrated 8051 MCU and Flash provide processing and program storage for firmware and application control. Combined with the on-chip measurement and power-control functions, these resources allow developers to organize control sequences, process measurement data, and manage operating states within one platform.
This approach reduces the coordination required by a distributed control architecture. Firmware, measurement, and regulation can be developed together, helping engineers manage system configuration and validation more efficiently.
Shunt Regulation, Gate Drive, and Discharge in One Architecture
The SNPD1746 integrates a shunt regulator, gate driver, and VBUS discharge function, bringing regulation, power-switch drive, and output discharge into the same control architecture. Using the reference design, engineers can connect these functions to the external power stage and reduce the need for some separate control components and interconnections.
For space-constrained chargers and adapters, this integration can simplify schematics and control-signal routing while preserving layout flexibility for power components, thermal management, and mechanical design. Integrated VBUS discharge also allows output management to be planned alongside the rest of the control sequence.
12-Bit SAR ADC and LSCSA Connect Measurement with Regulation
The 12-bit SAR ADC and 14.6 mV VBUS step provide a basis for voltage monitoring and control decisions. Integration with the MCU allows VBUS measurements to be incorporated directly into the control workflow, bringing voltage monitoring and operating-state management together.
For current regulation, the SNPD1746 provides LSCSA constant-current control, which can be combined with external circuitry and firmware. Having voltage measurement, current control, and gate-drive resources on the same platform helps engineers coordinate sensing and regulation while simplifying control-circuit development and validation.
A Control Platform for USB-C Chargers, Adapters, and EPR Supplies
The SNPD1746 can be evaluated for USB-C fast chargers, USB PD power adapters, and power supplies requiring EPR support up to 48 V. Its integrated architecture spans protocol control, voltage monitoring, current regulation, and output discharge, allowing developers to focus more of their effort on the power stage, thermal design, firmware, and complete-system performance.
More integration. Less control-circuit complexity. By combining EPR support with multiple control functions, the SONiX SNPD1746 offers a practical option for teams seeking to simplify PCB layouts, reduce external control-component requirements, and streamline fast-charging product development.
Contact AENEAS Electronics
Contact AENEAS Electronics Co., Ltd. for SONiX SNPD1746 product information, component selection, and application inquiries for USB-C chargers and EPR power supplies.
Product specifications and operating conditions are subject to the latest manufacturer documentation.