Summary of 5W USB TYPE-C POWER DELIVERY 3.0 ADAPTER REFERENCE DESIGN
The EVLSTCH03-45WPD is a USB-IF certified 45W USB Type-C Power Delivery 3.0 adapter reference design by STMicroelectronics. It features an isolated quasi-resonant flyback converter using the STCH03 controller and MDmesh™ M6 MOSFET on the primary side. The secondary side employs the SRK1001 for synchronous rectification with an STripFET™ F7 MOSFET, while the STUSB4761 manages CC/CV regulation and PD negotiation. ESD protection is provided by an ESDA25L array. The design meets high efficiency standards and various safety regulations within a compact form factor.
Parts used in the EVLSTCH03-45WPD:
- STCH03 controller
- STD7N65M6 Power MOSFET
- SRK1001 adaptive synchronous rectification controller
- STL110N10F7 Power MOSFET
- STUSB4761 controller
- ESDA25L Dual Transil array
- Optocoupler
The EVLSTCH03-45WPD 45W USB Type-C® Power Delivery 3.0 adapter from STMicroelectronics is a USB-IF certified solution and reference design. The EVLSTCH03-45WPD is an isolated ac-dc power supply with a standalone USB PD controller. The board implements at the primary side a quasi-resonant flyback converter based on the STCH03 controller with optocoupler feedback for voltage regulation. This controller combines a high-performance low-voltage PWM controller chip with a 650V HV start-up cell in the same package. The STCH03 controller drives the gate of the new 650V MDmesh™ M6 technology Power MOSFET STD7N65M6.
At the secondary side, to increase the system efficiency, the rectification is based on the SRK1001 adaptive synchronous rectification controller. This controller drives the gate of the 100V STripFET™ F7 technology Power MOSFET STL110N10F7.
Always on the secondary side the CC/CV regulation loop to drive the power regulation stage and the USB Type-C® PD interface are based on the STUSB4761 controller. This controller offers the benefits of a full hardware USB PD stack allowing robust, deterministic and safe negotiation in line with USB PD standard.
The EVLSTCH03-45WPD is protected against destructive electrostatic discharge from the USB Type-C® connector using a Dual Transil array for ESD protection ESDA25L.
Key Features
- USB-IF certified
- USB Type-C® PD 3.0 references:
- Power Brick EVLSTCH03-45WPD TID: 2071
- PD Controller STUSB4761 TID: 2070
- Universal ac input range VIN:
- 90- to 264-Vac
- PD output profile:
- 5V – 9V – 12V – 15V @ 3A
- 20V @ 2.25A
- Maximum efficiency at full load:
- 90% @ ac input range
- No-load consumption (no cable plug-in):
- < 30mW @ 230Vac
- Energy efficiency meeting all DOE and UE CoC requirements
- Isolated quasi-resonant flyback topology with adaptive synchronous rectification
- Programmable output voltage and current protections
- Safety according to EN60065
- EMI according to EN55022 – Class B
- Compact form factor: 70 x 50 X 26.8 mm
- RoHS compliant
Read more: 5W USB TYPE-C POWER DELIVERY 3.0 ADAPTER REFERENCE DESIGN
- What certification does the EVLSTCH03-45WPD hold?
The board is a USB-IF certified solution. - How is voltage regulation achieved on the primary side?
Voltage regulation uses optocoupler feedback with a quasi-resonant flyback converter based on the STCH03 controller. - Which controller drives the gate of the secondary power MOSFET?
The SRK1001 adaptive synchronous rectification controller drives the gate of the STL110N10F7 MOSFET. - Does the system support programmable output voltages?
Yes, the design supports output profiles of 5V, 9V, 12V, 15V at 3A, and 20V at 2.25A. - What component provides ESD protection for the USB connector?
A Dual Transil array for ESD protection labeled ESDA25L protects against destructive electrostatic discharge. - Can the adapter operate with universal AC input?
Yes, it supports a universal AC input range from 90 to 264 Vac. - Is the maximum efficiency at full load specified?
The maximum efficiency at full load is 90% across the AC input range. - Does the design meet energy efficiency requirements?
Yes, it meets all DOE and UE CoC energy efficiency requirements.
