STEVAL-GAN200CB [STMicroelectronics]

The STEVAL-GAN200CB reference design is based on STDES-200GANADP. It is a 19 V-200 W converter tailored for the typical specification of an AC-DC adapter for all-in-one systems, gaming applications, SMPS for LED TV, and lighting applications. It ensures a wide input main range, a very-low power consumption at light loads, and a good average efficiency.

The architecture is based on a two-stage approach: a front-end transition mode PFC preregulator and a downstream LLC resonant half-bridge converter. The PFC and LLC controllers are integrated in the STCMB1 combo IC.

The SRK2001A control implements the synchronous rectification.

The PFC section uses a proprietary and constant-on-time control methodology that does not require a sinusoidal input reference, reducing the system cost and external component count.

The LLC section is based on a proprietary time-shift control method. This improves dynamic behavior and input ripple rejection, resulting in a cleaner output voltage.

A higher efficiency is ensured thanks to the reduction of switching and conduction losses and to the elimination of reverse recovery loss thanks to the STPOWERGAN and MasterGaN application.

Users no longer need to take care of GaN driving complexity to enjoy the benefits of GaN technology, thanks to the highly integrated MASTERGAN1 IC, enhancing the robustness of the application and layout simplifications.

• Input voltage range: universal AC from 90 to 264 VAC with 47 Hz to 63 Hz frequency
• Output voltage: 19 VDC at 10.5 A continuous operation
• Maximum output power: 200 W
• Efficiency standards: meet CoC Tier 2 and DoE Level 6 efficiency requirements
• Full load Efficiency: > 94 % at 115 VAC and > 95 % at 230 VAC
• Efficiency at 250 mW > 50 %, compliant with EuP lot 6 Tier 2 limit for household and office equipment
• No load mains consumption: 118 mW at 230 VAC, below European CoC ver. 5 Tier 2 limit for external power supplies