200-W digital-power board for LED televisions

September 06, 2021 // By Jean-Pierre Joosting
200-W digital-power board for LED televisions
Beats the toughest Eco-design standards and combines a proven and reliable digital-power topology with the ability to configure and fine-tune the operating parameters for optimal performance.

The STEVAL-NRG011TV board from STMicroelectronics helps designers quickly build 200-W digital-power supplies and adapters for LED and OLED televisions to exceed the toughest energy-efficiency and standby regulations.

Based on the STNRG011 digital PFC (power-factor correction) and resonant LLC converter, the STEVAL-NRG011TV digital-power board combines a proven and reliable topology with the ability to configure and fine-tune the operating parameters for optimal performance. No coding is needed as the digital control algorithms are permanently programmed in the controller’s ROM and the board comes with a complete set of sample parameters stored in programmable non-volatile memory (NVM).

The STEVAL-NRG011TV provides a 12-V/4-A regulated output to power the television’s controller and audio subsystem and a 65-V/2.5-A output for LED backlighting. The wide AC input-voltage range, from 90-V to 264-V, allows use in power supplies and adapters to be marketed worldwide. The performance goes beyond today’s highest eco-design specifications, achieving full-load efficiency over 91% at 115-V and 230-V AC and no-load mains consumption below 120 mW.

The STNRG011 at the heart of the board provides a highly integrated solution for power-factor-corrected, high-efficiency converters. Included on-chip is an 8-bit CPU subsystem, control logic including PFC and LLC event-driven state machines (SMEDs), an analog-to-digital converter (ADC), high-voltage startup circuitry, power management, and protection. A two-wire interface handles communication with the external EEPROM as well as remote monitoring and software updates.

Housed in a 20-pin SO20 power package, this device enables a simplified board layout and compact dimensions.

www.st.com/resonantcontrollers


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