Increased efficiency of display power supplies with new technology

Power Integrations has announced the release of the InnoMux chipset for display power supplies. The unique single-stage power architecture of the chipset decreases losses in display applications by improving overall efficiency in constant-voltage and constant-current LED backlight driver stages by 50% opposed to conventional solutions, achieving up to 91% efficiency. Also, TV and monitor designers can achieve over 50% reduction in component count, decreasing manufacturing cost and giving an associated improvement in board reliability. The new chipset comprises of an InnoMux controller IC partnered with an InnoSwitch3-MX isolated switcher IC. The switcher IC is the latest addition to company’s flyback switcher IC families, connecting the primary FET, the primary-side controller, a secondary-side controller for synchronous rectification, and FluxLink high-speed communications technology, which removes the necessity for an optocoupler. The switcher receives control information from the InnoMux IC, which measures the load requirements independently of each output and directs the switcher to produce the right amount of power to each of the outputs to control accurate regulation of current or voltage; this removes the load and cross-regulation difficulties seen with conventional multi-output power supplies, making post-regulators irrelevant. Overall power conversion efficiency improves by 10%, eliminating the requirement for heatsinks and removing hotspots while easing compliance with the upcoming ENERGY STAR 8.0 display specification and the new CEC power-consumption standard scheduled to take effect in July 2019. Comments Edward Ong, product marketing manager at Power Integrations: “Developers can leverage InnoMux’s power conversion efficiency in two ways: they can develop highly efficient monitors and TVs to meet manufacturer targets and regional regulatory mandates, or they can downgrade the efficacy, and therefore the cost, of their display panel by using less expensive LEDs and simpler, cheaper, diffusers while still meeting upcoming ENERGY STAR 8.0 rules.”