Furthermore, television and monitor designers can achieve a reduction of more than 50% in the number of components, reducing manufacturing costs and providing an associated improvement in board reliability.
The new chipset consists of an InnoMux controller IC paired with an InnoSwitch™ 3-MX isolated switching IC. The InnoSwitch3-MX is the latest addition to Power Integrations' flyback switching IC families, combining the primary FET, primary-side driver, secondary-side driver for synchronous rectification, and FluxLink™ high-speed communication technology, eliminating the need for an optocoupler. The InnoSwitch3-MX receives control information from the InnoMux IC, which independently measures the load requirements of each output and directs the InnoSwitch3-MX to deliver the correct amount of power to each output to maintain precise current or voltage regulation. This eliminates the loading and cross-regulation challenges seen with conventional multi-output power supplies, making downstream regulators unnecessary. Overall energy conversion efficiency increases by 10%, eliminating the need for heat sinks and eliminating hotspots while facilitating compliance with the upcoming ENERGY STAR® 8.0 display specification and the new CEC energy consumption standard scheduled to come into effect in July 2019.
Only InnoMux technology supports simultaneously precisely regulated constant current and constant voltage outputs, providing one to four constant current channels and up to two constant voltage outputs. This flexibility accommodates the logic, audio, and LED requirements typically found in TVs and monitors. The IC provides overload protection for each output. InnoMux technology also supports sophisticated dimming on the DC LED output: analog, PWM, interleaved, and hybrid dimming are controlled via dedicated analog and PWM control pins, enabling precise dimming down to 1.5%.
Comments from Edward Ong, product marketing manager at Power Integrations: “Developers can leverage InnoMux’s energy conversion efficiency in two ways: they can develop highly efficient monitors and TVs to meet manufacturer targets and local regulations, or they can reduce the efficiency and therefore the cost of their display panel by using less expensive LEDs and simpler, cheaper diffusers, while still meeting the upcoming ENERGY STAR 8.0 specifications.”.
Two reference designs are available: DER-635 and DER-636. DER-636 describes a 40W power monitoring power supply with one constant voltage output and four constant current outputs. DER-635 is a 45W power supply that supports TV applications, providing two constant voltage (CV) and one constant current (DC) outputs.
