InnoSwitch3-TN ICs gets tough on energy waste in appliance power supplies
Power Integrations has introduced the integrated InnoSwitch 3-TN off-line, CV/CC flyback switcher IC. Offered in a safety-qualified, compact MinSOP-16A package, and incorporating a 725V primary MOSFET, isolated feedback, synchronous rectification and secondary-side control, InnoSwitch3-TN ICs helps in the design of power supplies and are suitable for appliance and industrial auxiliary applications up to 21W.
The advanced InnoSwitch3-TN flyback controller delivers constant efficiency across the load range and less than 5mW no-load consumption, according to Power Integrations. The flexibility provided by FluxLink communication technology means that positive and negative outputs can be easy to achieve. InnoSwitch3-TN ICs can be used in a 5 V single-output power supply, with two positive output rails, or with both positive and negative rails, without any external feedback components.
Safety-rated FluxLink technology also helps to achieve reliable synchronous rectification and accurate constant voltage and constant current on the output. The low forward drop of the SR MOSFET also aids cross-regulation performance. Safety features include output over-current and over-temperature protection. The small MinSOP package and low number of external components required for a full PSU design suits InnoSwitch3-TN to compact implementations.
Silvestro Fimiani, senior product marketing manager at Power Integrations, said: “Our new InnoSwitch3-TN devices support the high output current needed in smart-connected appliances at efficiencies of up to 90 per cent, compared to traditional approaches such as buck regulators that are often less than 60 per cent efficient. InnoSwitch3-TN ICs incorporate all feedback components while supporting isolated, non-isolated, single and multi-output designs for the most compact, flexible auxiliary power supply solution.”
Reference design RDK-710 is available for designers who are interested in evaluating InnoSwitch3-TN ICs. Devices are priced at $0.50 in volume production quantities.
Power Integrations is a leading innovator in semiconductor technologies for high-voltage power conversion. The company’s products are key building blocks in the clean-power ecosystem, enabling the generation of renewable energy as well as the efficient transmission and consumption of power in applications ranging from milliwatts to megawatts.
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