Power Integrations

Power Integrations

The RDR-1016 reference design board from Power Integrations implements a flyback converter which provides a dual isolated output voltage of 12V at 2A, and 5V at 500mA, from a wide input-voltage range of 85V to 265V ac. The power supply is based on the TNY5073K flyback converter, a member of the TinySwitch-5 family of ICs. 

The board achieves peak efficiency of at least 87% at full load with a 230V ac input. Average efficiency across the load range is at least 85%. 

The RDR-1016 conforms to the requirements of the CISPR22B/EN55022B standards for conducted EMI emissions. It is specified for operation at an ambient-temperature range of 0°C to 40°C with free-air convection cooling.

Power Integrations

The RDK-1002 from Power Integrations is a reference design kit which facilitates development with the InnoSwitch™5-Pro family of flyback switcher ICs. It implements a USB Power Delivery 3.1 extended power range (EPR) power supply supporting loads up to 140 W. It operates from an input-voltage range of 90 V to 265 V ac, and achieves conversion efficiency of up to 95%. It supports variable output voltages in a range from 5 V to 28 V.

 

Power Integrations

The RDK-747 reference design kit from Power Integrations demonstrates a design for a 20 V/3.25 A output charger using the InnoSwitch™3-EP with a 750 V PowiGaN™ power switch. This design shows the high power density and efficiency achieved when using the highly integrated InnoSwitch3-EP ac-dc power converter. 

The InnoSwitch3-EP, the industry’s first ac-dc converter IC with isolated, safety-rated integrated feedback, offers all the benefits of secondary-side control with the simplicity of primary-side regulation. Insensitive to transformer variation, the converter features built-in synchronous rectification for high efficiency. The design meets the requirements for compliance with DOE6 and CoC Tier 2 V5 2016.

Power Integrations

The RDK-877 reference design describes an isolated flyback converter which provides a nominal output voltage of 12 V at 0.5 A load from a wide input-voltage range of 90 V to 305@nbsp;V ac, as well as an isolated zero-crossing detection signal. 

This power supply uses the LNK3306D from the LinkSwitch-TNZ family of ICs. The kit contains the complete power-supply specifications, bill-of-materials, transformer construction, circuit schematic and PCB layout, along with performance data and electrical waveforms.

 

Power Integrations

The RDK-866 reference design describes a non-isolated buck converter power supply with an input-line zero-crossing detection output signal. The nominal output is 5 V/500 mA across the input range of 90 V to 300 V ac. 

The system is powered by the LinkSwitch-TNZ IC controller. The LinkSwitch-TNZ family of ICs combines power conversion with lossless generation of an ac zero-crossing signal used typically for system clock and timing functions. The device incorporates a 725 V power MOSFET, oscillator, a high-voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and output and input overvoltage protection circuitry in a monolithic IC. 

Designs using the highly integrated LinkSwitch-TNZ ICs are more flexible than discrete implementations, reducing component count by 40% or more. The key design goal is low cost, low audible noise and compact form factor for use in wireless and relay power supplies.

Power Integrations

The RDK-919Q is a development board for the INN3949CQ, a member of the InnoSwitch3-AQ family of power conversion ICs. Operating from an input-voltage range of 50 V to 1000 V dc, ideal for use in 800 V bus systems, the board provides an isolated power supply for loads of up to 60 W, at an output voltage of 24 V. Conversion efficiency is 82%. 

The RDK-919Q works in hot conditions: at 85°C, it can provide a continuous 20 W output with an input at 1,000 V dc. 

The board offers all the benefits of secondary-side control with the simplicity of primary-side regulation: it is insensitive to transformer variation, and provides extremely fast transient response which is independent of load timing. The maximum output ripple voltage is 240 mV.

 

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