Power Integrations

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.

 

Power Integrations

Part supported:  BRD1265C
Kit part number:  RDK-964
Reference design for a 300 W 3-phase inverter using BRD1265C with IPH current information in field-oriented Control (FOC) operation

Power Integrations

Reference design kits (Click the part number for the specific device)

Part supported: BRD1260C
Kit part number: RDK-851
Reference design for a 50 W, three-phase inverter using the BRD1260C to drive a fan. 

Part supported: BRD1263C
Kit part number: RDK-852
Reference design for a 200 W, three-phase inverter using the BRD1263C. 

Part supported: BRD1265C
Kit part number: RDK-853
Reference design for a 300 W, three-phase inverter using the BRD1265C. 

Part supported: BRD1261C
Kit part number: RDK-872
Reference design for a 70 W, single-phase inverter using the BRD1261C to drive a fan.

Part supported:  BRD1260C
Kit part number: RDK-873
Reference design for a 30 W, single-phase BLDC motor inverter using the BRD1260C. 

Power Integrations

The RDK-710 is a board that implements the RDR-710 reference design report for a 12 W dual-output, open-frame power supply for appliances.

The output options are 5 V/1.4 A or 12 V/0.42 A from an input-voltage range of 85 V to 265 V ac. Featuring built-in synchronous rectification, the RDK-710 achieves efficiency of more than 85% at the nominal ac input. 

No-load input power is less than 10 mW. Standby input power is less than 260 mW at a 5 V/30 mA load. 

 

Video links

InnoSwitch3-TN for auxiliary power supplies

InnoSwitch3-TN for various power conversion topologies

Advantages of InnoSwitch3-TN offline power converter

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