Review the LinkSwitch-TN2Q Non-Isolated Buck Power Supply RDK-707Q

Table of contents

Do you design power supplies or interested in learning more? Then you may be interested in testing this non-isolated, off-line, power supply kit that beats the performance of linear or cap-dropper designs.

The RDK-707Q is a buck converter designed to provide a non-isolated nominal output voltage of 15 V at 650 mA load from a wide input voltage range of 30 VDC to 550 VDC. Typical automotive applications include bias supplies for active discharge blocks within on board chargers and traction inverters, pyro disconnect in battery packs, control power for HVAC compressors, PTC auxiliary heaters and body control modules. This power supply utilizes the LNK3209GQ from the LinkSwitch-TN2Q family of automotive ICs.

What is the LinkSwitch-TN2Q?

The LinkSwitch-TN2Q family of ICs for automotive power supplies provide significant reduction in component count compared to traditional discrete solutions making it highly reliable. The device family supports buck, buck-boost and flyback converter topologies. Each device incorporates a 750 V power MOSFET, oscillator, On/Off control, a high-voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and output and overvoltage protection circuitry onto a monolithic IC. 

LinkSwitch-TN2Q ICs consume very little current in standby resulting in power supply designs that meet <50 mW no-load input at 400 VDC input. A full suite of protection features enable safe and reliable power supplies protecting the device and the system against input and output overvoltage faults, device over-temperature faults, lost regulation, and power supply output overload or short-circuit faults.

Features

Highest Performance and Design Flexibility

• Supports buck, buck-boost and flyback topologies
• Excellent load and line regulation
• Selectable device current limit
• 66 kHz operation with accurate current limit
• Allows the use of low-cost off-the-shelf inductors
• Reduces size and cost of magnetics and output capacitor
• Frequency jittering reduces EMI filter complexity
• Pin-out simplifies PCB heat sinking

Enhanced Safety and Reliability Features

• Auto-restart for short-circuit and open loop faults
• Output overvoltage protection (OVP)
• Line input overvoltage protection (OVL)
• Hysteretic over-temperature protection (OTP)
• Extended creepage between DRAIN pin and all other pins improves field reliability
• 750 V MOSFET rating for excellent surge withstand

EcoSmart – Extremely Energy Efficient

• Standby supply current <100 μA
  On/Off control provides constant efficiency over a wide load range
  Easily meets all global energy efficiency regulations
  No-load consumption <50 mW

RoadTester Poll

Documentation

• Datasheet
• LinkSwitch-TN2Q
• LNK3209GQ

RoadTester Instructions

Working with the documentation, open the box and test the out of the box experience. Show the reader of this review what you discovered utilizing text, images, videos, and/or any other media, so the reader understands what is involved in using the product.

Important Dates

About Power Integrations

Power Integrations, Inc., is a leading innovator in semiconductor technologies for high-voltage power conversion. Our 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 a vast range of applications including appliances, mobile devices, computers and countless industrial applications. To learn more, go here.

Terms and Conditions

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