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Power Electronics Europe News
 
AEC-Q100-qualified HV switcher ICs integrate 1700V SiC MOSFET
The AEC-Q100 qualified, 1700V-rated ICs are claimed to be the industry’s first automotive-qualified switching power supply ICs to incorporate an SiC primary switching MOSFET. Delivering up to 70W, the ICs are suitable for use in 600V and 800V battery and fuel cell electric passenger vehicles, electric buses, trucks and a range of industrial power applications.

The integrated InnoSwitch ICs reduce the number of components required to implement a power supply by as much as 50%, claims the company, saving circuit board space, enhancing system reliability and mitigating component sourcing challenges.

Devices from the InnoSwitch family are now available with a choice of cost-effective silicon, high-efficiency gallium nitride (GaN) and high-voltage SiC transistors. Designers can optimise their power design across a range of consumer, computer, communications, industrial and automotive applications.

Peter Vaughan, director of automotive business development at Power Integrations said: "800-volt batteries are becoming standard for EVs. Multiple vehicle systems are connected to this powerful electrical source, yet delicate electronic control circuits require just a few volts for operation and communication. InnoSwitch devices allow the electronics to safely sip from the firehose of energy available on the main bus, using minimal board area and without wasting energy”.

These ICs also simplify the emergency power supply for the main traction inverter, which may be required to operate from 30 to 1000V, at a moment’s notice. Vaughan says this is a particularly exciting development: “Our SiC-based InnoSwitch3-AQ devices handle this vast range with incredible ease.”

The ICs are offered in a compact InSOP-24D package and use a FluxLink feedback link, providing reinforced isolation up to 5000V RMS for secondary-side control. FluxLink technology enables direct sensing of the output voltage, providing accurate regulation and extremely fast transient response, says Power Integrations. The circuit will start from 30V without external circuitry, which is critical for functional safety. The ICs also have input under-voltage, output over-voltage protection and over-current limiting.

A synchronous rectification and a quasi-resonant (QR) / CCM flyback controller achieves greater than 90% efficiency, confirms the company, in order to meet the strictest OEM requirements. The new ICs consume less than 15mW at no-load, which reduces self-discharge in battery management systems.

The InnoSwitch3-AQ 1700V parts are also suitable for industrial markets, where the integrated solution replaces discrete controller-plus-MOSFET designs. This not only saves space, time and cost, says the company, but also increases reliability in applications such as renewables, industrial motor drives, battery storage and metering.

A reference design, DER-913Q, and hardware kit RDK-919Q, are available to evaluate the InnoSwitch3-AQ 1700V IC.

The ICs are available from Power Integrations’ sales representatives or authorised worldwide distributors: Digi-Key, Farnell, Mouser and RS Components.

  

 



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