These devices are said to be the industry’s first automotive-qualified switching power supply ICs to incorporate a silicon carbide (SiC) primary switching MOSFET. Delivering up to 70W of output power, the ICs are targeted for use in 600- and 800-volt battery and fuel-cell electric passenger vehicles, as well as electric buses, trucks and a wide range of industrial power applications.
Highly integrated InnoSwitch ICs help to reduce the number of components required to implement a power supply by as much as 50 percent, according to the company, saving significant circuit-board space, enhancing system reliability and mitigating component sourcing challenges.
Devices from the InnoSwitch family are available with a choice of cost-effective silicon, high-efficiency gallium nitride (GaN) and high-voltage SiC transistors, permitting designers to optimise their power solution across a broad range of consumer, computer, communications, industrial and automotive applications.
Offered in a compact InSOP-24D package, these ICs use a FluxLink feedback link, providing reinforced isolation up to 5000 VRMS for secondary-side control. FluxLink technology enables direct sensing of the output voltage, providing benefits such as accurate regulation and extremely fast transient response. The circuit will start from 30V without external circuitry – critical for functional safety. Additional protection features include input under-voltage, output over-voltage and over-current limiting.
The inclusion of synchronous rectification and a quasi-resonant (QR) / CCM flyback controller achieves greater than 90% efficiency, easily meeting the strictest OEM requirements. These new parts consume less than 15 mW at no-load, which is ideal for reducing self-discharge in battery management systems.
The InnoSwitch3-AQ 1700-volt parts are also suitable for industrial markets, where the integrated solution replaces discrete controller-plus-MOSFET designs, saving space, time and cost while increasing reliability in applications such as renewables, industrial motor drives, battery storage and metering.