Integrated circuit manufacturer Power Integrations has unveiled a 900 V gallium-nitride (GaN) addition to its InnoSwitch3 line of flyback switcher ICs. The company says the new ICs deliver up to 100 W with 93% efficiency, eliminating the need for heat sinks and simplifying space-constrained application design.
The new 900 V InnoSwitch3-EP and InnoSwitch3-AQ off-line CV/CC flyback switcher ICs use synchronous rectification, valley switching, and DCM/CCM flyback controllers. FluxLink communication technology lets the IC package bridge the isolation barrier, increasing efficiency and eliminating the need for optocouplers. InnoSwitch3-EP devices are designed to protect against line over- and under-voltage, output over-voltage, and over-current and over-temperature shutdown. Automotive InnoSwitch3-AQ devices can produce 100 W from a 400 V bus, and offer performance and protection similar to the popular 1,700-volt silicon-carbide ICs used in 800-volt EV systems.
“The dominant bus voltage for EVs is 400 V,” stated Peter Vaughan, Power Integrations Automotive Business Development Director. “EV manufacturers are optimizing their new generation of 400 V systems and re-engineering various power stages in the vehicle, such as the on-board charger. The 900 V PowiGaN switch is extremely beneficial because it easily accommodates inductive noise spikes and operates from as low as 30 V DC.”
Source: Power Integrations