Automotive 900 V GaN-based flyback switcher ICs increase power and efficiency
The InnoSwitch3™-AQ ICs from Power Integrations feature robust and efficient PowiGaN gallium nitride (GaN) switches for use in 400 V automotive auxiliary power supplies supporting loads of up to 100 W.
InnoSwitch3-AQ flyback converter ICs from Power Integrations have a 900 V breakdown voltage rating and provide a highly efficient solution for high-voltage dc-dc conversion in automotive systems.
The INN3997CQ and INN3999CQ, which feature the proprietary Power Integrations PowiGaN™ power switch technology, supply up to 100 W at more than 93% efficiency, eliminating the need for heat-sinks, and streamlining the design of space-constrained products. InnoSwitch3-AQ-based designs also offer very high light-load efficiency, making the switcher ICs ideal in electric vehicle (EV) auxiliary power systems that support low-power sleep modes.
The AEC-Q100 qualified InnoSwitch3-AQ series is particularly suitable for EVs that operate from a 400 V bus. The 900 V PowiGaN switch provides more power, a higher design margin and better efficiency than silicon-based converters. The 900 V PowiGaN switch can easily handle inductive noise spikes, yet can also operate from a voltage as low as 30 V dc, enabling systems to meet the active discharge requirements of functional safety specifications.
The 900 V InnoSwitch3-AQ devices are off-line, constant voltage/constant current flyback switcher ICs which perform synchronous rectification, while the flyback controller implements valley-switching discontinuous conduction mode and continuous conduction mode conversion. The InnoSwitch3-AQ family combines primary and secondary controllers and safety-rated feedback into a single IC, providing for accurate output-voltage regulation even with a very wide input-voltage range.
The Power Integrations FluxLink™ communication technology enables the IC package to bridge the isolation barrier, optimizing efficiency and eliminating the need for optocouplers.