www.power.com AUTOMOTIVE POWER 19 www.power-mag.com Issue 1 2024 Power Electronics Europe consuming less than 15mW at no-load, which is ideal for reducing self-discharge in battery management systems. A new design example, DER-953Q, is now available for download on the company’s website. This compact 100W power supply uses InnoSwitch3-AQ and eliminates the need for a 12V battery in EVs. Innoswitch The InnoSwitch family of ICs combines primary, secondary and feedback circuits in a single, surface mount off-line flyback switcher IC. The IC incorporates a high voltage, primary side switch, the primary side controller, a secondary side controller for synchronous rectification and FluxLink technology that eliminates the need for an optocoupler. FluxLink communication technology enables feedback information to be delivered across an isolation barrier without the use of any magnetic materials. FluxLink delivers a high communication bandwidth which enables a much faster load transient response. This proprietary technology meets all global noise immunity standards. For safety, it complies not only with UL and TUV global isolation standards but also the more stringent CQC 5,000 metre Chinese safety standard. InnoSwitch3-EP flyback off-line CV/CC QR flyback switcher ICs are available with a number of switch options: 725V and 750V silicon, 900V and the recently released 1,250V PowiGaN gallium nitride (GaN) devices, and a 1,700V silicon carbide (SiC) device. PowiGaN is Power Integrations’ internally developed GaN technology. PowiGaN switches replace the traditional silicon transistors on the primary side, reducing switching losses and enabling power supplies that are more efficient, smaller and lighter than silicon alternatives, says the company. PowiGaN-based ICs achieve up to 95% efficiency across the full load range and up to 100W in enclosed adapter implementations without requiring a heatsink. InnoSwitch3 designs’ ability to offer exceptional light load efficiency makes them ideal for providing auxiliary power in electric vehicles during low power sleep modes. The AEC-Q100-qualified InnoSwitch3-AQ family is particularly suitable for EVs based on 400V bus Figure 1: Definitions of EV types.
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