Startup Elevation Semiconductor Inc. (Irvine, Calif.) has developed GaN power ICs for fast charging applications.
These are the HL9550/52/54 for switched-mode power supplies and the HL9701 synchronous rectifier (SR) controller IC for switched-mode power supplies dedicated to the secondary side of flyback converters.
The primary applications for these high-performance controllers are USB PD quick chargers for smartphones and tablet PCs, power adaptors for portable devices, and flyback power supplies with fixed or variable output voltage applications.
The HL9550/52/54 support quasi-resonant (QR), discontinuous conduction mode (DCM), continuous conduction mode (CCM), and multiple frequency hybrid-mode operations. The frequency of operation includes 300kHz, 225kHz, 129kHz and 82kHz options.
The charger solution can cover a wide range of VDD operations without an additional clamp circuit for USB PD applications, as it helps to save BOM cost and PCB space. For protection, they include a function to limit input power and to avoid unexpected overpowering that would damage the system when the PD controller has failed.
The HL9701 drives the synchronous rectification MOSFET and is compatible with high-/low-side applications for QR, DCM, and CCM operations. It rectifies for secondary current, providing proprietary transient judgment to complete fast turn on/off control for maximum efficiency and high reliability at any load compared to the conventional ultra-fast diode or Schottky diode.
“Elevation is well-positioned to enable the next generation of advanced power systems and accelerate the world’s transition to electrification and sustainability,” said David Nam, CEO, in a statement.
The company was founded in April 2021.
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