Summary of HIGH EFFICIENCY: A MULTI-MODE, FORCED-FREQUENCY-RESONANT DIGITAL CONTROLLER IC FOR SMPS APPLICATIONS
Infineon Technologies has introduced the XDP™ digital power controller XDPS21071, the first flyback controller with zero-voltage switching (ZVS) on the primary side, enhancing efficiency for fast-charging applications like USB-PD and QuickCharge. It features a high-voltage primary-side controller with integrated gate drivers, supports up to 140 kHz switching frequency, and utilizes a patented forced-frequency-resonant (FFR) digital algorithm for optimized multi-mode operation. The device ensures low switching losses, adapts to various load conditions, includes adaptive overcurrent protection, and complies with international efficiency standards and environmental regulations.
Parts used in the XDPS21071 Flyback Controller Project:
- XDPS21071 digital flyback controller IC
- High-voltage external MOSFET
- Low-voltage external MOSFET
- 600 V depletion startup unit (integrated)
- UART interface (for configuration)
Infineon Technologies launches the XDP™ digital power XDPS21071, the first flyback controller in the industry with zero-voltage switching (ZVS) on the primary side to achieve high efficiency. This controller is aimed at fast-charging applications such as USB-PD or QuickCharge. Light-load efficiency is optimized for variable output application.
The XDPS21071 is a high-performance digital flyback controller with an integrated dual-MOSFET gate driver and a 600 V depletion startup unit. The primary-side controller drives a high-voltage external MOSFET in a flyback topology and an external low-voltage MOSFET to create a pulse for achieving ZVS condition at the high-voltage MOSFET. It supports fixed-frequency switching up to 140 kHz.
The patented forced-frequency-resonant (FFR) switching scheme is implemented by means of a digital algorithm, which is configurable via parameter settings (UART port is included) to meet application requirements and the conversion efficiency of international regulatory standards (i.e., EU CoC version 5 Tier 2 and DoE Level VI). Ease of design and system optimization are made possible thanks to the intelligent, self-adaptive multi-mode operation that matches each line/load conditions with the best-fit operational mode (i.e., FFR, CrCM, burst mode) for unparalleled system performance. Hereby ZVS operation enables for lowest switching losses. Highest system performance is achieved by only a minimal adder in BOM cost. This controller comes with adaptive overcurrent protection. It is lead-free and RoHS compliant.
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