Summary of HIGH EFFICIENCY: A MULTI-MODE, FORCED-FREQUENCY-RESONANT DIGITAL CONTROLLER IC FOR SMPS APPLICATIONS
Infineon Technologies launched the XDP™ digital power XDPS21071, a primary-side flyback controller with integrated dual-MOSFET gate driver and 600 V depletion startup, offering industry-first primary-side zero-voltage switching (ZVS) to maximize efficiency for fast-charging apps like USB-PD and QuickCharge. It supports fixed-frequency switching up to 140 kHz and implements a patented forced-frequency-resonant (FFR) digital algorithm, with configurable parameters via UART. The controller features self-adaptive multi-mode operation (FFR, CrCM, burst), adaptive overcurrent protection, and targets regulatory efficiency standards while minimizing BOM cost; it is lead-free and RoHS compliant.
Parts used in the XDPS21071 Project:
- XDPS21071 digital flyback controller IC
- High-voltage external MOSFET (primary-side)
- Low-voltage external MOSFET (to create ZVS pulse)
- 600 V depletion startup unit (integrated in IC)
- Dual-MOSFET gate driver (integrated in IC)
- UART interface for configuration
- Flyback transformer and associated passive components (inductor, capacitors, resistors)
- PCB and connectors for USB-PD or QuickCharge applications
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.
Read more: HIGH EFFICIENCY: A MULTI-MODE, FORCED-FREQUENCY-RESONANT DIGITAL CONTROLLER IC FOR SMPS APPLICATIONS
- What is the primary innovation of the XDPS21071?
It is the first flyback controller with primary-side zero-voltage switching (ZVS) in the industry to achieve high efficiency. - What applications is the XDPS21071 aimed at?
It is aimed at fast-charging applications such as USB-PD and QuickCharge. - What switching frequency does the controller support?
It supports fixed-frequency switching up to 140 kHz. - How does the controller achieve ZVS?
The primary-side controller drives a high-voltage external MOSFET and an external low-voltage MOSFET to create a pulse that achieves ZVS at the high-voltage MOSFET. - What switching scheme does the XDPS21071 implement?
It implements a patented forced-frequency-resonant (FFR) switching scheme via a digital algorithm. - Can the controller operation be configured?
Yes, the digital algorithm is configurable via parameter settings and a UART port is included for configuration. - What operating modes does the XDPS21071 support?
It supports self-adaptive multi-mode operation including FFR, CrCM, and burst mode to match line and load conditions. - Does the controller include protection features?
Yes, the controller comes with adaptive overcurrent protection. - Is the XDPS21071 compliant with environmental and regulatory standards?
It is lead-free, RoHS compliant, and designed to meet efficiency regulatory standards such as EU CoC version 5 Tier 2 and DoE Level VI.
