Forced Quasi Resonant ZVS flyback controller
Introduction
3
Introduction
The XDPS21081 is a digital AC/DC current-mode controller for high density adapter applications. The IC provides a
configurable multi-mode operation controlled by the feedback signal from the secondary side control loop. The multi-mode
operation supports different operation modes like Quasi-resonant (QR) mode, FQR ZVS mode, (see chapter 4.2.12) or burst
mode, frequency reduction mode depending on line and load conditions. With supporting those modes high power density
designs can be dressed in a very flexible manner.
An embedded application specific digital core provides advanced algorithms for the multi-mode operation and a variety of
protection features. Special analog and mixed-signal peripherals are integrated to support the requirements for low stand-
by power.
The IC supports highest design flexibility in the application by means of an advanced set of configurable parameters and
state machines, which supports very dedicated system dimensioning. The configuration can be done via a single pin UART
interface at GPIO pin that supports in-circuit configuration. Chapter 5 contains the parameter default configuration setting
for XDPS21081 and the correlated specific firmware version. Furthermore, it provides a mapping table for the defined FW
symbols and the correlated data sheet parameters. Each listed parameter is specified in the electrical characteristics
Chapter 6.
The following functional description in Chapter 4 is based on the default parameter setting in the configuration Chapter 5.
Chapter 7.1 provides information about the package outline and dimensions.
An appendix Chapter 9 provides additional information about specific electrical characteristics or test conditions.
The reference Chapter 10 provides an overview about correlated documents.
Data Sheet
6
Revision 2.0
2020-08-20
INFINEON [ Infineon ]
