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1. General description

The TEA2226AT is a digital configurable controller for high-efficiency resonant power

supplies. The power supply is easy to design and has a very low component count. It

meets the efficiency regulations of Energy Star, the Department of Energy (DoE), the

Eco-design directive of the European Union, the European Code of Conduct, and other

guidelines. So, no auxiliary low-power supply is required.

To increase the efficiency of a low-voltage supply output, the TEA2095T dual SR

controller can be added on the secondary side.

In contrast to traditional resonant topologies, the TEA2226AT achieves a high efficiency

at low loads due to the low-power mode. This mode operates in the power region

between continuous switching (also called high-power mode) and burst mode.

Because the TEA2226AT is regulated via the primary capacitor voltage, it has accurate

information about the power delivered to the output. The measured output power defines

the mode of operation (burst mode, low-power mode, or high-power mode).

The TEA2226AT contains a low-voltage die with a fully digital controller for output power

control, start-up, initializations, and protections. These protections include overcurrent

protection (OCP), overvoltage protection (OVP), and capacitive mode regulation (CMR).

The TEA2226AT also contains a high-voltage silicon-on-insulator (SOI) controller for

high-voltage start-up, integrated drivers, level shifter, protections, and circuitry that

ensures zero-voltage switching.

The TEA2226AT LLC controller enables the building of an easy to design, highly efficient,

and reliable power supply. The power supply can provide 90 W to 1000 W output power

with a minimum of external components. It has a very low no-load input power (< 75 mW)

and a high efficiency from minimum to maximum load. So, no additional low-power

supply is required, which ensures a significant system cost saving and a highly simplified

power supply design, while meeting the latest power supply guidelines and regulations.

2. Features and benefits

2.1 Distinctive features

? LLC controller in a single small-size SO16 package

? Integrated high-voltage start-up

? Integrated drivers and high-voltage level shifter (LS)

? High-side driver directly supplied from the low-side driver output

? Integrated X-capacitor discharge without additional external components

? Power good function

? Several parameters can easily be configured during evaluation with use of the

graphical user interface (GUI), like:

– Operating frequencies to be outside the audible area at all operating modes

– Soft start and soft stop in burst mode, reducing the audible noise

– Accurate transition levels between operation modes (high-power mode/low-power

mode/burst mode)

– Enabling/disabling the lower power mode

2.2 Green features

? Zero voltage switching for minimum switching losses

? Extremely high efficiency from low load to high load

? Compliant with latest energy-saving standards and directives (Energy Star, EuP)

? Excellent no-load input power (< 75 mW for TEA2226AT/TEA2095T combination)

2.3 Protection features

? Independently configurable levels and timers

? Many protections can independently be set to latched, safe restart, or latched after

several attempts to restart

? Supply undervoltage protection (UVP)

? Overpower protection (OPP)

? Internal and external overtemperature protection (OTP)

? Capacitive mode regulation (CMR)

? Accurate overvoltage protection (OVP)

? Overcurrent protection (OCP)

? Brownin/brownout protection

? Disable input

? Input to reset all protections

3. Applications

? Printers

? Desktop and all-in-one PCs

? Gaming power supplies

? LCD television

? Notebook adapters and general-purpose adapters

? Server

? 5G supplies

? UHD LED television