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General description

The TEA2017ABT is a digital configurable LLC and PFC combo controller for highefficiency

resonant power supplies. It includes the LLC controller and a PFC controller

that works in DCM/QR mode. The TEA2017ABT enables building a complete resonant

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

TEA2017ABT comes in a low profile and narrow body-width SO16 package.

The TEA2017ABT digital architecture is based on a high-speed configurable hardware

state machine ensuring very reliable real-time performance. During the power supply

development, many operation and protection settings of the LLC and PFC controller

can be adjusted by loading new settings into the device to meet specific application

requirements. The configurations can be fully secured to prevent unauthorized copying of

the proprietary TEA2017ABT configuration content.

In contrast to traditional resonant topologies, the TEA2017ABT shows a very high

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

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

Because the TEA2017ABT regulates the LLC output voltage of the system via the

primary capacitor voltage, it has accurate information about the power delivered to the

output. This measured output power defines the mode of operation (burst mode, lowpower

mode, or high-power mode). The transition levels of the operating modes can be

easily programmed into the device.

The TEA2017ABT contains all protections like overtemperature protection (OTP),

overcurrent protection (OCP), overvoltage protection (OVP), overpower protection (OPP),

open-loop protection (OLP), and capacitive mode regulation (CMR). Each of these

protections can be configured independently and accurately by programming parameters

inside the device.

The device contains a low-voltage and a high-voltage silicon technology for high-voltage

start-up, integrated drivers, level shifter, protections, and circuitry assuring zero-voltage

switching.

The TEA2017ABT/TEA2095T combination gives an easy to design, highly efficient, and

reliable power supply, providing 90 W to 500 W, with a minimum of external components.

The system provides a very low no-load input power (< 75 mW; total system including the

TEA2017ABT/TEA2095T combination) and high efficiency from minimum to maximum

load. This power supply meets the efficiency regulations of Energy Star, the Department

of Energy, the Eco-design directive of the European Union, the European Code of

Conduct, and other guidelines. So, any auxiliary low-power supply can be omitted.

To enhance readability, only typical values are given in this document, except in the

parametric tables (Section 9, Section 10, and Section 11). If values in the text differ from

the values for the same parameter in the parametric tables, the values in these tables are

leading.

Features and benefits

2.1 Distinctive features

? Complete functionality of a PFC and 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

? Accurate boost voltage regulation

? PFC that works in DCM/QR mode

? Integrated X-capacitor discharge without additional external components

? Power good function

? PFC jitter for optimized EMI performance

? Excellent power factor (PF) and total harmonic distortion (THD), as the PFC current

compensates for the input filter current

? 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

? Can easily be combined with an external standby supply

2.2 Green features

? Valley/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 TEA2017ABT/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)

? Inrush current protection (ICP)

? Brownin/brownout protection

? Disable input

? Input to reset all protections

Applications

? Desktop and all-in-one PCs

? Gaming power supplies

? LCD television

? Notebook adapters and general-purpose adapters

? Printers