NXP TEA1723BT

Description

The TEA1723 is a small and low cost module Switched Mode Power Supply (SMPS)controller IC for power applications (up to 11 W) and operates directly from the rectified universal mains input. The device includes a high voltage power switch (700 V) and has been optimized for flyback converter topologies to provide high-efficiency over the entire load range with ultra-low power consumption in the no-load condition. It provides a circuitfor start-up directly from the rectified mains voltage without any external bleeder circuits.

The converter operates as a regulated voltage source from no-load up to the maximum output current and operates as current source that delivers the maximum current over a broad output voltage range. Using the TEA1723, a low power converter can be built at minimum cost and with the minimum number of external components.

The controller regulates the output voltage with primary-side sensing which eliminates the need for an additional secondary feedback circuitry and simplifies the design. At higher power levels, a frequency and current control mode is used. It operates with Burst mode control at low power levels and no-load condition. The burst mode minimizes audiblenoise and provides an energy saver state which reduces the power consumption in no-load condition. The Burst mode frequency of 905 Hz enables no-load power consumption < 25 mW at 230 V (AC) mains input.

Features

• Low power SMPS controller for applications up to 11 W
• 700 V high voltage power switch for global mains operation
• Primary sensing without optocoupler and secondary feedback circuitry
• Minimizes audible noise in all operation modes
• Energy Star 2.0 compliant
• Jitter function for reduced EMI
• Enables no-load power consumption < 25 mW
• Very low supply current in no-load condition with energy saver mode
• High voltage start-up circuit with zero current consumption during switching
• Available in halogen-free and (RoHS) SO7 package
• OverVoltage Protection (OVP) on supply pin and on (FB) pin with auto-restart
• UnderVoltage LockOut (UVLO) protection on IC supply pin
• OverTemperature Protection (OTP)
• Soft-start by reduced peak current for zero and low output voltage
• Demagnetization protection for guaranteed discontinuous conduction mode
• Open and short-circuit protection of the Feedback control (FB) pin

Typical applications

• Power supply for white goods applications
• Standby supply for TV, desktop PC and set-top boxes
• Battery chargers for cellular phones, tablet pc and other power adapters up to 11 W

More information

• Datasheet
• IC product information