NXP TEA1723FT

Beschreibung

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 rectifieduniversal mains input. The device includes a high voltage power switch (700 V) and hasbeen optimized for flyback converter topologies to provide high-efficiency over the entireload 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 maximumoutput current and operates as current source that delivers the maximum current over abroad output voltage range. Using the TEA1723, a low power converter can be built atminimum cost and with the minimum number of external components.The controller regulates the output voltage with primary-side sensing which eliminates theneed for an additional secondary feedback circuitry and simplifies the design. At higherpower levels, a frequency and current control mode is used. It operates with burst modecontrol at low power levels and no-load condition. The burst mode minimizes audiblenoise and provides an energy saver state which reduces the power consumption inno-load condition. The Burst mode frequency of 1750 Hz enables no-load powerconsumption < 53 mW at 230 V (AC) mains input.

Eigenschaften

Power features:

• Low power SMPS controller with integrated power switch designed for applications up to 11 W
• 700 V high voltage power switch for global mains operation
• Primary sensing for control of the output voltage without optocoupler and secondaryfeedback circuitry
• Minimizes audible noise in all operation modes
• Energy Star 2.0 compliant
• Jitter function for reduced EMIGreen features:
• Enables no-load power consumption below < 53 mW
• Very low supply current in no-load condition with energy saver mode
• Incorporates a high voltage start-up circuit with zero current consumption under normal switching operation
• Available in halogen-free and Restriction of Hazardous Substances (RoHS) SO7 package

Green features:

• Enables no-load power consumption below < 53 mW
• Very low supply current in no-load condition with energy saver mode
• Incorporates a high voltage start-up circuit with zero current consumption under normal switching operation
• Available in halogen-free and Restriction of Hazardous Substances (RoHS) SO7 packageProtective functions:
• OverVoltage Protection (OVP) on Feedback control (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 operation

  -Open and short-circuit protection of the Feedback control (FB) pin

• Short-circuit protection of the charger output

Typische Anwendungen

• Chargers for smartphones and media tablets
• General-purpose adapters
• White goods
• Smart meters
• Industrial

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers