TEA1721FT: HV start-up flyback controller with integrated MOSFET for 5 W applications, f~burst = 1750 Hz

Overview

The TEA1721 is a small and low cost module Switched Mode Power Supply (SMPS) controller IC for low power applications (up to 5 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 circuit for start-up directly from the rectified mains voltage without any external bleeder circuits. The Burst mode frequency of 1750 Hz enables no-load power consumption below < 30 mW at high mains input.

Features

Low power SMPS controller for applications up to 5 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
USB battery charging and Energy Star 2.0 compliant
Jitter function for reduced EMI
Enables no-load power consumption < 30 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

Target Applications

White goods
Industrial
Smart meters
Mobile USB chargers
General-purpose adapters

Features

Low power SMPS controller for applications up to 5 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
USB battery charging and Energy Star 2.0 compliant
Jitter function for reduced EMI
Enables no-load power consumption < 30 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

Target Applications

White goods
Industrial
Smart meters
Mobile USB chargers
General-purpose adapters

TEA1721AT Block Diagram

sot1175-1_3d

TEA1721AT Block Diagram
sot1175-1_3d

TEA1721AT Block Diagram

sot1175-1_3d

Development Boards

TEA1721BDB1065 : TEA1721 universal mains white goods flyback SMPS demo board thumbnail

TEA1721BDB1065:TEA1721 universal mains white goods flyback SMPS demo board

TEA1721ADB1060 : TEA1721 Non-isolated buck/boost converter demo board thumbnail

TEA1721ADB1060:TEA1721 Non-isolated buck/boost converter demo board

TEA1721ADB1102 : TEA1721 Cubic Charger 5W demo board thumbnail

TEA1721ADB1102:TEA1721 Cubic Charger 5W demo board

TEA1721ADB1062 : TEA1721 Isolated 3-phase universal mains flyback converter demo board thumbnail

TEA1721ADB1062:TEA1721 Isolated 3-phase universal mains flyback converter demo board

TEA1721ADB1061 : Isolated universal mains flyback converter demo board thumbnail

TEA1721ADB1061:Isolated universal mains flyback converter demo board

TEA1721ADB1059 : TEA1721 Non-isolated buck converter demo board thumbnail

TEA1721ADB1059:TEA1721 Non-isolated buck converter demo board

Development Boards

TEA1721BDB1065 : TEA1721 universal mains white goods flyback SMPS demo board thumbnail

TEA1721BDB1065:TEA1721 universal mains white goods flyback SMPS demo board

TEA1721ADB1060 : TEA1721 Non-isolated buck/boost converter demo board thumbnail

TEA1721ADB1060:TEA1721 Non-isolated buck/boost converter demo board

TEA1721ADB1102 : TEA1721 Cubic Charger 5W demo board thumbnail

TEA1721ADB1102:TEA1721 Cubic Charger 5W demo board

TEA1721ADB1062 : TEA1721 Isolated 3-phase universal mains flyback converter demo board thumbnail

TEA1721ADB1062:TEA1721 Isolated 3-phase universal mains flyback converter demo board

TEA1721ADB1061 : Isolated universal mains flyback converter demo board thumbnail

TEA1721ADB1061:Isolated universal mains flyback converter demo board

TEA1721ADB1059 : TEA1721 Non-isolated buck converter demo board thumbnail

TEA1721ADB1059:TEA1721 Non-isolated buck converter demo board

.