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HV Start-Up Flyback Controller with Integrated MOSFET for 5 W Applications, F~burst = 430 Hz
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 905 Hz enables no-load power consumption below < 20 mW at high mains input.
sot1175-1_3d
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 < 20 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
- White goods
- Industrial
- Smart meters
- Mobile USB chargers
- General-purpose adapters
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