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HV start-up flyback controller with integrated MOSFET for 5 W 1. Product profile 1.1 General description (2012)
| Content Provider | CiteSeerX |
|---|---|
| Abstract | 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 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 TEA1721, 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 audible noise 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 below < 20 mW at high mains input. 1.2 Features and benefits Power features: Low power SMPS controller with integrated power switch designed for applications up to 5 W 700 V high voltage power switch for global mains operation Primary sensing for control of the output voltage 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 applications, 905 Hz burst frequency |
| File Format | |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Subject Keyword | Hv Start-up Flyback Controller General Description No-load Condition Integrated Mosfet High Voltage Power Switch Output Voltage Broad Output Voltage Range External Bleeder Circuit Integrated Power Switch Entire Load Range Minimum Number Burst Mode Frequency Energy Star Controller Ic External Component Low Power Smps Controller Burst Mode Control Operation Mode Usb Battery Charging Maximum Output Rectified Main Voltage Hz Burst Frequency Energy Saver State Current Source High Main Current Control Mode Regulated Voltage Source No-load Power Consumption Benefit Power Feature Power Level Power Consumption Low Power Converter Ultra-low Power Consumption Global Main Operation Primary Low Power Application Emi Application Low Power Level Audible Noise Additional Secondary Feedback Circuitry Compliant Jitter Function Burst Mode Flyback Converter Topology Minimum Cost |
| Content Type | Text |
