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Texas Instruments UCC28911 | Demoboard PMP30026
Universal Input to 12V@1A PSR Isolated Flyback with Integrated 700V Switch Reference Design
Overview
| Topology | Flyback Converter |
| Input voltage | 90-265 V |
| Switching frequency | 105-125 kHz |
| Output 1 | 12 V / 1 A |
| IC revision | B |
Description
A quasi-resonant primary-side regulated isolated Flyback is used to provide 12V @ 1A from universal input voltage (90Vac to 264Vac). The converter does not employ any optocoupler and regulates the output voltage by sensing the auxiliary winding on primary side. A peak input voltage detector is used to sense input AC voltage, delivering 1/100 AC RMS equivalent voltage, with a +/-5% precision.
Features
Simple isolated PSR Flyback converter with integrated 700V FETCompact solution ("L" shaped PCB) supplies 12W with almost flat efficiency from 50mA to 1A load (75%...84%)Opto-less topology increases the reliability of the power supplyGood output voltage regulation versus load: +/-5% in the whole temperature range
Typical applications
- Home and Building Automation
- Smart plug, IoT, MCU and WiFi Power
- Power Metering Bias
- Aux power for TV, Server, White Goods
- Thermostat
- Bias Power for Smoke Alarm, Fire Alarm and
- Wall Adapters, Chargers for Mobile Phones
- LED Lighting
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT,10%(A) | fres(MHz) | Version | IR(A) | L(µH) | RDC max.(Ω) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 0.27 A, 2.3 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%0.27 A | Self Resonant Frequency2.3 MHz | VersionHeat Shrinking Tube | Rated Current0.25 A | Inductance1000 µH | DC Resistance6 Ω | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | MountTHT | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | VersionTHT | Rated Current0.5 A | Inductance20000 µH | DC Resistance1 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length15 mm | Width7.8 mm | Height17.5 mm | MountTHT |