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Texas Instruments UCC28911DR | Demoboard PMP23199
UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control
Overview
| Topology | Flyback Converter |
| Input voltage | 90-265 V |
| Output 1 | 3.3 V / 0.35 A |
| IC revision | B |
Description
The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltage and current regulation without the use of an optical coupler. Both devices incorporate a 700-V power FETand a controller that process operating information from the flyback auxiliary winding and power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enable the very low stand-bypower consumption. Control algorithms in the UCC28910 and UCC28911,combining switching frequency and peak primarycurrent modulation, allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses. Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter cost.
Features
- Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
- ±5% Output Voltage Regulation Accuracy
- ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
- 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
- 115-kHz Maximum Switching Frequency Design for High-Power Density
- Valley Switching and Frequency Dithering to Ease EMI Compliance
- Thermal Shut Down
- Low Line and Output Over-Voltage Protection
Typical applications
- Smart plug, Chargers for Mobile Phones
- IoT, MCU, Wall Adapters, Home and Building Automation, Power Metering Bias
- Aux power for TV, Server, White Goods, WiFi Power, Bias Power for Smoke Alarm, Fire Alarm and Thermostat
- LED Lighting
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | C | VR(V (DC)) | Endurance(h) | IRIPPLE(mA) | RESR(mΩ) | ILeak(µA) | DF(%) | Ø D(mm) | L(mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 100 µH, 1.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Inductance100 µH | Rated Current1.1 A | Saturation Current @ 10%1.2 A | DC Resistance1 Ω | Self Resonant Frequency9.4 MHz | VersionHeat Shrinking Tube | – | – | – | – | – | – | – | – | Length8.5 mm | – | ||||
 | WCAP-PSLP Aluminum Polymer Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-PSLP Aluminum Polymer Capacitors | – | – | – | – | – | – | Capacitance82 µF | Rated Voltage16 V (DC) | Endurance 2000 | Ripple Current2200 mA | ESR35 mΩ | Leakage Current400 µA | Dissipation Factor8 % | Diameter6.3 mm | Length5.8 mm | Packaging15" Tape & Reel | ||||
750319943 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |