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Texas Instruments UCC28910
700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control
Overview
| Topology | Flyback Converter |
| Input voltage | 120-375 V |
| Switching frequency | 105-125 kHz |
| Output 1 | 5 V / 1.2 A |
| IC revision | Version control disabled |
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 FET and 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-by power consumption.
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 Compensation700-V Start-Up and Smart Power Management Enables <30-mW Standby Power115-kHz Maximum Switching Frequency Design for High-Power DensityValley Switching and Frequency Dithering to Ease EMI ComplianceThermal Shut DownLow Line and Output Over-Voltage Protection
Typical applications
- Industrial Embedded Energy Monitoring
- Home Security
- Home Automation
- Appliances
- WI-FI Power Strip/Energy Monitor
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(Ω) | fres(MHz) | Mount | VIN | VOut1(V) | IOut1(A) | Vaux(V) | fswitch(kHz) | NPRI : NSEC : NAUX | VT(V (AC)) | Size | L(mm) | W(mm) | H(mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), 1000 µH, 0.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Inductance1000 µH | Rated Current0.5 A | Saturation Current0.55 A | DC Resistance2.08 Ω | Self Resonant Frequency1.8 MHz | MountTHT | – | – | – | – | – | – | – | Size8095 | Length7.8 mm | Width7.8 mm | Height9.5 mm | |||||
 | WE-OLTI Offline Flyback Transformers, 1100 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLTI Offline Flyback Transformers | Inductance1100 µH | – | Saturation Current0.65 A | – | – | MountTHT | Input Voltage 85 - 265 V (AC) | Output Voltage 15 V | Output Current 11.2 A | Auxiliary Voltage17 V | Switching Frequency 115 | Turns Ratio16.5:1:3.5 | Insulation Test Voltage4500 V (AC) | SizeEE16/8/5 | Length20.32 mm | Width24.38 mm | Height16 mm | ||||
 | 750841012 | Transformer, 1660 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | Inductance1660 µH | – | – | – | – | MountTHT | Input Voltage 85 - 265 V (AC) | Output Voltage 15 V | Output Current 11.2 A | Auxiliary Voltage12 V | Switching Frequency 70 | Turns Ratio16.875:1:2.25 | Insulation Test Voltage3000 V (AC) | SizeEE16/7/5 | Length16.9 mm | Width19.5 mm | Height13.31 mm |