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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
- WI-FI Power Strip/Energy Monitor
- Appliances
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 768772102 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage) | 1000 | 0.5 | 0.55 | 2.08 | 1.8 | THT | – | – | – | – | – | – | – | 8095 | 7.8 | 7.8 | 9.5 | ||
 | 750313739 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-OLTI Offline Flyback Transformers | 1100 | – | 0.65 | – | – | THT | 85 - 265 V (AC) | 5 | 1.2 | 17 | 115 | 16.5:1:3.5 | 4500 | EE16/8/5 | 20.32 | 24.38 | 16 | ||
 | 750841012 | SPEC | 5 files | Active i| Production is active. Expected lifetime: >10 years. | Transformer | 1660 | – | – | – | – | THT | 85 - 265 V (AC) | 5 | 1.2 | 12 | 70 | 16.875:1:2.25 | 3000 | EE16/7/5 | 16.9 | 19.5 | 13.31 |
| Samples |
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| 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 |
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