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Texas Instruments UCC28911DR | Demoboard PMP11774
700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Regulation
Overview
| Topology | Flyback Converter |
| Input voltage | 100-360 V |
| Switching frequency | 105-125 kHz |
| Output 1 | 5 V / 0.35 A |
| Output 2 | 18 V / 0.35 A |
| IC revision | 1 |
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
- Home and Building Automation
- Aux power for TV, Server, White Goods
- Thermostat
- Bias Power for Smoke Alarm, Fire Alarm and
- Wall Adapters, Chargers for Mobile Phones
- Smart plug, IoT, MCU and WiFi Power
- Power Metering Bias
- LED Lighting
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | VIN | VOut1 (V) | IOut1 (mA) | VOut2 (V) | IOut2 (mA) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (mA) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | IR (A) | RDC max. (Ω) | fres (MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750315942 | SPEC | 4 files | Active i| Production is active. Expected lifetime: >10 years. | MID-OLTI Offline Flyback Transformers for Texas Instruments | 71 - 254 V (AC) | 18 | 350 | 5 | 350 | 85 | 1 | 23.33:2.33:1 | 450 | 625 | 17.96 | 20.3 | 14.3 | THT | EE16/8/5 | – | – | – | – | ||
 | 744743102 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | 1 | – | 550 | – | 8 | 8 | 12.5 | THT | – | 0.42 | 2.5 | 1.6 | Standard |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | VIN | VOut1 (V) | IOut1 (mA) | VOut2 (V) | IOut2 (mA) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (mA) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | IR (A) | RDC max. (Ω) | fres (MHz) | Version | Samples |
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