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Texas Instruments UCC28881 | Demoboard UCC28881EVM-680
Offline High-Side Buck Converter Evaluation Module (EVM)
Overview
| Topology | Buck Converter |
| Input voltage | 85-265 V |
| Output 1 | 5 V / 0.2 A |
| Output 2 | 13 V / 0.22 A |
| IC revision | A |
Description
The EVM uses the UCC28881 low quiescent current switcher device. This device integrates a 700-V FETand controller into one SOIC7 package. The device also features a high-voltage current source, enablingstart-up and operation directly from the rectified mains voltage. The low quiescent current of the deviceenables very high efficiency in non-isolated high-side buck low-power converter.The PWM signal generation is based on a maximum constant ON time concept and each ON pulse isfollowed by a minimum OFF time to ensure the power MOSFET is not continuously driven in the ON state.The PWM signal is AND gated with the signal from a current limiter. The AND gated signal controls thepower MOSFET through a driver. Thereby no internal clock is required, and the switching of the powerMOSFET is load dependent. The device is also protected from failure conditions with thermal shutdown,under-voltage lockout, soft start and overload protection. Please refer to the UCC28881, (SLUSC05), datasheet for details.
Features
The UCC28881EVM-680 features include:
- Single13-V Output
- No Load to 225-mA Load Range
- Universal Off-Line Input Voltage Range
- Overload and Output Short-Circuit Protection
- Controlled Start Up and Restart After Fault Protection
Typical applications
- Infrastructure
- LED Lighting
- E Metering
- White Goods
- Home Appliances
- Home Automation
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Mount | Pins | Type | L(mm) | H(mm) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TIS Radial Leaded Wire Wound Inductor, 1000 µH, 0.46 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TIS Radial Leaded Wire Wound Inductor | Inductance1000 µH | Rated Current0.46 A | Saturation Current0.68 A | DC Resistance2500 mΩ | Self Resonant Frequency1.1 MHz | MountTHT | – | – | Length11 mm | Height11.5 mm | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Pin Header - Single, –, 3 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | Rated Current3 A | – | – | – | MountTHT | Pins3 | TypeStraight | Length7.62 mm | – | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C |