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Texas Instruments UCC28881
<125μA Standby High Efficiency Power Supply Reference Design for Neutral-less Wireless Lighting
Overview
| Topology | Other Topology |
| Switching frequency | 52-75 kHz |
Description
Lighting control devices such as wired or wireless switches and dimmers may be used in retrofit environments or in new installations. New installations may have separate line, neutral, and earth wires where the lighting control unit can be powered by connecting it between the line and neutral, whereas in most of the retrofit installations only line and earth wires may be available. In such cases, the lighting control unit has to be powered by connecting it between line and earth terminals while ensuring that the current flowing to earth is limited to 0.5 mA. This necessitates the use of a very low standby consumption, high efficiency power supply.The TIDA-01097 TI Design is a wireless lighting control unit using a low quiescent current offline converter that enables excellent efficiency at low power levels, a low-noise, high-PSRR, low quiescent current, good line and load transient response LDO, and a very low standby and low active current specs wireless microcontroller.
Features
- <125-μA quiescent current including wireless MCU and 69% efficiency @ 35mW load
- Off-line converter with integrated 700-V power MOSFET
- High side current limit circuit with inherent inrush current limiting, output overload and short circuit protections
- Low noise, high PSRR, low quiescent current, good load transient response LDO for wireless control
- Tested and characterized with SimpleLink Bluetooth® Low Energy Wireless MCU having 1-μA standby, low Rx, Tx, core and sensor controller currents enabling easy implementation of lighting controls
- Enables neutral less lighting control applications with earth as return that complies with UL773A
Typical applications
- AC-to-DC Power Supplies / E-Meter, Home Automation SMPS
- Appliances, White Goods and LED Drivers
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | Pins | Type | Mount | Working Voltage(V (AC)) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 10 V(DC), 47 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance47 µF | Capacitance±20% | Rated Voltage10 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.002 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.75 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | Size5075 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | – | – | Inductance470 µH | Rated Current0.35 A | Saturation Current @ 10%0.4 A | DC Resistance2.4 Ω | Self Resonant Frequency3.4 MHz | VersionHeat Shrinking Tube | – | – | MountTHT | – | ||||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length10.16 mm | – | – | – | PackagingBag | – | Rated Current3 A | – | – | – | – | Pins4 | TypeStraight | MountTHT | Working Voltage250 V (AC) |