<125μA Standby High Efficiency Power Supply Reference Design for Neutral-less Wireless Lighting

(ACTIVE) TIDA-01097

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Key Document

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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CC2650MODA  SimpleLink™ Bluetooth® low energy Wireless MCU Module  Wireless connectivity  Sample & Buy View Design Kits & Evaluation Modules
LP5912  500-mA low-noise low-IQ low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPD6E004  Low-Capacitance 6-Channel +/-15 kV ESD Protection Array for High-Speed Data Interfaces  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
UCC28881  700-V Lowest Quiescent Current Off-Line Switcher  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CC2650MODA Download -
LP5912 Download Download
TPD6E004 Download Download
UCC28881 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date
PDF 872 08 Dec 2016
Design files (6)
Title Abstract Type Size (KB) Date
ZIP 912 08 Dec 2016
ZIP 4147 08 Dec 2016
ZIP 299 08 Dec 2016
ZIP 125 08 Dec 2016
ZIP 96 08 Dec 2016
ZIP 451 08 Dec 2016

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