Wide Input 2W Bias Power Supply PMP7668 (ACTIVE)

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Key Document


This reference design is a 2W bias power supply for applications requiring operation over a wide input range (110 - 500VAC). The small form factor (69mm x 26mm) and high efficiency of this design make it ideal for e-metering applications. Information provided in this design will reduce time to market by providing important test data such as efficiency, output ripple, startup, and switching stress. Additionally, TI has conducted emissions testing on this design to ensure that it exceeds the EN55022 Class B limits.

  • Supports a wide input voltage range: 110VAC - 500VAC
  • Targeted for small form factor applications (69mm x 26mm)
  • Greater than 65% efficiency over tested operating range
  • Achieved voltage regulation of +/-1% at full load
  • Test results demonstrate this design's capability to pass EN55022 Class B EMC standard

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC28722  Low-Cost CVCC Flyback Controller With Primary-Side Regulation for Bipolar Power Device  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)
TLV704 Download Download
UCC28722 Download

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Technical Documents

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Application notes (1)
Title Type Size (KB) Date
PDF 4085 02 Nov 2017
User guides (1)
Title Type Size (KB) Date
PDF 1370 10 Mar 2014
Design files (3)
Title Type Size (KB) Date
ZIP 168 10 Mar 2014
PDF 79 10 Mar 2014
PDF 24 10 Mar 2014
Related Tools & Software

Software (1)

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