High efficiency, low-output ripple power supply reference design for imaging application

(ACTIVE) TIDA-01579

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Key Document

Description

The point-of-load power-tree on video surveillance systems is optimized with this reference design. This reference design has a high performance on key parameters such as output voltage accuracy, voltage ripple, and thermal dissipation. This high performance is possible with a small board area and low BOM cost. This design operates from a 5-V supply commonly found in video doorbells, IP network cameras, and wireless cameras.

Features
  • 1% typical output voltage accuracy
  • High system efficiency to 90% at full load
  • Voltage ripple < 60-μV, useful for noise-critical peripherals
  • Thermal hot spot is < 45°C at full load current
  • Power supply spur free dynamic resolution greater than 80dB
  • Small form factor

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TCA9535  Remote 16-Bit I2C and SMBus, Low-Power I/O Expander With Interrupt Output and Config Registers  I2C  Sample & Buy View Design Kits & Evaluation Modules
TLV62568  1A High Efficiency Step-down Buck Converter in SOT23 and SOT563 Package   Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TLV742P  200mA Small-Size Low-Dropout (LDO) Linear Voltage Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS22976  5.5V, 6A, 14mΩ, Dual Load Switch with Adj. Rise Time & Optional QOD  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS61169  TPS61169 38-V High-Current Boost WLED Driver   LED drivers  Sample & Buy View Design Kits & Evaluation Modules
TPS62821  1A Step-Down Converter With 1% Accuracy in 1.5x2mm QFN  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TCA9535 Download
Download Download
Download
Download -
TLV62568 Download
Download
TLV742P Download -
TPS22976 Download -
TPS61169 Download Download
TPS62821 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 Views TI Recommends
PDF 10732 12 Oct 2018 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 363 12 Oct 2018 0
ZIP 1091 12 Oct 2018 0
PDF 1059 12 Oct 2018 0
PDF 394 12 Oct 2018 0
PDF 81 12 Oct 2018 0
PDF 416 12 Oct 2018 0

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