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Washing Machine: Low-End

Washing Machine: Low-End Solutions from Texas Instruments

Block Diagram


General-Purpose Logic Power Management Relay/LED Driver Sensor & Monitor Standard Linear

Design Considerations

In contrast to state-of-the-art "high-end" appliances, low-end appliances prioritize function over features to achieve rigorous cost objectives. TI provides traditional 5 V analog and logic commodity devices to meet this demand, as well as devices integrating relay drivers, zero-volt detection, brown-out detect, and 5 V linear regulation, which allow for keeping BoM (bill of materials) costs within budget.

5 V Logic and Analog: Texas Instruments provides the largest portfolio in the commodity space that gives designers the flexibility to choose from any logic function needed. Whether it’s an AND gate or a single-bit buffer that is needed on the board, TI has it. Likewise, TI offers a wide selection of standard linear devices for regulation (linear regulators), relays (relay drivers), signal conditioning (operational amplifiers), etc that are available in industrial temperature range.

Integration: Texas Instruments provides fully-integrated solutions such as the digital signal controllers (for digital motor control, PFC, and other system functions), and relay drivers that provide up to 8 channels, zero-volt detection, and 5 V linear regulation. Aside from the commonly-used 7 bit relay drivers (such as the ULN2003A Darlington arrays) TI also provides the 8 bit TPL9201 or TPL9202 to drive relays for water and drain valves, and triacs that may be used to turn the electric motor ON/OFF. These devices also have integrated features that allow for the detection of the zero-volt crossing of the secondary side of the power transformer. Information is fed back to the microcontroller that lets it know when to switch ON/OFF the relays for better long-term reliability of the relays themselves. A brown-out detect feature that provides an early notification in case of a decrease in power supply voltage is available on the TPL9202. These devices also carry an on-chip 5 V linear regulator to power 5 V logic or microcontrollers that may reside on the board.

Application Notes

  • Flash Programming Solutions for the TMS320F28xxx DSCs (spraal3.htm, 8 KB)
    19 Aug 2008 Abstract
    

Selection and Solution Guides

Selection Guides

  • Amplifier and Data Converter Selection Guide (Rev. B) (slyb115b.pdf, 3.87 MB)
    01 Jun 2007 Download
  • Logic Selection Guide 2007 (Rev. Z) (sdyu001z.pdf, 2.79 MB)
    24 Apr 2007 Download
  • Interface Selection Guide (Rev. C) (sszt009c.pdf, 1.24 MB)
    13 Sep 2006 Download

Solution Guides

  • Industrial Solutions Guide (Rev. C) (slab039c.pdf, 2.35 MB)
    15 Jan 2006 Download

Product Bulletin & White Papers

White Papers

  • Combining Inrush Current Limiting with PFC for White Goods Motor Applications (sluy001.pdf, 379 KB)
    21 Jan 2008 Download

News Releases & Authored Articles

News Releases

Date Headline
19 Feb 2008 New TI TMS320C2000™ DSCs provide fixed point affordability and floating point ease-of-use to enable energy-efficient industrial applications

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