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GPS: Personal Navigation Device

GPS: Personal Navigation Device Solutions from Texas Instruments.

Block Diagram


-Digital to Analog Converter AC Adapter Analog to Digital Converter Audio Amplifiers Audio Codec - TLV320AIC3254 Application Backlight Battery Charger Bluetooth Receiver Clock Core and I/O Power Echo Cancellation Fuel Gauge GPS Receiver Interface Level Shift Level Shift Lithium Ion Battery Protection Logic Low Noise Power Over Voltage Protection PCM Codec PLL Clock Processor Ref Sensor Signal Conditioning System Power Temperature Sensors Touch Screen Controller WiFi

Design Considerations

Global Positioning System (GPS)technology has matured into a resource that goes far beyond its original design goals of navigation, and asset tracking. GPS Portable Navigation Devices (PND) provide accurate location and integrate many consumer features, as people use GPS to be more productive, and make their automotive commute safer, and easier.

GPS Module and Processor: Accurate location is the main goal of GPS; achieving portability requires smaller size, lower cost, lower power consumption, and higher performance discrete GPS solutions. OMAP is a power-efficient, TI-enhanced ARM-based architecture application processor that combines high performance productivity applications with mobile entertainment applications. The NaviLink 5.0 GPS is the smallest GPS solution (board area 25 mm2), the lowest total bill-of-materials, and lowest power consumption. PNDs use other sensors such as altimeter, humidity, temperature and accelerometers to calculate position. Sensor signal conditioning with the PGA30x and ADS78xx family is enable increased accuracy.

Power Management: Special DC/DC buck converters like TPS624xx/TPS65xxx families with advanced dynamic voltage scaling meet the needs of the newest processors. TI’s TPS630xx family offers 96% efficiency over a wide battery voltage range, with input voltage down to 1.8 volts extending battery life and providing support for Li-ion battery technology. For additional low noise power rails the TPS799xx/TPS717xx LDOs are available. Requirements for wall-plug and USB-port charging can be addressed with the bq240xx family. Innovative next-generation gas gauge solutions are offered in the bq275xx using "Impedance Track" to automatically learn/detect battery characteristics.

Audio Considerations: Integrating entertainment applications like music players demands improved audio features such as multi-band equalizers and echo/noise cancellation while maintaining low power consumption. Newer generation TI audio codecs, such as the TLV320AIC3254, process sound with better audio quality and longer battery life. Class-D amplifiers continue to increase in popularity because of their efficiency and their small-footprint packages.

Display/Lighting and Touch Screen Considerations: TI offers touch-screen controller solutions like TSC21xx/TSC23xx with integrated ESD protection. The TSC200x TSCs achieves low power consumption and are immune to vibration and display noise; small-footprint packages are available. LED drivers like TPS61xxx/75xxx offer flexibility and enable pulse-width modulation and digital dimming with up to 32 steps for brightness control in a small, 2x2 mm2 package. TI provides OLED-specific drivers like TPS6114x/6512x. Voltage levels compatibility problems are solved with level shifters such as SN74AVC20Txxx.

Clocks: The CDCE9xx clock families are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers, generating up to 9 output clocks from a single input frequency.

Application Notes

  • Transition From Prior bqJunior Gauges to the bq27x10 (slua429.htm, 8 KB)
    17 Jul 2007 Abstract
  • Dynamic Power-Path Mgmt & Dynamic Power Mgmt (slua400.htm, 8 KB)
    02 Jan 2007 Abstract
  • Minimizing Ringing at the Switch Node of a Boost Converter (slva255.htm, 8 KB)
    15 Sep 2006 Abstract
  • Measuring Class-D Amplifiers for Audio Speaker Overstress Testing (sloa116.htm, 8 KB)
    28 Oct 2005 Abstract
  • Selecting the Right Level Translation Solution (Rev. A) (scea035a.htm, 8 KB)
    22 Jun 2004 Abstract
  • Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
    24 May 2004 Abstract
  • Understanding the Terms and Definitions of LDO Voltage Regulators (slva079.htm, 8 KB)
    21 Oct 1999 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
  • Clocks and Timing Selection Guide (Rev. A) (slyb104a.pdf, 776 KB)
    23 Apr 2007 Download
  • Portable Power Management Sine On (Rev. A) (slym061a.pdf, 3.05 MB)
    13 Sep 2006 Download
  • Interface Selection Guide (Rev. C) (sszt009c.pdf, 1.24 MB)
    13 Sep 2006 Download

Solution Guides

  • System Monitoring and Protection Quick Reference Guide (slyb132.pdf, 1.5 MB)
    06 Aug 2007 Download

News Releases & Authored Articles

News Releases

Date Headline
27 Oct 2008 TI introduces the lowest power 1.8-V audio codec with integrated miniDSP in production today
07 Jul 2008 TI boosts portable audio performance with industry's first stereo Class-D amplifier featuring dynamic range compression and speaker protection
12 Jun 2008 TI brightens notebook LCD displays with new white LED driver
11 Oct 2007 TI Introduces Dual-Voltage Level 200-mA LDO for Handheld Devices
08 Jun 2007 TI Introduces 1.2-A High-Brightness Flashlight LED Driver with I2C-Compatible Interface

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