TI Adds 3-A Converter for Digital TV and Industrial POLs
Texas Instruments Inc. (TI) has added a high efficiency, 500-kHz, step-down dc-dc integrated circuit (IC) with integrated FET that delivers 3-A of continuous output current and supports input voltages of 5.5 V to 36 V. The small, simple-to-design switcher is intended for use in point-of-load systems, such as industrial applications, digital television, DVD, battery charging and 12-V/24-V distributed power systems.
TI's non-synchronous TPS5430 SWIFT™ converter provides greater than 90 percent power efficiency and two percent output voltage accuracy (down to 1.23 V). Delivering 3-A of continuous current (4-A peak) at full temperature and operating over a junction temperature range from -40°C to +125°C, the device excels in hot environments where good thermal performance is needed, such as an LCD digital TV display that operates without the use of a cooling fan.
The TPS5430 is suited for powering low-voltage digital signal processors (DSPs), FPGAs and general-purpose processors. Additionally, for applications that require higher output voltage levels, such as high power LED or automotive systems, the TPS5430 can step-down voltages as high as 30-V.
To reduce the size of external components, the device's switching frequency is preset to 500 kHz. In addition, all compensation components are integrated into the TPS5430 monolithic device, which minimizes the total number of required external parts to seven components in a typical application.
In addition to the TPS5430, TI also announced the TPS54317 synchronous, step-down dc-dc converter with a high switching frequency, which can be synchronized up to 1.6 MHz. The new switcher also provides 3-A of continuous current (4-A peak), while supporting an input voltage of 3V to 6 V. The TPS54317, which comes in a 4 mm x 5 mm QFN package, reduces the size of external capacitors and inductors, while stepping down voltage as low as 0.9 V.
The TPS5430 and TPS54317 SWIFT converters are available in volume production from TI and its authorized distributors. The TPS5430 comes in a thermally enhanced 8-pin HSOIC package, and is priced at $1.85 each in quantities of 1,000 units. The TPS54317 is available in a 4 mm x 5 mm, 24-pin QFN package, and is priced at $2.50 each in quantities of 1,000.
