Smart load monitor with wake-up feature enables rapid step response with smallest output capacitors for 75-W flyback converters

DALLAS, March 6, 2015 — (PRNewswire) —  Texas Instruments (TI) (NASDAQ: TXN) today introduced the industry's first zero standby power controller chipset with the lowest standby power consumption for AC/DC flyback power supplies up to 75 W.

Taking power supply efficiency to the next level, the new UCC28730 primary-side regulation (PSR) flyback controller with 700-V startup switch and UCC24650 wake-up monitor supports 5- to 24-V output voltages and helps designers create smaller, more efficient power supplies for TVs; home appliances; AC adapters; heating, ventilation and air conditioning (HVAC); and building automation systems. For more information and samples, visit www.ti.com/UCC28730-pr.

A major design limitation with existing primary-side regulation power supplies today is poor transient response performance while trying to maintain low standby power. The UCC28730 and UCC24650 chipset achieves zero standby power consumption while achieving the best transient response performance possible. Besides reducing cost by eliminating feedback components such as an optocoupler and TL431, TI's voltage droop-detection feature in the UCC24650 wake-up controller enables the use of tiny output capacitors while maintaining a narrow-output voltage-regulation window with zero- to full-load transients.

TI will demonstrate the UCC28730 and UCC24650 at booth No. 1001 at the Applied Power Electronics Conference and Expo (APEC) in Charlotte, North Carolina, March 15-19. Follow TI at www.ti.com/APEC15.

Key features and benefits of the UCC28730 and UCC24650:

• Industry's lowest system-standby power consumption: Enables zero standby* power consumption without any additional components in standard flyback designs up to 20 W and is extendable up to 75 W using the intelligent sleep function for adaptive relay control.
• 700-V primary-side regulation controller (UCC28730): Eliminates the need for an optocoupler and associated feedback components, reducing overall system cost while increasing reliability.
• Smart wake-up function: Enables 50 percent lower output capacitors while maintaining a tight output regulation window with zero to full load steps, improving efficiency and saving space.
• Intelligent sleep function: Adapts to converter-loading conditions and is able to disable system functions, adapt for AC relay control, or disable the synchronous rectifier at no load.
• 200-V secondary-side wake-up controller (UCC24650): Compatible with 5- to 24-V output voltage designs without the need for external clamps on Vdd or wake.

This chipset solution is designed to work with TI's ultra-low-power DC/DC converters, sensors, radio frequency (RF) devices (including the SimpleLink^™ CC26xx/CC13xx wireless microcontroller [MCU] platform) and MSP430™ MCUs to keep more system functions alive in standby mode while still maintaining zero standby consumption performance for the entire system. The UCC24650 is also compatible with TI's UCC28633 PSR controller, which enables peak power delivery two times higher than rated name plates without a proportionate increase in magnetics size, making it optimal for applications such a printers, audio, gaming and industrial power supplies.

Tools and support
Speed time to market by entering your design parameters to create a custom design using WEBENCH® Power Designer or by downloading a fully tested TI Designs reference design for a 12-W, 24-V offline power supply (PMP10927) based on the UCC28730 and UCC24650 chipset. Designers can quickly evaluate and test their power-supply designs with the UCC28730EVM-552 10-W, 5-V evaluation module (EVM), or download the TI Designs reference design based on the EVM here.

Availability and pricing
Both products are shipping in volume production and available for ordering through the TI Store and the company's authorized distribution network. The UCC28730 flyback controller comes in a seven-pin small outline integrated circuit (SOIC) package and is priced at US$0.45. The UCC24650 comes in a five-pin small-outline transistor (SOT)-23 package and is priced at US$0.14 in 1,000-unit quantities.

Find out more about TI's power management solutions:

• Learn more about TI's high-voltage switchers.
• Read the blog post, How low can you go without actually pulling the plug?
• Visit the TI E2E™ Community AC/DC and Isolated DC/DC Power forum to search for solutions, get help, share knowledge and solve problems with fellow engineers and TI experts.

*Zero-standby power as defined in International Electrotechnical Commission (IEC) 62301 clause 4.5.

About Texas Instruments
Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog integrated circuits (ICs) and embedded processors. By employing the world's brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today. Learn more at www.ti.com.

Trademarks
WEBENCH is a registered trademark and MSP430, SimpleLink and TI E2E are trademarks of Texas Instruments. All registered and other trademarks belong to their respective owners.

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SOURCE Texas Instruments (TI)

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Texas Instruments (TI) Katie Worthy GOLIN 972-341-2580 Email Contact Heather Weir Texas Instruments 214-479-2143 mailto:m- Email Contact Web: http://www.ti.com