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PWM controller touts less than 10mW standby power

Posted: 02 Apr 2013 ?? ?Print Version ?Bookmark and Share

Keywords:PWM controller? Energy Star 5? voltage regulation?

Texas Instruments Inc. has unleashed what it boasts as the industry's first flyback controller that exceeds Energy Star 5 standby power requirements for 10-65W AC/DC adapters used in notebooks, motor control, smart meters, micro-inverters and other high-powered applications. Used with TI's WEBENCH online design tool, the LM5023 flyback controller eases and speeds high-voltage DC/DC designs, added the company.

The isolated quasi-resonant pulse-width modulation (PWM) controller with integrated 700mA driver claims to offer high efficiency at up to 90 per cent, low EMI and less than 10mW of standby power, TI indicated. The LM5023 provides one per cent accurate output voltage regulation, eliminating the need for cable compensation. When coupled with the highly accurate LMV431 shunt reference, it provides a competitively priced, one per cent accurate flyback controller system, the firm noted.

The LM5023 operates at low-power skip mode for ultra-low stand-by power, or less than 10mW at 230VAC. This minimises energy-wasting vampire effect of AC/DC power supplies. In addition, it features a 700mA gate driver that drives large FETs for higher power outputs without additional components.

Adapter power products from TI, including the LM5023, UCC28710, UCC28710 and UCC24610 primary and secondary PWM controllers, provide reliable, efficient, low-cost power solutions for a range of AC/DC charger and adapter applications, said the company. Innovative, high-efficiency power management controllers reduce both energy consumption and solution size. Universal charge controllers help designers minimise environmental impact and reduce charging times with standards compliance.

Samples can be requested and production quantities of the LM5023 are expected to be available in Q2. Offered in an 8-pin MSOP package, the LM5023 is priced at $0.38 in quantities of 1,000.





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