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Single-Chip PWM Solution Provides Less Than 30-mW Standby Power for Space-Constrained Apps

Tue, 11/08/2011 - 9:37am
single chip PWM solutionFairchild Semiconductor developed the FAN6756 PWM controller featuring mWSaver technology, which enables the reduction of standby power loss in the external circuit without using additional support ICs. The single-chip green-mode PWM controller is capable of significantly reducing standby losses in SMPS designs, eliminating up to 15 external components, according to the company. Suitable for power supplies that demand extremely low standby power, including adapters for notebooks, printers and game consoles, as well as open-frame SMPS for LCD TVs, LCD monitors and printer power, the FAN6756 incorporates mWSaver technology, including a proprietary Deep Burst Mode technology that reduces switching loss at no-load and light-load conditions. The technology allows the device to reduce power losses not only in the controller itself, but also in the external circuits and components. The FAN6756 also includes an AX-CAP discharge method that minimizes losses in the EMI filter stage by eliminating the X-cap discharge resistors and discharging X-cap energy through the HV pin when the power is unplugged from the AC outlet while still meeting the IEC61010-1 safety requirement.

The device also incorporates robust protection features – including Fairchild’s proprietary Sense Resistor Short-Circuit Protection (SSCP), which shuts down the PWM output to prevent system damage when the sense resistor is shorted - providing for a safe and reliable solution.

The FAN6756, available in an 8-pin SOP package, is part of a comprehensive portfolio of power products designed to improve no-load power consumption as well as to meet stringent energy efficiency standards, reduce component count and simplify design in today’s electronics. Fairchild Semiconductor’s mWSaver technology offers best-in-class minimum no-load and light-load power consumption to meet current and proposed worldwide standards and regulations and enables designers to achieve reduced form factors, improved reliability and lower system costs.

Fairchild Semiconductor
888-522-5372, www.fairchildsemi.com
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