Summary of Power Integrations Launches LinkSwitch
This article introduces Power Integrations' LinkSwitch-CV integrated circuits, designed to simplify constant-voltage offline power converter designs. These ICs eliminate secondary-side circuitry and optocouplers, reducing cost while boosting reliability. They feature high energy efficiency, exceeding ENERGY STAR 2.0 standards by 10% and consuming under 70 mW at no-load. The devices integrate a 700V MOSFET, control logic, and protection features like thermal shutdown. They are halogen-free, RoHS-compliant, and suitable for appliances like DVDs and set-top boxes.
Parts used in the LinkSwitch-CV project:
- LinkSwitch-CV integrated circuits
- 700V power MOSFET
- On/off control state machine
- Self-biasing circuit
- Frequency jittering mechanism
- Cycle-by-cycle current limit
- Hysteretic thermal shutdown circuitry
MUNICH, Germany (PRWEB) November 10, 2008
LinkSwitch-CV integrated circuits simplify the design of CV converters by eliminating all secondary-side CV and control-loop compensation circuitry, significantly reducing the system cost. System reliability is greatly increased by the elimination of the optocoupler. Moreover, the new devices feature extremely high energy efficiency, beating ENERGY STAR 2.0 specifications for external power supplies by 10% across the entire load range and consuming under 70 mW in no-load mode. The new devices combine a 700V power MOSFET, on/off control state machine, self-biasing circuit, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry.
Comments Silvestro Fimiani, product manager at Power Integrations: “The LinkSwitch-CV dramatically simplifies the design of constant-voltage offline power converters. The high power level achievable with the LinkSwitch-CV is due to continuous conduction mode operation, which optimizes utilization of the integrated transistor. The 700V MOSFET rating allows clampless designs using the LinkSwitch-CV LNK623 and LNK624, further reducing system cost.” Continued Fimiani: “LinkSwitch-CV provides excellent cross-regulation for multiple-output flyback applications, such as DVDs, set-top boxes and auxiliary power supplies used in appliances.”
As well as being extremely energy-efficient, all LinkSwitch-CV family members are produced in halogen-free, RoHS-compliant packaging. LinkSwitch-CV IC packages feature a high creepage distance to the high-voltage drain pin which improves reliability in white goods and industrial applications. LinkSwitch-CV devices are available immediately from $ 0.64 ea in 10,000 unit quantities.
Power Integrations’ Green Room web site (http://www.powerint.com/greenroom) contains information on the issue of energy waste from inefficient power supplies, as well as tips on how to minimize the amount of energy wasted by household and office electronics. The Green Room also provides a comprehensive guide to energy-efficiency standards around the world, as well as a host of reference designs and software to assist in the design of energy-efficient power supplies.
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About Power Integrations
Power Integrations is the leading supplier of high-voltage analog integrated circuits used in energy-efficient power conversion. The company’s breakthrough integrated-circuit technology enables compact, energy-efficient power supplies in a wide range of electronic products, in AC-DC, DC-DC and LED lighting applications. The company’s EcoSmart
- How does the LinkSwitch-CV reduce system cost?
It eliminates all secondary-side CV and control-loop compensation circuitry as well as the optocoupler. - Can the LinkSwitch-CV beat ENERGY STAR 2.0 specifications?
Yes, it beats these specifications by 10% across the entire load range. - What is the no-load power consumption of these devices?
The devices consume under 70 mW in no-load mode. - Does the LinkSwitch-CV support clampless designs?
Yes, the 700V MOSFET rating allows for clampless designs using the LNK623 and LNK624 models. - Are the LinkSwitch-CV devices compliant with environmental standards?
Yes, they are produced in halogen-free, RoHS-compliant packaging. - What applications benefit from the excellent cross-regulation of this device?
Multiple-output flyback applications such as DVDs, set-top boxes, and auxiliary power supplies for appliances. - Where can designers find reference designs for energy-efficient power supplies?
Designers can find them on Power Integrations' Green Room web site.
