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Power conversion IC integrates peak mode operation

Posted: 30 Mar 2006     Print Version  Bookmark and Share

Keywords:PeakSwitch  power-conversion IC  peak-mode operation  Power Integrations 

Power Integrations introduced PeakSwitch, a family of ICs for power supplies with peak-to-continuous power ratios of up to 3:1. Power Integrations claims that PeakSwitch is the industry's first monolithic power-conversion IC with peak-mode operation. The product targets applications such as printers, personal video recorders, audio amplifiers, broadband modems and DC motor drives.

PeakSwitch features a 700V MOSFET and low-voltage control circuitry integrated on a monolithic IC. The device employs ON/OFF control, providing low standby power consumption as well as constant active-mode efficiency. This enables compliance with all current energy-efficiency standards, including the proposed ENERGY STAR efficiency standard for printers, which specifies power budgets during standby, sleep and active operation. Other key features include integrated auto-restart, hysteretic thermal shutdown and integrated frequency jittering to minimize EMI.

"Until now, power supplies had to be over-engineered to accommodate high levels of peak power use," said Balu Balakrishnan, president and CEO of Power Integrations. "With PeakSwitch, designs only need to accommodate a power supply's continuous power requirements. As a result, designers can use smaller transformers and other components."

PeakSwitch is available in lead-free, plastic through-hole DIP-8 and higher power standard TO-220 packages. Pricing in 1,000-piece quantities for the PKS604PN, a 16W continuous, 44W peak part in a DIP-8 package is Rs.40.27 (91 cents). The PKS606YN, a 45W continuous, 86W peak part in a TO-220 package is priced at Rs.73.01 ($1.65) each. Small quantities of most types are available from factory stock, with production quantities available six weeks ARO. All part types are available, with the exception of the PKS603PN, which will be available in Q2.

Design support includes a data sheet, an application note (AN 41), a reference design kit (DAK 93) containing an operational 32W continuous, 85W peak, universal input AC-DC power supply and product samples, and the company's power supply design software programme, PI Expert.

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