Product category:
Power Supply ICs and Controllers
News Release from: Power Integrations | Subject: TinySwitch-III
Edited by the Electronicstalk Editorial
Team on 13 February 2006
Controller and MOSFET come together
efficiently
The TinySwitch-III marks the third generation of the popular family of ICs for energy-efficient power supplies.
Power Integrations has introduced TinySwitch-III, the third generation of the company's popular family of ICs for energy-efficient power supplies TinySwitch-III is the industry's most energy-efficient, highly integrated, cost-effective IC for universal-input power supplies ranging from 3 to 28W
This article was originally published on Electronicstalk on 5 Apr 2005 at 8.00am (UK)
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TinySwitch-III is well suited for use in a wide array of power supply applications, including DVD players, white goods, industrial controls, chargers for portable electronics and standby power for PCs, servers and LCD TVs.
With its high level of integration and robust feature set, TinySwitch-III enables simple, flexible designs with far fewer components than competing discrete and integrated solutions.
TinySwitch-III features a 700V MOSFET alongside low-voltage control circuitry on a monolithic IC.
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Other features include integrated auto-restart, input undervoltage and output overvoltage protection, hysteretic thermal shutdown and frequency jittering to minimise EMI.
TinySwitch-III offers unmatched design flexibility through the use of selectable current limits, allowing the designer to choose any of three current limit values for each family member without any additional IC pins or external components.
A key enhancement from previous generations of the TinySwitch line, this feature allows designers to optimise their power supplies for either maximum efficiency or greatest power output.
Also, adjacent family members have matching available current limits, permitting the substitution of one TinySwitch-III family member for another without redesigning the transformer.
TinySwitch-III employs an on/off control scheme, which delivers virtually constant efficiency regardless of load.
By contrast, PWM and self-oscillating designs exhibit diminishing efficiency as load decreases.
Constant efficiency is a key advantage with respect to recent efficiency standards for external power supplies, which specify an average efficiency across a range of load levels.
TinySwitch-III also enables easy compliance with the most stringent standards for standby and no-load energy use, consuming less than 150mW of no-load power without the use of a bias winding on the transformer.
Introduced in 1998, the original TinySwitch was the first high-voltage power conversion IC to use on/off control to regulate the output of a power supply.
This breakthrough was the basis of Power Integrations' patented EcoSmart energy-efficiency technology, which dramatically reduces the amount of electricity consumed by power supplies in both active and standby modes of operation.
Power Integrations has sold more than 800 million TinySwitch units since 1998, and more than one billion ICs incorporating EcoSmart technology.
"The original TinySwitch touched off a revolution in the power supply industry for low-power applications", said Balu Balakrishnan, President and CEO of Power Integrations.
"The innovative on/off control scheme enabled huge gains in energy efficiency, while the high level of integration dramatically simplified the design of switching power supplies".
"The enhancements included with TinySwitch-III provide the next step in cost-effectively allowing engineers to simplify their designs in a variety of high-volume markets such as cellphone chargers, white goods, DVD players and PCs", continued Balakrishnan.
TinySwitch-III is available in lead-free, plastic through-hole DIP-8 and surface-mountable SMD-8 packages.
Pricing in 1000-piece quantities for the TNY274PN, a 6W part in a DIP-8 package, is $0.79 each.
The TNY280PN, a 28W part, is priced at $1.45 each.
Small quantities of each type are available from factory stock, with production quantities available 6 weeks ARO.
Complete documentation for the TinySwitch-III family can be found on the Power Integrations website.
The new product family is also supported by a reference design kit, the DAK-91, which includes a fully tested 12V, 1A power supply, an engineering test report and product samples. Request a free brochure from Power Integrations ...
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