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Monday 6 September 2010
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Power Supplies
CamSemi has primary-side sense controller for 16W
Wednesday 28 July 2010
CamSemi has added to its family of primary side sensing (PSS) controllers with a higher power device aimed at universal input adapters and chargers above 8W.
Typically aimed at 16W networking products, the controller also has a suitable power rating for power tool chargers.
For example, a 12W adapter based on C2163 delivers an average efficiency greater than 80% and a no-load power consumption of less than 100mW against the current Energy Star 2.0 requirement of 300mW.
CamSemi’s PSS controllers have been typically used in lower power mobile phone chargers.
Last year, the Cambridge-based company claimed five star (sub-30mW) stand-by power from phone chargers made using its C2162 controller chip.
“The techniques we developed to cut no-load power consumption to less than 30mW for 5 star-rated chargers have been utilised but at higher powers,” said David Baillie, CEO of CamSemi.
As a result the higher power device offers current and voltage regulation to ±5% without board level trimming, programmable cable compensation up to 10%, switching frequency adjustment, and quasi-resonant switching to improve efficiency and reduce EMI.
Like all of CamSemi’s designs to date, the controller uses cheap external high-voltage bipolar transistors - the underlying chip technology is 3V CMOS - to keep the package small.
The part is packaged in SOT23-6.
www.camsemi.com/support/datasheets
Typically aimed at 16W networking products, the controller also has a suitable power rating for power tool chargers.
For example, a 12W adapter based on C2163 delivers an average efficiency greater than 80% and a no-load power consumption of less than 100mW against the current Energy Star 2.0 requirement of 300mW.
CamSemi’s PSS controllers have been typically used in lower power mobile phone chargers.
Last year, the Cambridge-based company claimed five star (sub-30mW) stand-by power from phone chargers made using its C2162 controller chip.
“The techniques we developed to cut no-load power consumption to less than 30mW for 5 star-rated chargers have been utilised but at higher powers,” said David Baillie, CEO of CamSemi.
As a result the higher power device offers current and voltage regulation to ±5% without board level trimming, programmable cable compensation up to 10%, switching frequency adjustment, and quasi-resonant switching to improve efficiency and reduce EMI.
Like all of CamSemi’s designs to date, the controller uses cheap external high-voltage bipolar transistors - the underlying chip technology is 3V CMOS - to keep the package small.
The part is packaged in SOT23-6.
www.camsemi.com/support/datasheets
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