The LinkSwitch-HP family of off-line switcher ICs delivers from 9- to 90-W output power with primary-side regulation (PSR). It uses control algorithms and the properties of the main power transformer and output diode instead of optocouplers and related feedback circuitry to determine the amount of power to deliver from the primary to the isolated secondary side. The method reduces component count, saving space and cost while enhancing reliability.
The switcher IC devices suit tablet chargers, ultra-book adapters, LCD monitors and TVs, STBs, appliances and embedded power supplies. It automatically selects a control mode according to prevailing line and load conditions to optimize conversion efficiency and response to transient load demands. The device provides a no-load power consumption 50% efficiency at 0.1–W input power, meeting all global energy efficiency regulations. It is offered in eSIP-7C and eDIP-12B packages. (From $0.42 ea/10,000 — available now.)
By Paul O’Shea
Power Integrations , San Jose , CA
Sales 408-414-9200
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