ON Semiconductor Inc. has rolled out three current mode, fixed frequency switching regulator additions to its power management product portfolio targeted at high reliability offline AC-DC switched-mode power supplies.
Dubbed, the NCP1129, NCP1126 and NCP 1124, the regulators include a 650 volt MOSFET and skip mode that improves the light load and standby efficiency that meets the Energy Star EPS 2.0 standard. ON Semi claims the three additions will result in a minimal external components as well as significantly reducing the overall bill of materials (BOM). ON says these features make the chips suited for power systems designs such as household appliances, DVD players and set-top boxes (STBs).
The three regulator additions can deliver up to 25 W, 15 W and 12 W and each generate a jittered 65 kHz or 100 kHz switching frequency resulting in what ON Semi says is improvements in electro-magnetic interference (EMI) performance. Additionally, the regulators can be adjusted to maximum peak current via an external resistor, facilitating ramp compensation allowing for continuous conduction mode (CCM) operation can be maintained.
“This new NCP112x series of switchers enable power system design engineers to create more energy efficient and more cost effective power supply designs that will fit into confined spaces,” said Shane Chilton, senior director, AC-DC Power Conversion Products at ON Semiconductor, in a statement. “The design flexibility provided by specifying these devices allows engineers to optimize their design implementations for either heightened power efficiency or reduced board real estate.”
The switching regulators are offered in Pb-free PDIP-7 packages priced at $0.32 per unit in 10,00 unit quantities.
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