green-techZONE Products for the week of October 20, 2003
Lean, Green Power Machines -- Fairchild Semiconductor's
"Green" Single-Chip BDCMOS Power Switches Meet The 1-W Initiative
Standard
"Green" Power Chips Enable Supplies That Boast High
Efficiency, Lower Standby Power Consumption, and Reduced Switch Mode Power
Supply Component Count
Fairchild Semiconductor introduced three new Fairchild Power Switch
(FPS) products featuring burst mode operation for stand-by mode (under 0.1W
@ 265Vac) that meets the International Energy Agency's (IEA) "1-Watt
Initiative" aimed at reducing stand-by power losses to below 1 Watt.
The FSD200, FSD210, and FSDM311 significantly reduce bill of material costs
while achieving high-efficiency and obtaining regulatory compliance. The
unique integration of each of these FPS products minimizes external components,
simplifies designs, and lowers costs in target applications, such as battery
chargers and adapters, mobile phones, PDAs, MP3s, C-TVs, monitors and PC
auxiliary power. These highly integrated off-line power switches combine
a fully avalanche-rated SenseFET (LDMOS) for current sensing (650V or 700V
minimum breakdown ratings) with a voltage mode PWM IC, and they are equipped
with a built-in start-up switch, eliminating the need for an external start-up
resistor. The FSD200 also eliminates the transformer auxiliary winding.
"With their 1-Watt stand-by power, Fairchild's new FPS devices are efficient and environmentally friendly," said Fairchild's product marketing manager for the Fairchild Power Switch, SangTae Im. "In addition, these integrated products provide performance superior to MOSFET/controller or RCC switching converter solutions, while offering the benefits of reduced board space and improved reliability through various protection circuits."
The Fairchild Power Switch products are self-biased and protected, linear control current-to-duty cycle converters with open drain output. They operate from 6.7V to 21V at a frequency of 134kHz with frequency modulation for low EMI. Additional features include internal soft start to reduce the overshoot current at plug in, overload protection, over current protection and internal thermal shutdown protection.
Both the FSD200 and FSD210 are available in 7-DIP packages while the
FDSM311 is available in an 8-DIP package. Beginning 2004, these products
will be available in lead-free packaging that meets or exceeds the requirements
of the joint IPC/JEDEC standard J-STD-020B and is compliant with the European
Union requirements, which will take effect in 2005.
analogZONE Says...
It's good to see Fairchild helping demonstrate that it's possible to produce designs that can add green to the planet as well as your company's bottom line. With standby power accounting for between 5% and 8% of the average household power bill, eliminating these unnecessary loads from our designs are some of the easiest ways to make products more environmentally friendly. The good news is that Fairchild has made it both easy and cost-effective to incorporate power-efficient power supplies into your next design. The integrated sense, startup, and bias circuitry save you the cost and space of the discrete components often used to implement these functions.
And with standby power draw at under 0.1 W, it will be easy to meet the voluntary 1 W standby requirement that will soon be a part of the EnergyStar consumer certification program. Fairchild's solution will be even more helpful if you're thinking about exporting your design, since several Asian nations are on the verge of requiring nearly all electronic goods to have standby power of 1 W or less. While I don't have any specific information at the moment, I'd also expect Europe to be implementing similar power consumption regulations soon.
These parts are in production with the FSD200 priced at $0.31, the FSD210 at $0.34 and the FSD311 at $0.43, all for 1000-piece lots.
Datasheets:
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