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标题: SP6690 与 TPS61041 可以互换 [打印本页]

作者: jameswangsynnex 时间: 2010-2-22 15:53 标题: SP6690 与 TPS61041 可以互换

SP6690 白光LED驱动

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Operated Down to 1V
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High Efficiency: Greater Than 75%
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Low Quiescent Current: 20μA
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Ultra Low Shutdown Current: 10nA
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Single Battery Cell Operation
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Programmable Output Voltage
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1Ω switch (250mV at 250mA)
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Miniature Package: 8 Pin DFN, 5 Pin TSOT or 5 Pin SOT-23

The TPS61040/41 is a high-frequency boost converter dedicated for small to medium LCD bias supply and white LED backlight supplies. The device is ideal to generate output voltages up to 28 V from a dual cell NiMH/NiCd or a single cell Li-Ion battery. The part can also be used to generate standard 3.3-V/5-V to 12-V power conversions.
The TPS61040/41 operates with a switching frequency up to 1 MHz. This allows the use of small external components using ceramic as well as tantalum output capacitors. Together with the thin SON package, the TPS61040/41 gives a very small overall solution size. The TPS61040 has an internal 400 mA switch current limit, while the TPS61041 has a 250-mA switch current limit, offering lower output voltage ripple and allows the use of a smaller form factor inductor for lower power applications. The low quiescent current (typically 28 µA) together with an optimized control scheme, allows device operation at very high efficiencies over the entire load current range.

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