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difference between TPS40060 and TPS40061

Winnie Chan94
Intellectual 300 points
Other Parts Discussed in Thread: TPS40061, TPS40060

Hi,

i have some questions about the different between TPS40060 and TPS40061,

1. what is two quardrant operation and one quardrant operation?

2. what does output current sink and source mean, and what is it for?

3. why TPS40061 inculdes most application?

Thanks a lot!

  • 0
    TI__Guru**** 191445 points
    TPS40061 is fully synchronous converter. At light loads, the switch current can go negative and the converter can sink current (two quadrant operation or forced CCM operation). TPS40061 disables the low side FET in that condition, so it acts like a non synchronous converter at light loads (one quadrant operation also maybe known as diode emulation or forced DCM operation). Sometimes you may not want to operate in DCM mode and in some applications such as current sharing, you may want to want to prevent sinking current. Some applications require current sinking and it may also be better for transient response. It is really a designer preference and we provide for both options. Most applications will just need an ordinary synchronous buck, TPS40061.