The SLVP089 Synchronous Buck Converter Evaluation Module (SLVP089) provides a method for evaluating the performance of the TL5001 pulse-width- modulation (PWM) controller. The device contains all of the circuitry necessary to control a switch-mode power supply in a voltage-mode configuration. This manual explains how to construct basic power conversion circuits including the design of the control chip functions and the basic loop.
Frequency is set to 100 kHz by R9. See TL5001 data sheet for the curve of oscillator frequency versus timing resistance.
同步整流在高效率场合下适合使用,元件较多,但是换来的高效率不容忽视,输出几安培的电流,MOSFEI都不用散热片,而且都是使用常规的N沟道MOSFET.同步整流随便做至少都可以达到90%以上的效率,做的好的话可以达到96%以上的效率。TL5001其实设计方面可能需要考虑的最大问题就是补偿问题吧,补偿不好容易不稳定。上图使用TPS2812作为MOSFET的驱动,IR公司还有很多类似的驱动如IR2184,IR2104等等都可以使用。
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