TL5001同步降壓應(yīng)用,高效率,TL5001 Synchronous Buck Converter
關(guān)鍵字:TL5001,同步降壓電路圖
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.
同步整流在高效率場(chǎng)合下適合使用,元件較多,但是換來(lái)的高效率不容忽視,輸出幾安培的電流,MOSFEI都不用散熱片,而且都是使用常規(guī)的N溝道MOSFET.同步整流隨便做至少都可以達(dá)到90%以上的效率,做的好的話可以達(dá)到96%以上的效率。TL5001其實(shí)設(shè)計(jì)方面可能需要考慮的最大問(wèn)題就是補(bǔ)償問(wèn)題吧,補(bǔ)償不好容易不穩(wěn)定。上圖使用TPS2812作為MOSFET的驅(qū)動(dòng),IR公司還有很多類似的驅(qū)動(dòng)如IR2184,IR2104等等都可以使用。