嚴(yán)酷的汽車環(huán)境要求高性能電源轉(zhuǎn)換
快速瞬態(tài)響應(yīng)
本文引用地址:http://butianyuan.cn/article/111951.htmLTC3890 利用以快速 25MHz 帶寬工作的放大器實(shí)現(xiàn)電壓反饋。高帶寬放大器結(jié)合高開關(guān)頻率和低值電感器,允許非常高增益的交叉頻率。這允許補(bǔ)償網(wǎng)絡(luò)為實(shí)現(xiàn)非常快的負(fù)載瞬態(tài)響應(yīng)而優(yōu)化。圖 3 說(shuō)明了在 3.3V 輸出上 4A 階躍負(fù)載的瞬態(tài)響應(yīng),與標(biāo)稱值有不到 100mV 的偏離。
參考文獻(xiàn):
[1] LTC3890 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller[R/OL]. http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1042,C1032,C1062,P90758
[2]Haug B. High-voltage capacitor charging made simple[R/OL].http://cds.linear.com/docs/Article/EET_US_052009.pdf
[3]Haug B.Low-power flyback converter eliminates optocoupler[R/OL]. http://powermanagement-europe.com/en/low-power-flyback-converter-eliminates-optocoupler.html?cmp_id=71&news_id=222900834
[4]Haug B.Cutting the coupler[R/OL].New Electronic(2007-8-4).http://fplreflib.findlay.co.uk/articles/10675/Cutting%20the%20Coupler.pdf
[5]LTC1604 - High Speed, 16-Bit, 333ksps Sampling A/D Converter with Shutdown[R/OL]. http://www.linear.com.cn/pc/productDetail.jsp?navId=H0,C1,C1001,P1629
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