參數(shù)資料
型號(hào): PM6680A
廠(chǎng)商: STMICROELECTRONICS
元件分類(lèi): 穩(wěn)壓器
英文描述: 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
封裝: 5 X 5 MM, LEAD FREE, VFQFPN-32
文件頁(yè)數(shù): 36/48頁(yè)
文件大?。?/td> 1932K
代理商: PM6680A
PM6680A
Design guidelines
41/48
Equation 37
We choose standard value L=4.7
H.
I
L(max) = 0.886 A @VIN =24 V.
ILRMS = 2.523 A
Ipeak = 2.5 A + 0.58 A = 3.83 A
2.
Output capacitor selection
We would like to have an output ripple smaller than 25 mV.
OUT1: POSCAP 4TPE150MI
OUT2: POSCAP 6TPE220M
3.
Power MOSFETs
OUT1:High side: STS5NF60L
Low side: STS7NF60L
OUT2:High side: STS5NF60L
Low side: STS7NF60L
4.
Current limit
OUT1:
Equation 38
Equation 39
(Let's assume the maximum temperature Tmax = 75 °C in RDSon calculation). We
choose standard value RCSENSE = 560 .
OUT2:
Equation 40
A
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