參數(shù)資料
型號: L6911E
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: 1.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
封裝: SO-20
文件頁數(shù): 19/34頁
文件大小: 558K
代理商: L6911E
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VRM demo board description
L6911E
26/34
6.4
Input capacitor
For IOUT = 28.5A and with D = 0.5(worst case for input current ripple), Irms is equal to 17.8A.
Three OSCON electrolityc capacitors 6SP680M, with a maximum ESR equal to 12m
, are
chosen to substain the ripple. So the losses in worst case are:
Equation 25
6.5
Over-current protection
Substituting the demo board parameters in the relationship reported in the relative section,
(IOCSMIN = 170A; IP =33A; RDSONMAX = 3m) it results that ROCS = 1k.
PESR I
rms
2
1.25 670
()m
()W
==
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