參數(shù)資料
型號(hào): SP6127_07
英文描述: Evaluation Board Manual
中文描述: 評(píng)估板手冊(cè)
文件頁(yè)數(shù): 6/8頁(yè)
文件大?。?/td> 362K
代理商: SP6127_07
6
R1
200k, 1%
R2
SP6127
VFB
+
-
RZ2
200k
CZ2
130pF
CP1
2pF
Error Amplifier
Vref=0.6V
Vout
RZ
CZ
Figure 9- RZ and CZ in conjunction with internal
compensation components form a Type-III compensation
Loop Compensation for the SP6127EB
L = 3.3uH, C = 22uF/5mOhm ceramic capacitor
From equation (2) f
ESRZERO
= 1.45MHz. From equation (3) f
DBPOLE
= 18.7 kHz. Since the
condition specified in (1) is not met, Type-III compensation has to be used by adding
external components RZ and CZ. Using equation (4) CZ is calculated 34pF (use 33pF).
Following the guideline given in table 1, a 2kOhm RZ was used.
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