參數(shù)資料
型號: TPS40090QPWRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO24
封裝: GREEN, PLASTIC, TSSOP-24
文件頁數(shù): 8/23頁
文件大小: 309K
代理商: TPS40090QPWRQ1
200
-40
-20
0
20
40
60
80
-100
-50
0
50
100
150
10
100
1 k
10 k
100 k
1 M
GAIN AND PHASE
vs
FREQUENCY WITH DROOP
G
-
Gain
-
dB
Phase
-
°
f - Frequency - Hz
ESR Zero
Load Pole
Droop Zero
F
DROOPZ +
1
2p
V
DROOP
I
OUT(max)
C
OUT
C2 +
C1
2p
R2
C1
F
DROOPZ * 1
SLUS845C
– JUNE 2008 – REVISED MAY 2011
Figure 9.
The droop function, as well as the output capacitor ESR, introduces zero on some frequency left of the crossover
point.
(12)
To compensate for this zero, pole on the same frequency should be added to the error amplifier transfer function.
With Type II compensation network a new value for the capacitor C2 is required compared to the case without
droop.
(13)
16
Copyright
2008–2011, Texas Instruments Incorporated
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