參數(shù)資料
型號(hào): TPS40130DBTG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO30
封裝: GREEN, PLASTIC, TSSOP-30
文件頁(yè)數(shù): 9/38頁(yè)
文件大小: 950K
代理商: TPS40130DBTG4
www.ti.com
200
40
20
0
20
40
60
80
100
50
0
50
100
150
10
100
1 k
10 k
100 k
1 M
G
Gain
dB
Phase
°
f Frequency Hz
ESR Zero
Load Pole
Droop Zero
Modulator
Converter Overall
EA
Modulator
Converter Overall
EA
200
10
40
100
1 k
10 k
100 k
1 M
20
0
20
40
60
80
100
50
0
50
100
150
f Frequency Hz
G
Gain
dB
Phase
°
Modulator
Phase
Converter Overall
EA
Type II
ESR Zero
Load Pole
Modulator
Converter Overall
EA
f
DROOPZ +
1
2p
V
DROOP
I
OUT(max)
C
OUT
(20)
SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005
GAIN AND PHASE
vs
FREQUENCY WITHOUT DROOP
FREQUENCY WITH DROOP
Figure 6.
Figure 7.
The droop function, as well as the the output capacitor ESR, introduce a zero on some frequency left from the
crossover point. See Equation 20
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.
17
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