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參數(shù)資料
| 型號： | DS232AS-N |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDSO16 |
| 封裝： | 0.300 INCH, SOIC-16 |
| 文件頁數(shù)： | 8/23頁 |
| 文件大?。?/td> | 409K |
| 代理商： | DS232AS-N |
MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
16
Maxim Integrated
Solving for CF:
3) Place a high-frequency pole at fP1 = 0.5 x fSW (to
attenuate the ripple at the switching frequency, fSW)
and calculate CCF using the following equation:
Type III Compensation Network
(See Figure 4)
When using a low-ESR tantalum or ceramic type, the
ESR-induced zero frequency is usually above the tar-
geted zero crossover frequency (fO). Use Type III com-
pensation. Type III compensation provides three poles
and two zeros at the following frequencies:
Two midband zeros (fZ1 and fZ2) cancel the pair of
complex poles introduced by the LC filter:
fP1 = 0
fP1 introduces a pole at zero frequency (integrator) for
nulling DC output voltage errors:
Depending on the location of the ESR zero (fZO), use
fP2 to cancel fZO, or to provide additional attenuation of
the high-frequency output ripple:
fP3 attenuates the high-frequency output ripple.
Place the zeros and poles so the phase margin peaks
around fO.
Ensure that RF>>2/gM and the parallel resistance of R1,
R2, and RI is greater than 1/gM. Otherwise, a 180°
phase shift is introduced to the response making the
loop unstable.
Use the following compensation procedure:
1) With RF ≥ 10k, place the first zero (fZ1) at 0.8 x fPO.
So:
2) The gain of the modulator (GAINMOD), comprises
the pulse-width modulator, LC filter, feedback
divider, and associated circuitry at the crossover
frequency is:
GN
V
fL
C
IN
RAMP
OOUT
OUT
AI MOD =×
×
() ××
1
2
π
GN
V
IN
RAMP
AI MOD =× (2π
f
RC
f
Z
FF
PO
1
2
08
=
××
=×
π
.
f
R
CC
P
F
FCF
3
1
2
=
××
×
+
π
f
RC
P
II
2
1
2
=
××
π
f
RC
f
CR
R
Z
FF
Z
II
1
2
1
2
1
2
=
××
=
××
+
π
()
C
Rf
C
CF
FSW
F
=
××
1
π
C
Rf
F
FPO
=
××
×
1
20 75
π
.
VREF
R1
VOUT
R2
gM
RF
COMP
CF
CCF
Figure 3. Type II Compensation Network
VREF
gM
R1
R2
VOUT
RI
COMP
CI
CCF
RF
CF
Figure 4. Type III Compensation Network
相關PDF資料 |
PDF描述 |
|---|---|
| DS232AS | LINE TRANSCEIVER, PDSO16 |
| DS232A | LINE TRANSCEIVER, PDIP16 |
| DS2404S-001 | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS2404B | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS2404 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS232AS-N+ | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS232AS-NTR | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS232AS-NTR+ | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS233 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| DS233AS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
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