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參數(shù)資料
| 型號： | IR3500MPBF |
| 廠商： | International Rectifier |
| 英文描述： | XPHASE3TM VR11.0 & AMD PVID CONTROL IC |
| 中文描述： | XPHASE3TM VR11.0 |
| 文件頁數(shù)： | 34/47頁 |
| 文件大小： | 778K |
| 代理商： | IR3500MPBF |
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IR3500
Page 34 of 47
June 12, 2007
2
2
)
*
*
*
2
+
1
*
5
)
2
C
C
I
FB
E
E
C
CP
R
C
f
V
R
C
L
f
R
π
π
=
(26)
CP
E
E
CP
R
C
L
C
=
10
(27)
C
CP1
is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise.
A ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for AVP Applications
Determine the compensation at no load, the worst case condition. Assume the time constant of the resistor and
capacitor across the output inductors matches that of the inductor, the crossover frequency and phase margin of
the voltage loop can be estimated by (28) and (29), where R
LE
is the equivalent resistance of inductor DCR.
R
f
*
*
2
π
LE
FB
CS
E
DRP
C
R
R
G
C
=
1
(28)
π
θ
180
)
tan(
90
1
=
A
C
(29)
Choose the desired crossover frequency fc around fc1 estimated by (28) or choose fc between 1/10 and 1/5 of
the switching frequency per phase, and select the components to ensure the slope of close loop gain is -20dB
per decade around the crossover frequency. Choose resistor R
FB1
according to (30), and determine C
FB
and
C
DRP
from (31) and (32).
1
1
=
to
FB
FB
R
R
3
1
FB
R
f
π
FB
FB
R
R
2
2
1
=
(30)
1
4
FB
C
C
=
(31)
DRP
FB
FB
FB
DRP
R
C
R
R
C
+
=
)
(
1
(32)
R
CP
and C
CP
have limited effect on the crossover frequency, and are used only to fine tune the crossover
frequency and transient load response. Determine R
CP
and C
CP
from (33) and (34).
2
=
I
FB
E
E
C
CP
V
R
C
L
f
R
5
)
2
π
(33)
CP
E
E
CP
R
C
L
C
=
10
(34)
C
CP1
is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise.
A ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for Non-AVP Applications
Resistor R
DRP
and capacitor C
DRP
are not needed. Choose the crossover frequency fc between 1/10 and 1/5 of
the switching frequency per phase and select the desired phase margin
θ
c. Calculate K factor from (35), and
determine the component values based on (36) to (40),
θ
π
)]
5
+
180
(
4
tan[
=
C
K
(35)
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|---|---|
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IR3500MTRPBF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 COMPLETE VR11.0 OR AMD PVID PWR SOLTION RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| IR3500V | 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC |
| IR3500VMPBF | 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC |
| IR3500VMTRPBF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 X-PHASE IR3500V AMD SVID CTRL IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| IR3502 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
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