參數(shù)資料
型號(hào)： IR3500
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(yè)數(shù)： 33/47頁(yè)
文件大?。?/td> 778K
代理商： IR3500
IR3500
Page 33 of 47
June 12, 2007
)]
1
1
(
*
[
*
_
_
ROOM
MAX
L
THERM
B
THERM
R
TMAX
R
T
T
EXP
=
(22)
Select the series resistor R
HOTSET2
to linearize the NTC thermistor, which has non-linear characteristics in the
operational temperature range. Then calculate R
HOTSET1
corresponding to the allowed maximum temperature
TMAX from (23).
*
)
(
2
1
=
R
HOTSET
6
)
(
+
VCCL
R
R
HOTSET
TMAX
(23)
VOLTAGE LOOP COMPENSATION
The adaptive voltage positioning (AVP) is usually adopted in the computer applications to improve the transient
response and reduce the power loss at heavy load. Like current mode control, the adaptive voltage positioning
loop introduces an extra zero to the voltage loop and splits the double poles of the power stage, which makes the
voltage loop compensation much easier.
Adaptive voltage positioning lowers the converter voltage by R
O
*I
O,
where R
O
is the
required
output impedance of
the converter. Pre-select feedback resistor R
FB,
and calculate the droop resistor RDRP,
G
R
R
R
O
CS
MAX
R
L
FB
DRP
n
=
*
_
(25)
The selection of compensation types depends on the output capacitors used in the converter. For applications
using Electrolytic, Polymer or AL-Polymer capacitors and running at lower frequency, type II compensation shown
in Figure 22(a) is usually enough. While for the applications using only ceramic capacitors and running at higher
frequency, type III compensation shown in Figure 22(b) is preferred.
For applications where AVP is not required, the compensation is the same as for the regular voltage mode
control. For converters using Polymer, AL-Polymer, and ceramic capacitors, which have much higher ESR zero
frequency, type III compensation is required as shown in Figure 22(b) with R
DRP
and C
DRP
removed.
RCP
CCP1
EAOUT
CCP
RFB
RDRP
VO+
VDRP
VDAC
+
-
EAOUT
FB
CFB
CDRP
RCP
EAOUT
CCP1
CCP
RFB
RDRP
VO+
VDRP
VDAC
FB
+
-
EAOUT
RFB1
(a) Type II compensation
(b) Type III compensation
Figure 22 - Voltage loop compensation network
Type II Compensation for AVP Applications
Determine the compensation at no load, the worst case condition. Choose the crossover frequency fc between
1/10 and 1/5 of the switching frequency per phase. Assume the time constant of the resistor and capacitor across
the output inductors matches that of the inductor, and determine R
CP
and C
CP
from (26) and (27), where L
E
and
C
E
are the equivalent inductance of output inductors and the equivalent capacitance of output capacitors
respectively.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IR3500A 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASE3TM VR11.0 & AMD PVID CONTROL IC
IR3500AMPBF 功能描述:IC CTRL XPHASE3 VR11.0 32-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase3™ 應(yīng)用說(shuō)明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件
IR3500AMTRPBF 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 IR3500 IC xPHASE3 AMD PVID 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
IR3500MPBF 功能描述:IC XPHASE3 CONTROL 32-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase3™ 應(yīng)用說(shuō)明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件
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
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