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參數(shù)資料
| 型號： | IR3082M |
| 廠商： | International Rectifier |
| 英文描述： | XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| 中文描述： | XPHASE AMD皓龍/速龍64控制IC |
| 文件頁數(shù)： | 13/33頁 |
| 文件大?。?/td> | 444K |
| 代理商： | IR3082M |
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IR3082
Page 13 of 13
12/17/04
The voltage at the VDRP pin is a buffered version of the share bus and represents the sum of the DAC voltage and
the average inductor current of all the phases. The VDRP pin is connected to the FB pin through the resistor R
VDRP
.
Since the Error Amp will force the loop to maintain FB to be equal to the VDAC reference voltage, current will flow
into the FB pin equal to (VDRP-VDAC) / R
VDRP
. When the load current increases, the adaptive positioning voltage
increases accordingly. More current flows through the feedback resistor R
FB
, and makes the output voltage lower
proportional to the load current. The positioning voltage can be programmed by the resistor R
VDRP
so that the droop
impedance produces the desired converter output impedance. The offset and slope of the converter output
impedance are referenced to and therefore independent of the VDAC voltage.
VDAC
Rvdrp
Rfb
ISHARE
VDAC
Ifb
CS+
CS-
EA
Vo
VDRP
IIN
Phase IC
VDAC
ISHARE
CS+
Phase IC
CS-
+
-
Current Sense
Amplifier
10k
VDAC
.
FB
Error
Amplifier
+
-
Current Sense
Amplifier
+
-
+
-
Control IC
Droop
Amplifier
10k
Figure 8 - Adaptive voltage positioning
Inductor DCR Temperature Correction
If the thermal compensation of the inductor DCR provided by the temperature dependent gain of the current sense
amplifier is not adequate, a negative temperature coefficient (NTC) thermistor can be used for additional correction.
The thermistor should be placed close to the inductor and connected in parallel with the feedback resistor as shown
in Figure 9. The resistor in series with the thermistor is used to reduce the nonlinearity of the thermistor.
Figure 9 - Temperature compensation of inductor DCR
VDAC
Rvdrp
Rfb
Ifb
EA
VDRP
Vo
IIN
Error
Amplifier
+
-
+
-
Control IC
Droop
Amplifier
Rfb
Rt
FB
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IR3082MPBF | 功能描述:IC XPHASE CONTROL 20-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase™ 應用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:37 系列:- 應用: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 供應商設備封裝:56-TQFN-EP（8x8） 包裝:管件 |
| IR3082MPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:20-MLPQ |
| IR3082MTR | 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| IR3082MTRPBF | 功能描述:IC CTLR XPHASE 20-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase™ 應用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:37 系列:- 應用: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 供應商設備封裝:56-TQFN-EP（8x8） 包裝:管件 |
| IR3083MPBF | 制造商:International Rectifier 功能描述:IC XPHASE CONTROL SMD 3083 |
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