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參數(shù)資料
| 型號(hào)： | RC5041 |
| 廠商： | Raytheon Company |
| 元件分類(lèi)： | DC/DC變換器 |
| 英文描述： | Programmable DC-DC Converter for Pentium P55C, K6 and 6x86MX (M2) Processors |
| 中文描述： | 可編程DC - DC轉(zhuǎn)換為奔騰P55C，K6和6x86MX量（M2）處理器 |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 119K |
| 代理商： | RC5041 |
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RC5041
PRODUCT SPECIFICATION
10
P
Converter Efficiency
Losses due to parasitic resistance in the switches, coil,
and sense resistor dominate at high load-current level.
The major loss mechanisms under heavy loads, in usual
order of importance, are:
MOSFET I
2
R Losses
Inductor coil losses
Sense resistor losses
Gate-charge losses
Diode-conduction losses
Transition losses
Input capacitor losses
Losses due to the operating supply current of the IC.
Efficiency of the converter under heavy loads can be calculated as follows:
,
where
Design Equations:
where 1.5 is the temperature multiplier
where
, where
is the gate charge and f is the switching frequency
, where C
RSS
is the reverse transfer capacitance of the MOSFET.
Example:
Efficiency
P
IN
-p
I
V
×
OUT
V
OUT
P
LOSS
I
=
=
P
LOSS
PD
MOSFET
PD
INDUCTOR
PD
RSENSE
PD
GATE
PD
DIODE
PD
TRAN
PD
CAP
PD
IC
+
+
+
+
+
+
+
=
(1) PD
MOSFET
I
OUT
2
R
DS ON
)
1.5
×
(
)
×
DutyCycle
×
=
DutyCycle
V
V
IN
D
V
SW
–
V
D
+
---------------------+
=
(2) PD
INDUCTOR
I
OUT
2
R
INDUCTOR
×
=
(3) PD
RSENSE
I
OUT
2
R
SENSE
×
=
(4) PD
GATE
q
GATE
f
5V
×
×
=
q
GATE
(5) PD
DIODE
V
f
I
OUT
×
1
Dutycycle
–
(
)
=
(6) PD
TRAN
V
-----------------------------------I
2
C
I
DRIVE
LOAD
f
×
=
(7) PD
CAP
I
RMS
2
ESR
×
=
(8) PD
IC
V
CC
I
CC
×
=
DutyCycle
+
10
2
0.5
–
+
5
0.5
0.1
---3.3
0.70
=
=
PD
MOSFET
10
2
0.010
1.5
×
(
)
×
0.70
×
1.05W
=
=
PD
INDUCTOR
0.010
×
1W
=
=
PD
RSENSE
10
2
0.0065
×
0.65W
=
=
PD
GATE
CV
f
×
5V
×
1.75nf
9
1
–
(
)
V
300Khz
5V
×
×
×
0.021W
=
=
=
PD
DIODE
0.5
10 1
0.70
–
)
×
1.5W
=
=
PD
TRAN
2
5
400pf
×
10
×
300khz
×
0.7A
0.074W
～
=
PD
CAP
7.5
2.5
–
(
)
2
0.015
×
0.37W
=
=
PD
IC
0.2W
=
PD
LOSS
1.05W
1.0W
0.65W
0.021W
1.50W
0.074W
0.37W
0.2W
+
+
+
+
+
+
+
4.865W
=
=
Efficiency
10
4.865
+
×
3.3
10
----------3.3
87%
～
=
∴
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RC5041M | 制造商:RAYTHEON 制造商全稱(chēng):RAYTHEON 功能描述:Programmable DC-DC Converter for Pentium P55C, K6 and 6x86MX (M2) Processors |
| RC5042 | 制造商:RAYTHEON 制造商全稱(chēng):RAYTHEON 功能描述:Programmable DC-DC Converter |
| RC5042M | 制造商:RAYTHEON 制造商全稱(chēng):RAYTHEON 功能描述:Programmable DC-DC Converter |
| RC5042MT | 制造商:RAYTHEON 功能描述:* |
| RC5043 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
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