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參數(shù)資料
| 型號： | MIC2583R-MBQS |
| 廠商： | MICREL INC |
| 元件分類： | 電源管理 |
| 英文描述： | Single Channel Hot Swap Controllers |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 190K |
| 代理商： | MIC2583R-MBQS |
MIC2582/MIC2583
Micrel
MIC2582/MIC2583
20
April 2003
two iterations, But it
’
s not a hard calculation to perform, and
tends to converge quickly.
Then the starting (steady-state)T
J
is:
T
J
T
A(MAX)
+
T
J
T
A(MAX)
+ [R
ON
+ (T
A(MAX)
–
T
A
)(0.005/
°
C)(R
ON
)]
x I
2
x R
θ
(J-A)
T
J
55
°
C + [17m
+ (55
°
C-25
°
C)(0.005)(17m
)]
x (2.5A)
2
x (50
°
C/W)
T
J
(55
°
C + (0.122W)(50
°
C/W)
61.1
°
C
Iterate the calculation once to see if this value is within a few
percent of the expected final value. For this iteration we will
start with T
J
equal to the already calculated value of 61.1
°
C:
T
J
T
A
+ [17m
+ (61.1
°
C-25
°
C)(0.005)(17m
)]
x (2.5A)
2
x (50
°
C/W)
T
J
( 55
°
C + (0.125W)(50
°
C/W)
61.27
°
C
So our original approximation of 61.1
°
C was very close to the
correct value. We will use T
J
= 61
°
C.
Finally, add (11.25W)(50
°
C/W)(0.08) = 45
°
C to the steady-
state T
J
to get T
J(TRANSIENT MAX.)
= 106
°
C. This is an accept-
able maximum junction temperature for this part.
PCB Layout Considerations
Because of the low values of the sense resistors used with the
MIC2582/83 controllers, special attention to the layout must
be used in order for the device
’
s circuit breaker function to
operate properly. Specifically, the use of a 4-wire Kelvin
connection to accurately measure the voltage across R
SENSE
is highly recommended. Kelvin sensing is simply a means of
making sure that any voltage drops in the power traces
connecting to the resistors does not get picked up by the
traces themselves. Additionally, these Kelvin connections
should be isolated from all other signal traces to avoid
introducing noise onto these sensitive nodes. Figure 11
illustrates a recommended, single layer layout for the R
SENSE
,
Normalized Thermal Transient Impedance, Junction-to-Ambient
Square Wave Pulse Duration (sec)
2
1
0.1
0.01
10
–
4
10
–
3
10
–
2
10
–
1
1
10
N
T
30
0.2
0.1
0.05
0.02
Single Pulse
Duty Cycle = 0.5
1. Duty Cycle, D =
2. Per Unit Base = R
thJA
= 50
°
C/W
3. T
JM
–
T
A
= P
DM
Z
thJA(t)
4. Surface Mounted
t
1
t
2
t
1
t
2
Notes:
P
DM
Figure 10. Transient Thermal Impedance
2
1
M
V
S
G
F
G
C
O
/
S
S
S
G
D
D
D
D
**C
POR
**C
GATE
**R
GATE
93.1k
1%
12.4k
1%
*POWER MOSFET
(SO-8)
*SENSE RESISTOR
(2512)
W
Current Flow
to the Load
Current Flow
to the Load
Current Flow
to the Load
DRAWING IS NOT TO SCALE
*See Table 4 for part numbers and vendors.
**Optional components.
Trace width (W) guidelines given in "PCB Layout Recommendations" section of the datasheet.
8
7
6
5
3
4
W
W
Figure 11. Recommended PCB Layout for Sense Resistor, Power MOSFET, and Feedback Network
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| MIC2583R-MBQS TR | 功能描述:IC CTRLR HOT SWAP 200MV 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
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| MIC2583R-MYQS TR | 功能描述:熱插拔功率分布 Single-Channel Hot-Swap Controller - 200mV Fast-Trip Threshold - Lead Free RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2584-JBTS | 功能描述:IC CTRLR HOT SWAP DUAL 16-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
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