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參數(shù)資料
| 型號： | MAX5948A |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | -48V Hot-Swap Controllers with External RSENSE |
| 中文描述： | -48V熱插拔控制器，外置RSENSE |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 685K |
| 代理商： | MAX5948A |
M
-48V Hot-Swap Controllers
with External R
SENSE
10
______________________________________________________________________________________
Figure 9. Resistor R7 and capacitor C3 slow down the
response of the circuit breaker to filter momentary
glitches in the SENSE voltage. The additional delay
time can be estimated with the following equation:
where I
f
is the current in fault condition, I
I
is the initial
current before the fault, and I
CB
is the circuit-breaker
trip current (I
CB
= V
CB
/R1). Alternatively, the corre-
sponding voltages across the sense resistor (V
f
, V
I
, and
V
CB
) may be used in the equation as shown. The
SENSE pin of the MAX5948A/MAX5948B sources very
little current (0.02μA typ), so the addition of resistor R7
will introduce very little error in the circuit-breaker trip
voltage. For example, a 10k
resistor for R7 will only
cause a 200μV offset.
Example: A system has a 1A nominal load current and
a 20m
sense resistor. The circuit-breaker delay needs
to be increased to 50μs in response to a load current
t
R
C
In
V
V
V
V
R
C
In
I
I
I
I
cbdly
f
I
f
CB
f
I
f
CB
=
×
×
=
×
×
7
3
7
3
GATE - V
EE
5V/div
V
EE
50V/div
INRUSH
CURRENT
2A/div
4ms/div
CONTACT
BOUNCE
Figure 8. Startup Into a Short Circuit
V
EE
SENSE
GATE
DRAIN
V
DD
OV
UV
PWRGD
MAX5948A
-48V RTN
-48V
R4
562k
1%
R5
9.09k
1%
R6
10k
1%
R1
0.02
5%
R3
18k
5%
R2
10
5%
C1
150nF
25V
Q1
IRF530
C2
3.3nF
100V
C4
100
μ
F
100V
*
-48V RTN
(SHORT PIN)
*DIODES INC. SMAT70A.
C3
R7
Figure 9. Extending the Short-Circuit Protection Delay
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5948AESA | -48V Hot-Swap Controllers with External RSENSE |
| MAX5948B | 4-2-3-2 Input AND-OR-invert Gates 14-CDIP -55 to 125 |
| MAX5948BESA | -48V Hot-Swap Controllers with External RSENSE |
| MAX5949 | -48V Hot-Swap Controllers with External RSENSE |
| MAX5949AESA | -48V Hot-Swap Controllers with External RSENSE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5948AESA | 功能描述:熱插拔功率分布 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 |
| MAX5948AESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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 |
| MAX5948AESA+T | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller 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 |
| MAX5948AESA-T | 功能描述:熱插拔功率分布 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 |
| MAX5948BESA | 功能描述:熱插拔功率分布 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 |
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