參數(shù)資料
型號(hào)： 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)： 12/18頁
文件大?。?/td> 685K
代理商： MAX5948A
M
The UV pin is also used to reset the circuit breaker after
a fault condition has occurred. The UV pin can be
pulled below V
UVL
to reset the circuit breaker.
Figure 11a shows how to program the undervoltage
and overvoltage trip thresholds using three resistors.
With R4 = 562k
, R5 = 9.09k
, and R6 = 10k
, the
undervoltage threshold is set to 37.2V (with a 37.8V
release from undervoltage) and the overvoltage is set
to 71.1V (with a 69.9V release from overvoltage).
More hysteresis can be added to the undervoltage
lockout with the circuit shown in Figure 11b. Resistor
R3 connected between GATE and UV lowers the sup-
ply undervoltage lockout threshold (supply voltage
decreasing) to:
where V
UVL
is typically 1.223V. The supply voltage to
release from undervoltage lockout (supply voltage
increasing) is:
where V
UVH
is typically 1.243V. The supply undervolt-
age lockout hysteresis is the difference, or:
where V
UVHY
is typically 20mV.
V
V
R
R
R
R
R
R
R
R
V
R
R
UVHYS
,
UVHY
GATE
=
×
+
×
×
+
×
×
2
3
1
2
3
3
1
2
1
3
V
V
R
R
R
R
R
R
R
R
UVLH
,
UVH
=
×
+
×
×
+
×
2
3
1
2
3
3
1
2
V
V
R
R
R
R
R
R
R
R
V
R
R
UVHL
,
UVL
GATE
=
×
+
×
×
+
×
×
2
3
1
2
3
3
1
2
1
3
-48V Hot-Swap Controllers
with External R
SENSE
12
______________________________________________________________________________________
V
EE
V
DD
OV
UV
MAX5948A
MAX5948B
-48V RTN
-48V
UV
= 1.223 R4 + R5 + R6
V
R4
R5
R6
-48V RTN
(SHORT PIN)
OV
= 1.223 R4 + R5 + R6
V
Figure 11a. Undervoltage and Overvoltage Sensing
V
EE
SENSE
GATE
V
DD
UV
OV
MAX5948
-48V RTN
= 37.6V
UV
-48V RTN
(SHORT PIN)
*
-48V
*DIODES INC. SMAT70A.
R1
562k
1%
R4
506k
1%
R2
16.9k
1%
R5
8.87k
1%
R7
0.02
5%
R6
10
5%
C1
150nF
25V
Q1
IRF530
R3
1.62M
1%
= 43V
UV
= 71V
OV
Figure 11b. Programmable Hysteresis For Undervoltage
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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