參數(shù)資料
型號(hào)： MAX5948AESA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： -48V Hot-Swap Controllers with External RSENSE
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： 0.150 INCH, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 13/18頁(yè)
文件大?。?/td> 685K
代理商： MAX5948AESA
A separate resistor-divider must be used for the over-
voltage lockout setting. The supply overvoltage lockout
threshold is:
where V
OVH
is typically 1.223V.
Using R1 = 562k
, R2 = 16.9k
, R3 = 1.62M
, R4 =
506k
, R5 = 8.87k
, and the typical value of V
GATE
=
13.5V results in the following thresholds:
V
UV,HL
= 37.6V
V
UV,LH
= 43V
(with hysteresis now increased to 5.4V), and V
OV
= 71V
(with 1.2V hysteresis).
PWRGD
/PWRGD Output
The
PWRGD
(PWRGD) output can be used directly to
enable a power module after hot insertion. The
MAX5948A (
PWRGD
) can be used to enable modules
with an active-low enable input (Figure 13), while the
MAX5948B (PWRGD) is used to enable modules with
an active-high enable input (Figure 12).
The PWRGD signal is referenced to the DRAIN termi-
nal, which is the negative supply of the power module.
The
PWRGD
signal is referenced to V
EE
.
When the DRAIN voltage of the MAX5948A is high with
respect to V
EE
, the internal pulldown MOSFET Q2 is off
and the
PWRGD
pin is in a high-impedance state
(Figure 13).
PWRGD
is pulled high by the module’s
internal pullup current source, turning the module off.
When the DRAIN voltage drops below V
PG
, Q2 turns on
and
PWRGD
pulls low, enabling the module.
The
PWRGD
signal can also be used to turn on an LED
or optoisolator to indicate that the power is good
(Figure 13) (see the
Component Selection Procedure
section).
V
V
R
R
R
OV
OVH
=
+
4
5
5
M
-48V Hot-Swap Controllers
with External R
SENSE
______________________________________________________________________________________
13
PWRGD
I1
V
EE
V
PG
-48V
R1
R2
C1
Q1
R3
C2
MAX5948B
V
IN+
V
IN-
C4
Q2
Q3
V
OUT+
V
OUT-
ON/OFF
VICOR
VI-J3D-CY
DRAIN
GATE
SENSE
V
EE
V
DD
R4
R5
R6
*
*DIODES INC. SMAT70A.
-48V RTN
-48V RTN
(SHORT PIN)
UV
OV
Figure 12. Active-High Enable Module
相關(guān)PDF資料
PDF描述
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
MAX5949BESA Dual D-type Positive-Edge-Triggered Flip-Flops With Preset And C 14-CDIP -55 to 125
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 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
MAX5948BESA+ 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
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