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參數(shù)資料
| 型號： | MAX5920 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CFP -55 to 125 |
| 中文描述： | -48V熱插拔控制器，外置RSENSE |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 310K |
| 代理商： | MAX5920 |
M
Detailed Description
The MAX5920A/MAX5920B are integrated hot-swap
controllers for -48V power systems. They allow circuit
boards to be safely hot plugged into a live backplane
without causing a glitch on the power-supply rail. When
circuit boards are inserted into a live backplane, the
bypass capacitors at the input of the board
’
s power
module or switching power supply can draw large
inrush currents as they charge. The inrush currents can
cause glitches on the system power-supply rail and
damage components on the board.
The MAX5920A/MAX5920B provide a controlled turn-on
to circuit cards preventing glitches on the power-supply
rail and damage to board connectors and components.
Both the MAX5920A and MAX5920B provide undervolt-
age, overvoltage, and overcurrent protection. The
MAX5920A/MAX5920B ensure the input voltage is sta-
ble and within tolerance before applying power to the
load. The devices also provide protection against input
voltage steps. During an input voltage step, the
MAX5920A/MAX5920B limit the current drawn by the
load to a safe level without turning off power to the load.
-48V Hot-Swap Controller
with External R
SENSE
8
_______________________________________________________________________________________
Pin Description
PIN
MAX5920A MAX5920B
NAME
FUNCTION
1
—
PWRGD
Power-Good Signal Output.
PWRGD
is an active-low open-drain status output referenced
to V
EE
.
PWRGD
is latched low when V
DRAIN
- V
EE
≤
V
DL
and V
GATE
> (
V
GATE
- V
GH
),
indicating a power-good condition.
PWRGD
is open drain otherwise.
—
1
PWRGD
Power-Good Signal Output. PWRGD is an active-high open-drain status output referenced
to DRAIN. PWRGD latches in a high-impedance state when V
DRAIN
- V
EE
≤
V
DL
and
V
GATE
> (
V
GATE
- V
GH
), indicating a power-good condition. PWRGD is pulled low to
DRAIN otherwise.
2
2
OV
Input Pin for Overvoltage Detection. OV is referenced to V
EE
. When OV is pulled above
V
OVH
voltage, the GATE pin is immediately pulled low. The GATE pin remains low until the
OV pin voltage reduces to V
OVL
.
3
3
UV
Input Pin for Undervoltage Detection. UV is referenced to V
EE
. When UV is pulled above
V
UVH
voltage, the GATE is enabled. When UV is pulled below V
UVL
, GATE is pulled low.
UV is also used to reset the circuit breaker after a fault condition. To reset the circuit
breaker, pull UV below V
UVL
. The reset command can be issued immediately after a fault
condition; however, the device does not restart until a t
OFF
delay time has elapsed after
the fault.
Device Negative Power-Supply Input. Connect to the negative power-supply rail.
4
4
V
EE
5
5
SENSE
Current-Sense Voltage Input. Connect to an external sense resistor and the external
MOSFET source. The voltage drop across the external sense resistor is monitored to detect
overcurrent or short-circuit fault conditions. Connect SENSE to V
EE
to disable the current-
limiting feature.
6
6
GATE
Gate Drive Output. Connect to gate of the external N-channel MOSFET.
7
7
DRAIN
Output-Voltage Sense Input. Connect to the output-voltage node (drain of external
N-channel MOSFET). Place the MAX5920_ so the DRAIN pin is close to the DRAIN of the
external MOSFET for the best thermal protection.
8
8
V
DD
Positive Power-Supply Rail Input. This is the power ground in the negative-supply voltage
system. Connect to the higher potential of the power-supply inputs.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX5920AESA | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125 |
| MAX5920BESA | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CFP -55 to 125 |
| MAX5945 | Quad Network Power Controller for Power-Over-LAN |
| MAX5945CAX | Quad Network Power Controller for Power-Over-LAN |
| MAX5945EAX | Quad Network Power Controller for Power-Over-LAN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5920AESA | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5920AESA+ | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5920AESA+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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5920AESA-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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5920BESA | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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