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参数资料
| 型号： | MAX5920AESA+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/18页 |
| 文件大小： | 310K |
| 描述： | IC HOT-SWAP CTRLR -48V 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | -20 V ~ -80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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 boards 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
d 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
d 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.
4
4
V
EE
Device Negative Power-Supply Input. Connect to the negative power-supply rail.
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5920AESA+ | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5920AESA+T | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5920AESA-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5920BESA | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5920BESA+ | 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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