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参数资料
| 型号： | MAX5916AEUI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/25页 |
| 文件大小： | 488K |
| 描述： | IC HOT-SWAP CTRLR DUAL 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | PCI 2.2 服务器 |
| 内部开关： | 无 |
| 电源电压： | 10.8 V ~ 13.2 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
Applications Information
Component Selection
External MOSFETs
Select the external n-channel MOSFETs according to
the applications current requirement. Limit switch power
dissipation by choosing a MOSFET with an R
DS(ON)
low
enough to have a minimum voltage drop at full load.
High R
DS(ON)
causes output ripple if the board has
pulsing loads. High R
DS(ON)
can trigger an external
undervoltage fault at full load. Determine the MOSFETs
power rating requirement to accommodate a short-cir-
cuit condition on the board during startup (see the
External MOSFET Thermal Considerations section).
Table 3 lists MOSFET and sense resistor manufacturers.
Sense Resistors
The overcurrent sense voltage threshold on the +3.3V
output is 46mV and 31mV on the +5V output. Choose a
sense resistor using the following equation:
R
SENSE
= (V-
ILIM
/ I
LOAD
)
where I
LOAD
is the brickwall current limit for the output.
Choose the sense resistors power rating to accommo-
date the overload current:
P
SENSE
= (I
LOAD
)
2
x R
SENSE
Additional External Gate Capacitance
Connecting an external capacitance from the gates of
the external MOSFETs to GND slows the turn on of the
+5V and +3.3V supplies.
Dual PCI 2.2 Hot-Swap Controllers
16 ______________________________________________________________________________________
t
DELAY
t
DELAY
t
DELAY
t
RESTART
t
RESTART
t
RESTART
ENABLE_+12VIN
STARTUP_+12VIN
OC_3.3VAUXO_
UV_3.3VAUXO_
RESET
RESET
RESET
D
Q
V
Q
POSITIVE EDGE
TRIGGERED D FLIP-FLOP,
RESET IS ACTIVE LOW
OC_3.3VO_
OC_5VO_
OC_+12VO_
OC_-12VO_
UV_3.3VO_
UV_5VO_
UV_+12VO_
POSITIVE EDGE TRIGGERED D FLIP-FLOP,
RESET IS ACTIVE LOW
HIGH = MAIN SUPPLIES
ARE TURNED OFF
MAIN OFF
AUX OFF
HIGH = AUX SUPPLY
TURNED ON
ENABLE_3.3VAUXIN
STARTUP_3.3VAUXIN
V = INTERNAL SUPPLY LOGIC
GENERATED BY THE 12VIN OR THE
3.3VAUXIN, WHICHEVER IS HIGHER
RESET
D
Q
V
Q
SEE TABLE 2 FOR EXPLANATION OF SIGNALS.
Figure 4. Main and Auxiliary Supply Shutdown Control Logic for MAX5916/MAX5916A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5916AUUI+ | 功能描述:热插拔功率分布 Dual PCI 2.2 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 |
| MAX5916AUUI+T | 功能描述:热插拔功率分布 Dual PCI 2.2 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 |
| MAX5916EUI | 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 |
| MAX5916EUI+ | 功能描述:热插拔功率分布 Dual PCI 2.2 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 |
| MAX5916EUI+T | 功能描述:热插拔功率分布 Dual PCI 2.2 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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