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参数资料
| 型号： | MAX5946AETX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/23页 |
| 文件大小： | 1102K |
| 描述： | IC CNTRLR PCI EXP DL 36TQFN |
| 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： | 通用型，PCI Express? |
| 内部开关： | 无 |
| 电源电压： | 3.3V，12V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 带卷 (TR) |
12V and 3.3V Outputs Normal Operation
The MAX5946 monitors and actively limits the current of
the 12V and 3.3V outputs after the startup period. Each
output has its own overcurrent threshold. If any of the
monitored output currents rise above the overcurrent
threshold for a period t
FAULT
, FAULT_ asserts and the
controller disengages both the 12V and 3.3V outputs for
the particular slot (see the Fault Management section).
3.3V Auxiliary Output Normal Operation
The auxiliary output current is internally monitored and
actively limited to the maximum current-limit value. An
overcurrent fault condition occurs when the output
current exceeds the overcurrent threshold for longer
then t
FAULT
. A fault on an auxiliary channel causes all
supplies of the affected channel to be disabled after a
programmable time period t
FAULT
(see the Fault
Management section).
Power-Good (PPWWRRGGDD__)
Power-good (PWRGD_) is an open-drain output that
pulls low a time (t
POR_HL
) after all of the outputs of the
respective slot are fully on. All outputs are considered
fully on when 3.3G_ has risen to V
PGTH3.3
, 12G_ has
risen to V
PGTH12
, and V
3.3AUXO_
is less then
V
PGTH3.3AUX
. t
POR_HL
is adjustable from 2.5ms to
1.5s by connecting a resistor from PORADJ to GND.
See the Setting the Power-On-Reset Timeout Period
(t
POR
) section.
Thermal Shutdown
When the die temperature goes above (T
SD
) +150癈, an
overtemperature fault occurs and the MAX5946 shuts
down all outputs. The device waits for the junction temper-
ature to decrease below T
SD
- Hysteresis before entering
fault management (see the Fault Management section).
Dual PCI Express, Hot-Plug
Controller
16 ______________________________________________________________________________________
V
ON_,TH
ON_, AUXON_
PWRGD_
FAULT_
12G_, 3.3G_
12VO_, 3.3VO_
3.3VAUXO_
V
PGTH12
V
PGTH3.3
V
PGTH3.3AUX
3.3AUXIN
RISING
EDGE
PWRGD_ IS PULLED UP TO 3.3.
FAULT_ IS PULLED UP TO 3.3AUXIN.
t
POR_HL
Figure 2. Power-Up Timing, No Fault
FAULT_
3.3VAUXIN
RISING
EDGE
PWRGD_ IS PULLED UP TO 3.3VAUXO_.
FAULT_ IS PULLED UP TO 3.3VAUXIN.
A FAULT ON THE 3.3V OUTPUT OR 3.3VAUXO_ OUTPUT PRODUCES SIMILAR RESULTS.
V
ON_,TH
ON_
2 x t
FAULT
PWRGD_
12G_
12V OUTPUT
CURRENT
3.3VAUXO_
V
12ILIM,TH
R
SENSE
Figure 3. 12V Power-Up Timing (Turn-On into Output
Overcurrent/Short Circuit)
FAULT_
PWRGD_ IS PULLED UP TO 3.3VAUXO_.
FAULT_ IS PULLED UP TO 3.3VAUXIN.
A FAULT ON THE 3.3V OUTPUT OR 3.3VAUXO_ OUTPUT PRODUCES SIMILAR RESULTS.
t
FAULT
PWRGD_
12G_
12V OUTPUT
CURRENT
V
12ILIM,TH
R
SENSE
Figure 4. 12 Output Overcurrent/Short Circuit During Normal
Operation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5946LETJ | 制造商:Maxim Integrated Products 功能描述:DUAL PCI-EXPRESS HOT-PLUG CONTROLLER - Rail/Tube |
| MAX5946LETX | 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 |
| MAX5946LETX+ | 功能描述:热插拔功率分布 Dual PCIe Hot-Plug 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 |
| MAX5946LETX+T | 功能描述:热插拔功率分布 Dual PCIe Hot-Plug 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 |
| MAX5946LETX-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 |
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