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參數(shù)資料
| 型號(hào)： | MAX5915 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Dual PCI 2.2 Hot-Swap Controllers |
| 中文描述： | 雙路PCI 2.2熱插拔控制器 |
| 文件頁數(shù)： | 14/25頁 |
| 文件大?。?/td> | 657K |
| 代理商： | MAX5915 |
M
Input Undervoltage Lockout
UVLO prevents the MAX5915/MAX5916 from turning on
internal/external MOSFETs until the input voltage
exceeds the lockout threshold. The UVLO protects the
MOSFETs from insufficient gate-drive voltage. Figure 2
shows that if an input undervoltage condition exists for
more than t
DEG,UVLO
, the outputs are disabled and
PGOOD_ goes low immediately. The time delay
t
DEG,UVLO
is negative edge delayed and acts as a
deglitch.
Fault Management
When a fault is detected on one of the main outputs,
the MAX5915/MAX5916 disable the channel outputs
after t
DELAY
. A fault occurs when any of the output volt-
ages fall below their output undervoltage threshold or
any of the output currents exceed their output
overcurrent threshold. PGOOD_ pulls low if a fault
persists for more than t
RESP
. The channel with the fault
is disabled after t
DELAY
. If the fault is removed before
t
DELAY
, the channel remains on and PGOOD_ pulls high
immediately.
Latched Fault Protection
The MAX5915 latches off the appropriate channel
’
s
main outputs. Toggling +12VIN or ON_ restarts the
main outputs. Figure 3 outlines the logic for the main
and auxiliary shutdown control of the MAX5915, while
fault handling is shown in Figures 5 and 6.
Autoretry Fault Protection
The MAX5916 automatically restarts the outputs after
t
RESTART
. Both the MAX5915 and the MAX5916 handle
faults on the auxiliary outputs by automatically restart-
ing the appropriate channel. Figure 4 outlines the logic
for the main and auxiliary shutdown control of the
MAX5916, while fault handling is shown in Figures 6
and 7.
Output Overcurrent
External sense resistors monitor the current on the +5V
and +3.3V outputs, while the +3.3V auxiliary and
±
12V
output currents are monitored internally. Figures 5, 6,
and 7 show overcurrent fault management for the
MAX5915/MAX5916.
Dual PCI 2.2 Hot-Swap Controllers
14
______________________________________________________________________________________
ON_
+12VIN
3.3VAUXIN
PGOOD_
AUXON_
+12V UVLO THRESHOLD
3.3VAUX UVLO THRESHOLD
t
START
t
START
t
DEG.UVLO
t
DEG.UVLO
+12VO_
5VO_
3.3VO_
3.3VAUXO_
-12VO_
TIMING NOT TO SCALE
Figure 2. Input UVLO Fault Management in the MAX5915/MAX5916
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5915A | Dual PCI 2.2 Hot-Swap Controllers |
| MAX5915AEUI | Dual PCI 2.2 Hot-Swap Controllers |
| MAX5921 | -48V Hot-Swap Controllers with External Rsense and High Gate Pulldown Current |
| MAX5939 | -48V Hot-Swap Controllers with External Rsense and High Gate Pulldown Current |
| MAX5921FESA | -48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Current |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5915AEUI | 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 |
| MAX5915AEUI+ | 功能描述:熱插拔功率分布 Dual PCI 2.2 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 |
| MAX5915AEUI+T | 功能描述:熱插拔功率分布 Dual PCI 2.2 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 |
| MAX5915AEUI-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 |
| MAX5915AUUI+ | 功能描述:熱插拔功率分布 Dual PCI 2.2 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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