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參數資料
| 型號： | MAX5916AEUI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Dual PCI 2.2 Hot-Swap Controllers |
| 中文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO28 |
| 封裝： | 4.40 MM, M0-153AE, TSSOP-28 |
| 文件頁數： | 16/25頁 |
| 文件大?。?/td> | 579K |
| 代理商： | MAX5916AEUI |
M
Applications Information
Component Selection
External MOSFETs
Select the external n-channel MOSFETs according to
the application
’
s 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 MOSFET
’
s
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5916AEUI+ | 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 |
| MAX5916AEUI+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 |
| MAX5916AEUI-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品: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 |
| MAX5916AUUI+ | 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 |
| MAX5916AUUI+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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