參數(shù)資料
型號(hào)： TPS2330D
廠商： Texas Instruments, Inc.
英文描述： SINGLE HOT SWAP POWER CONTROLLER WITH CIRCUIT BREAKER AND POWER-GOOD REPORTING
中文描述： 單熱插拔功率斷路器及功率控制器，高質(zhì)量的報(bào)告
文件頁(yè)數(shù)： 16/20頁(yè)
文件大?。?/td> 345K
代理商： TPS2330D
TPS2330, TPS2331
SINGLE HOT SWAP POWER CONTROLLER WITH
CIRCUIT BREAKER AND POWER-GOOD REPORTING
SLVS277A – MARCH 2000– REVISED APRIL 2000
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
setting the power-good threshold voltage
The two feedback resistors R
VSENSE_TOP
and R
VSENSE_BOT
connected between V
O
and ground form a
resistor divider setting the voltage at the VSENSE pins. VSENSE voltage equals to
V
I(SENSE)
= V
O
×
R
VSENSE_BOT
/(R
VSENSE_TOP
+ R
VSENSE_BOT
)
This voltage is compared to an internal voltage reference (1.225 V
±
2%) to determine whether the output voltage
level is within a specified tolerance. For example, given a nominal output voltage at V
O
, and defining V
O_min
as the minimum required output voltage, then the feedback resistors are defined by:
R
VSENSE_TOP
V
O_min
1.225
1.225
R
VSENSE_BOT
Start the process by selecting a large standard resistor value for R
VSENSE_BOT
to reduce power loss. Then
R
VSENSE_TOP
can be calculated by inserting all of the known values into the equation above. When V
O
is lower
than V
O_min
, PWRGD will be low as long as the controller is enabled.
undervoltage lockout (UVLO)
The TPS2330/TPS2331 includes an undervoltage lockout (UVLO) feature that monitors the voltage present on
the VREG pin. This feature will disable the external MOSFET if the voltage on VREG drops below 2.78 V
(nominal) and will re-enable normal operation when it rises above 2.85 V (nominal). Since VREG is fed from
IN through a low-dropout voltage regulator, the voltage on VREG will track the voltage on IN within 50 mV. While
the undervoltage lockout is engaged, GATE is held low by an internal PMOS pulldown transistor, ensuring that
the external MOSFET transistor remain off at the times, even if the power supply has fallen to 0 V.
power-up control
The TPS2330/TPS2331 includes a 500
μ
s (nominal) startup delay that ensures that internal circuitry has
sufficient time to start before the device begins turning on the external MOSFETs. This delay is triggered only
upon the rapid application of power to the circuit. If the power supply ramps up slowly, the undervoltage lockout
circuitry will provide adequate protection against undervoltage operation.
3-channel hot-swap application
Some applications require hot-swap control of up to three voltage rails, but may not explicitly require the sensing
of the status of the output power on all three of the voltage rails. One such application is device bay, where dv/dt
control of 3.3 V, 5 V, and 12 V is required. By using TPS2330/TPS2331 to drive all three power rails, as is shown
below, TPS2330/31 can deliver three different voltages to three loads while monitoring the status of one of the
loads.
相關(guān)PDF資料
PDF描述
TPS2330PW SINGLE HOT SWAP POWER CONTROLLER WITH CIRCUIT BREAKER AND POWER-GOOD REPORTING
TPS2331D SINGLE HOT SWAP POWER CONTROLLER WITH CIRCUIT BREAKER AND POWER-GOOD REPORTING
TPS2331PW SINGLE HOT SWAP POWER CONTROLLER WITH CIRCUIT BREAKER AND POWER-GOOD REPORTING
TPS2330EVM-184 TPS2330 48-V Telecom Hot Swap Evaluation Module and Interface Card(48V遠(yuǎn)程通信熱交換電源控制器TPS2330的評(píng)估板與接口卡)
TPS2330EVM-185 TPS2330/TPS2331,TPS5102 InfiniBand SM Bulk Power Evalutation Module and Interface Card( InfiniBand SM 降壓電源管理器件TPS2330/TPS2331, TPS5102的評(píng)估板與接口卡)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2330EVM-184 功能描述:電源管理IC開發(fā)工具 TPS2330 48-V Telecom Hot Swap Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2330EVM-185 功能描述:電源管理IC開發(fā)工具 Infiniband Bulk Pow Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2330ID 功能描述:熱插拔功率分布 3-13V Sngl w/Pwr Gd Rpt Act-Lo Enable 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
TPS2330IDG4 功能描述:熱插拔功率分布 3-13V Sngl w/Pwr Gd Rpt Act-Lo Enable 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
TPS2330IDR 功能描述:熱插拔功率分布 3-13V Sngl w/Pwr Gd Rpt Act-Lo Enable 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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