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參數(shù)資料
| 型號： | TPS2340A |
| 英文描述： | Dual Slot PCI and PCIX 1.0 Hot-Plug Power Controller |
| 中文描述： | 雙槽PCI與PCIx 1.0熱插拔電源控制器 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 411K |
| 代理商： | TPS2340A |
TPS2330, TPS2331
SINGLE HOT SWAP POWER CONTROLLER WITH
CIRCUIT BREAKER AND POWER-GOOD REPORTING
SLVS277A – MARCH 2000– REVISED APRIL 2000
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
gate drive circuitry
The TPS2330/TPS2331 includes four separate features associated with each gate-drive terminal:
A charging current of approximately 15
μ
A is applied to enable the external MOSFET transistor. This current
is generated by an internal charge pump that can develop a gate-to-source potential (referenced to DISCH)
of 9 V–12 V. DISCH must be connected to the external MOSFET source terminal to ensure proper operation
of this circuitry.
A discharge current of approximately 75
μ
A is applied to disable the external MOSFET transistor. Once the
transistor gate voltage has dropped below approximately 1.5 V, this current is disabled and the UVLO
discharge driver is enabled instead. This feature allows the part to enter a low-current shutdown mode while
ensuring that the gate of the external MOSFET transistor remain at a low voltage.
During a UVLO condition, the gate of the MOSFET transistor is pulled down by an internal PMOS transistor.
This transistor continues to operate even if the voltage at IN is 0 V. This circuitry also helps hold the external
MOSFET transistor off when power is suddenly applied to the system.
During an overcurrent fault condition, the external MOSFET transistor that exhibited an over-current
condition will be rapidly turned off by an internal pulldown circuit capable of pulling in excess of 400 mA (at
4 V) from the pin. Once the gate has been pulled below approximately 1.5 V, this driver is disengaged and
the UVLO driver is enabled instead.
setting the current-limit circuit-breaker threshold
The current sensing resistor R
ISENSE
and the current limit setting resistor R
ISET
determine the current limit of
the channel, and can be calculated by the following equation:
I
LMT
R
ISET
50
10
–6
R
ISENSE
Typically R
ISENSE
is usually very small (0.001
to 0.1
). If the trace and solder-junction resistances between
the unction of R
ISENSE
and ISENSE and the unction of R
ISENSE
and R
ISET
are greater than 10% of the R
ISENSE
value, then these resistance values should be added to the R
ISENSE
value used in the calculation above.
Table 2 shows some of the current sense resistors available in the market.
Table 2. Some Current Sense Resistors
CURRENT RANGE
(A)
PART NUMBER
DESCRIPTION
MANUFACTURER
0 to 1
WSL-1206, 0.05 1%
0.05
, 0.25 W, 1% resistor
0.025
, 0.25 W, 1% resistor
0.015
, 0.25 W, 1% resistor
0.010
, 0.5 W, 1% resistor
0.007
, 0.5 W, 1% resistor
0.005
, 0.5 W, 1% resistor
1 to 2
WSL-1206, 0.025 1%
2 to 4
WSL-1206, 0.015 1%
Vishay Dale
4 to 6
WSL-2010, 0.010 1%
6 to 8
8 to 10
WSL-2010, 0.007 1%
WSR-2, 0.005 1%
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| TPS2340APFP | 功能描述:熱插拔功率分布 Dual Slot PCI & PCIX 1.0 Hot-Plug 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 |
| TPS2340APFPG4 | 功能描述:熱插拔功率分布 Dual Slot PCI & PCIX 1.0 Hot-Plug 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 |
| TPS2340APFPR | 功能描述:熱插拔功率分布 Dual Slot PCI & PCIX 1.0 Hot-Plug 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 |
| TPS2340APFPRG4 | 功能描述:熱插拔功率分布 Dual Slot PCI & PCIX 1.0 Hot-Plug 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 |
| TPS2341PHP | 功能描述:IC DUAL SLT PCI PWR CTLR 48HTQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
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