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參數(shù)資料
| 型號： | TPS24711DGSR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 16/34頁 |
| 文件大?。?/td> | 2792K |
| 描述： | IC CTRLR HOT SWAP 2.5-18V 10MSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電流限制： | 可調(diào) |
| 電源電壓： | 2.5 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | 296-28562-6 |
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_IN:InputCurrent,2 A/div
AT:VoltageonGATEPin,5V/div
_DS:Drain-to-SourceVoltageofM1,5V/div
IMER:Voltageon TIMERPin,500mV/div
ET_PWR:PoweronM1(productofV_DSandI_IN),19W/div
ime:10ms/div
TPS24710,TPS24711
TPS24712,TPS24713
SLVSAL2E JANUARY 2011REVISED NOVEMBER 2013
www.ti.com
dissipated within the MOSFET, labeled FET PWR, remaining substantially constant during this period of
operation, which ends when the current through the MOSFET reaches the current limit I
LIM
. This behavior can be
considered a form of foldback limiting, but unlike the standard linear form of foldback limiting, it allows the power
device to operate near its maximum capability, thus reducing the start-up time and minimizing the size of the
required MOSFET.
Figure 27. Computation of M
1
Power Stress During Start-Up
CIRCUIT BREAKER AND FAST TRIP
The TPS24710/11/12/13 monitors load current by sensing the voltage across R
SENSE
. The TPS24710/11/12/13
incorporates two distinct thresholds: a current-limit threshold and a fast-trip threshold.
The functions of circuit breaker and fast-trip turn off are shown in Figure 28 through Figure 31.
Figure 28 shows the behavior of the TPS24710/11 when a fault in the output load causes the current passing
through R
SENSE
to increase to a value above the current limit but less than the fast-trip threshold. When the
current exceeds the current-limit threshold, a current of approximately 10 糀 begins to charge timing capacitor
C
T
. If the voltage on C
T
reaches 1.35 V, then the external MOSFET is turned off. The TPS24710 latches off and
the TPS24711 commences a restart cycle. In either event, fault pin FLTb pulls low to signal a fault condition.
Overload between the current limit and the fast trip threshold is permitted for this period. This shutdown scheme
is sometimes called an electronic circuit breaker.
The fast-trip threshold protects the system against a severe overload or a dead short circuit. When the voltage
across the sense resistor R
SENSE
exceeds the 60 mV fast-trip threshold, the GATE pin immediately pulls the
external MOSFET gate to ground with approximately 1 A of current. This extremely rapid shutdown may
generate disruptive transients in the system, in which case a low-value resistor inserted between the GATE pin
and the MOSFET gate can be used to moderate the turn off current. The fast-trip circuit holds the MOSFET off
for only a few microseconds, after which the TPS24710/11/12/13 turns back on slowly, allowing the current-limit
feedback loop to take over the gate control of M
1
. Then the hot-swap circuit goes into either latch mode
(TPS24710/12) or auto-retry mode (TPS24711/13). Figure 30 and Figure 31 illustrate the behavior of the system
implementing TPS24710/11 when the current exceeds the fast-trip threshold.
16
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Copyright ?20112013, Texas Instruments Incorporated
Product Folder Links: TPS24710 TPS24711 TPS24712 TPS24713
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參數(shù)描述 |
|---|---|
| TPS24711EVM-004 | 功能描述:電源管理IC開發(fā)工具 TPS24711 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS24712DGS | 功能描述:熱插拔功率分布 2.5-18V Hi Eff Pwr- Ltd Hot-Swap Cntrlr 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 |
| TPS24712DGSR | 功能描述:熱插拔功率分布 2.5-18V Hi Eff Pwr- Ltd Hot-Swap Cntrlr 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 |
| TPS24713DGS | 功能描述:熱插拔功率分布 2.5-18V Hi Eff 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 |
| TPS24713DGSR | 功能描述:熱插拔功率分布 2.5-18V Hi Eff 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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