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參數資料
| 型號： | TPS24701DGK |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數： | 27/29頁 |
| 文件大小： | 1956K |
| 代理商： | TPS24701DGK |
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T
FLT
10 A
C =
t
1.35 V
SLVSAL3B
– MARCH 2011 – REVISED MAY 2011
A fast-trip shutdown occurs when V(VCC–VSENSE) exceeds 60 mV.
TIMER: A capacitor CT connected from the TIMER pin to GND determines the overload fault timing. TIMER
sources 10
μA when an overload is present, and discharges CT at 10 μA otherwise. M1 is turned off when VTIMER
reaches 1.35 V. In an application implementing auto-retry after a fault, this capacitor also determines the period
before the external MOSFET is re-enabled. A minimum timing capacitance of 1 nF is recommended to ensure
proper operation of the fault timer. The value of CT can be calculated from the desired fault time tFLT, using
(2)
The latch mode (TPS24700) or the retry mode (TPS24701) occurs if the load current exceeds the current limit
threshold or the fast-trip shutdown threshold. While in latch mode, the TIMER pin continues to charge and
discharge the attached capacitor periodically. In retry mode, the external MOSFET is disabled for sixteen cycles
of TIMER charging and discharging. The TIMER pin is pulled to GND by a 2-mA current source at the end of the
16th cycle of charging and discharging. The external MOSFET is then re-enabled. The TIMER pin capacitor, CT,
can also be discharged to GND during latch mode or retry mode by a 2-mA current source whenever any of the
following occurs:
VEN is below its falling threshold.
VVCC drops below the UVLO threshold.
VCC: This pin performs three functions. First, it provides biasing power to the integrated circuit. Second, it serves
as an input to the power-on reset (POR) and undervoltage lockout (UVLO) functions. The VCC trace from the
integrated circuit should connect directly to the positive terminal of RSENSE to minimize the voltage sensing error.
Bypass capacitor C1, shown in the typical application diagram on the front page, should be connected to the
positive terminal of RSENSE. A capacitance of at least 10 nF is recommended.
Copyright
2011, Texas Instruments Incorporated
7
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相關代理商/技術參數 |
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| TPS24701DGKR | 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 |
| TPS24701EVM-002 | 功能描述:電源管理IC開發工具 TPS24701 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS24710DGS | 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 |
| TPS24710DGSR | 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 |
| TPS24710EVM-003 | 功能描述:電源管理IC開發工具 TPS24710 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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