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参数资料
| 型号： | TPS24713DGSR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 8/34页 |
| 文件大小： | 2148K |
| 代理商： | TPS24713DGSR |
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C002
I_IN:InputCurrent,2 A/div
GAT:VoltageonGATEPin,5V/div
V_DS:Drain-to-SourceVoltageofM1,5V/div
TIMER:Voltageon TIMERPin,500mV/div
FET_PWR:PoweronM1(productofV_DSandI_IN),19W/div
Time:10ms/div
SLVSAL2C
– JANUARY 2011 – REVISED MAY 2011
Figure 27. Computation of M1 Power Stress During Start-Up
CIRCUIT BREAKER AND FAST TRIP
The TPS24710/11/12/13 monitors load current by sensing the voltage across RSENSE. 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 RSENSE 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
μA begins to charge timing capacitor
CT. If the voltage on CT 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 RSENSE 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 M1. 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
Copyright
2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS24720EVM-001 | 功能描述:电源管理IC开发工具 TPS24720 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS24720RGTR | 功能描述:热插拔功率分布 2.5-18V Hi Eff Adj Ltd Hot-Swap Cntrlr RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS24720RGTT | 功能描述:热插拔功率分布 2.5-18V Hi Eff Adj Ltd Hot-Swap Cntrlr RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS24740EVM-596 | 功能描述:IC CTRLR HOT SWAP 2.5-18V 16QFN 制造商:texas instruments 系列:- 零件状态:在售 主要用途:电源管理，热交换控制器 嵌入式:- 使用的 IC/零件:TPS24740 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| TPS24740RGET | 功能描述:Hot Swap Controller, OR Controller 1 Channel General Purpose 24-VQFN (4x4) 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 类型:热交换控制器，OR 控制器 通道数:1 内部开关:无 应用:通用 特性:闭锁故障，UVLO 可编程特性:限流，故障超时，OVP，开启电压 电压 - 电源:2.5 V ~ 18 V 电流 - 输出（最大值）:- 工作温度:-40°C ~ 125°C 电流 - 电源:4.2mA 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商器件封装:24-VQFN（4x4） 功能引脚:ENHS，ENOR，FLTb，FSTP，IMON，IMONBUF，OV，PGHS，PLIM，RVSNP，RVSNM，SENM，SET，STAT，TFLT，TINR 标准包装:1 |
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