- 您现在的位置：买卖IC网 > PDF目录98280 > TPS24711 (TEXAS INSTRUMENTS INC) POWER SUPPLY SUPPORT CKT, PDSO10 PDF资料下载
参数资料
| 型号： | TPS24711 |
| 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： | 14/34页 |
| 文件大小： | 2148K |
| 代理商： | TPS24711 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
SLVSAL2C
– JANUARY 2011 – REVISED MAY 2011
1. In the inrush mode, TIMER begins to source current to the timer capacitor, CT, when MOSFET M1 is
enabled. TIMER begins to sink current from the timer capacitor, CT when V(GATE – VCC) exceeds the timer
activation voltage (see the Inrush Operation section). If V(GATE – VCC) does not reach the timer activation
voltage before TIMER reaches 1.35 V, then the TPS24710/11/12/13 disables the external MOSFET M1. After
the MOSFET turns off, the timer goes into either latch mode (TPS24710/12) or retry mode (TPS24711/13).
2. In an overload fault, TIMER begins to source current to the timer capacitor, CT, when the load current
exceeds the programmed current limits. When the timer capacitor voltage reaches its upper threshold of
1.35 V, TIMER begins to sink current from the timer capacitor, CT, and the GATE pin is pulled to ground.
After the fault timer period, TIMER may go into latch mode (TPS24710/12) or retry mode (TPS24711/13).
3. In output short-circuit fault, TIMER begins to source current to the timer capacitor, CT, when the load current
exceeds the programmed current limits following a fast-trip shutdown of M1. When the timer capacitor voltage
reaches its upper threshold of 1.35 V, TIMER begins to sink current from the timer capacitor, CT, and the
GATE pin is pulled to ground. After the fault timer period, TIMER may go into latch mode (TPS24710/12) or
retry mode (TPS24711/13).
If the fault current drops below the programmed current limit within the fault timer period, VTIMER decreases and
the pass MOSFET remains enabled.
The behaviors of TIMER are different in the latch mode (TPS24710/12) and retry mode (TPS24711/13). If the
timer capacitor reaches the upper threshold of 1.35 V, then:
In latch mode, the GATE remains low and the TIMER pin continues to charge and discharge the attached
capacitor periodically until TPS24710/12 is disabled by UVLO or EN as shown in Figure 33.
In retry mode, TIMER charges and discharges CT between the lower threshold of 0.35 V and the upper
threshold of 1.35 V for sixteen cycles before the TPS24711/13 attempts to re-start. The TIMER pin is pulled
to GND at the end of the 16th cycle of charging and discharging and then ramps from 0 V to 1.35 V for the
initial half-cycle in which the GATE pin sources current. This periodic pattern is stopped once the overload
fault is removed or the TPS24711/13 is disabled by UVLO or EN.
OVERTEMPERATURE SHUTDOWN
The TPS24710/11/12/13 includes a built-in overtemperature shutdown circuit designed to disable the gate driver
if the die temperature exceeds approximately 140
°C. An overtemperature condition also causes the FLT, PG,
FLTb and PGb pins to go to high-impedance states. Normal operation resumes once the die temperature has
fallen approximately 10
°C.
START-UP OF HOT-SWAP CIRCUIT BY VCC OR EN
The connection and disconnection between a load and the system bus are controlled by turning on and turning
off the MOSFET, M1.
The TPS24710/11/12/13 has two ways to turn on MOSFET M1:
1. Increasing VVCC above UVLO upper threshold while EN is already higher than its upper threshold sources
current to the GATE pin. After an inrush period, TPS24710/11/12/13 fully turns on MOSFET M1.
2. Increasing EN above its upper threshold while VVCC is already higher than UVLO upper threshold sources
current to the GATE pin. After an inrush period, TPS24710/11/12/13 fully turns on MOSFET M1.
The EN pin can be used to start up the TPS24710/11/12/13 at a selected input voltage VVCC.
To isolate the load from the system bus, the GATE pin sinks current and pulls the gate of MOSFET M1 low. The
MOSFET can be disabled by any of the following conditions: UVLO, EN, load current above current limit
threshold, hard short at load, or OTSD. Three separate conditions pull down the GATE pin:
1. GATE is pulled down by an 11-mA current source when any of the following occurs.
– The fault timer expires during an overload current fault (VSENSE > 25 mV).
– VEN is below its falling threshold.
– VVCC drops below the UVLO threshold.
2. GATE is pulled down by a 1-A current source for 13.5
s when a hard output short circuit occurs and V(VCC –
SENSE) is greater than 60 mV, i.e., the fast-trip shutdown threshold. After fast-trip shutdown is complete, an
11-mA sustaining current ensures that the external MOSFET remains off.
3. GATE is discharged by a 20-k
resistor to GND if the chip die temperature exceeds the OTSD rising
Copyright
2011, Texas Instruments Incorporated
21
相关PDF资料 |
PDF描述 |
|---|---|
| TPS24711DGSR | POWER SUPPLY SUPPORT CKT, PDSO10 |
| TPS2481PW | POWER SUPPLY SUPPORT CKT, PDSO20 |
| TPS2480PW | POWER SUPPLY SUPPORT CKT, PDSO20 |
| TPS2490DGSRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| TPS2490DGSR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS24711DGS | 功能描述:热插拔功率分布 2.5-18V Hi Eff Hot- Swap Controller 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 |
| TPS24711DGSR | 功能描述:热插拔功率分布 2.5-18V Hi Eff Hot- Swap Controller 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 |
| TPS24711EVM-004 | 功能描述:电源管理IC开发工具 TPS24711 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 |
| TPS24712DGS | 功能描述:热插拔功率分布 2.5-18V Hi Eff Pwr- 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 |
| TPS24712DGSR | 功能描述:热插拔功率分布 2.5-18V Hi Eff Pwr- 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 |
发布紧急采购，3分钟左右您将得到回复。