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参数资料
| 型号： | TPS2390DGKG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, MSOP-8 |
| 文件页数： | 3/20页 |
| 文件大小： | 497K |
| 代理商： | TPS2390DGKG4 |
TPS2390
TPS2391
SLUS471D JUNE 2002 REVISED JANUARY 2008
11
www.ti.com
APPLICATION INFORMATION
UDG02091
+
40mV
30 V
99
R
+
SQ
Q
R
FAULT
LOGIC
100mV
SLOW
0.5V
4V
LCA
1.4V
VDD
50
A
ON
TIMER
BLOCK
’91 ONLY
RAMP
CONTROL
EN_A
OC
OVERLOAD
COMP
4
8
2
5
3
1
6
7GATE
ISENS
FAULT
FLTTIME
IRAMP
RTN
EN
VIN
DCHG
RETRY
ON
14V
VDD
10
A
600 nA
0.4
A
OL
ON
Figure 17. Block Diagram
Fault timing is accomplished by connecting a capacitor between the FLTTIME and VIN pins, allowing
user-programming of the timeout period. Whenever the hot swap controller is in current control mode as
described above, the LCA asserts an overcurrent indication (OC in the Figure 17 diagram). Overcurrent fault
timing is inhibited during the slow turn-on portion of the IRAMP waveform. However, once the device transitions
to the normal rate current ramp (VO(IRAMP) ≥ 0.5 V), the external capacitor is charged by a 50-A source,
generating a voltage ramp at the FLTTIME pin. If this voltage reaches the 4-V fault threshold, the fault is latched,
and the open-drain driver is turned on to assert the external FAULT output. Fault capacitor charging ceases,
and the capacitor is now discharged. In addition, latching of a fault condition causes rapid discharge of the
IRAMP capacitor. In this manner, the soft-start function is now reset and ready for the next output enable, if and
when conditions permit.
The TPS2390 latches off in response to faults; once a fault timeout occurs, the discharge signal (DCHG) turns
on a large NMOS device to rapidly discharge the external capacitor, resetting the timer for any subsequent
device reset. The TPS2390 can only be reset by cycling power to the device, or by cycling the EN input.
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相关代理商/技术参数 |
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|---|---|
| TPS2390DGKR | 功能描述:热插拔功率分布 Simple-48V 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 |
| TPS2390DGKRG4 | 功能描述:热插拔功率分布 Simple-48V 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 |
| TPS2390EVM | 功能描述:电源管理IC开发工具 Simple -48V Hot Swap Contr EVM 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 |
| TPS2391DGK | 功能描述:热插拔功率分布 Simple-48V 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 |
| TPS2391DGKG4 | 功能描述:热插拔功率分布 Simple-48V 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 |
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