- 您現(xiàn)在的位置：買賣IC網 > PDF目錄385011 > TPS2392DBT (Texas Instruments, Inc.) Utillity Helmet with Headband; RoHS Compliant: NA PDF資料下載
參數資料
| 型號： | TPS2392DBT |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Utillity Helmet with Headband; RoHS Compliant: NA |
| 中文描述： | 全功能- 48 - V熱風全系統(tǒng)電源管理器 |
| 文件頁數： | 21/31頁 |
| 文件大?。?/td> | 373K |
| 代理商： | TPS2392DBT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁
SLUS536C AUGUST 2002 REVISED AUGUST 2004
www.ti.com
21
APPLICATION INFORMATION
setting the fault timing capacitor
The fault timeout period is established by the value of the capacitor connected to the FLTTIME pin, C
FLT
. The
timeout period permits riding out spurious current glitches and surges that may occur during operation of the
system, and prevents indefinite sourcing into faulted loads swapped into a live system. However, to ensure
smooth voltage ramping under all conditions of load capacitance and input supply potential, the minimum
timeout should be set to accommodate these system variables. To do this, a rough estimate of the maximum
voltage ramp time for a completely discharged plug-in card provides a good basis for setting the minimum timer
delay.
Due to the three-phase nature of the load current at turn-on, the load voltage ramp has potentially three distinct
phases and is seen by comparing Figure 1 and Figure 2. This profile depends on the relative values of load
capacitance, input dc potential, maximum current limit and other factors. The first two phases are characterized
by the two different slopes of the current ramp; the third phase, if required to complete load charging, is the
constant-current charging at IMAX. Considering the two current ramp phases to be one period at an average
di/dt simplifies calculation of the required timing capacitor.
For the TPS2392 and TPS2393, the typical duration of the soft-start ramp period, t
SS
, is given by equation (3).
t
SS
1183
C
IRAMP
where:
t
SS
is the soft-start period in milliseconds, and
C
IRAMP
is given in
μ
F
During this current ramp period, the load voltage magnitude which is attained is estimated by equation (4).
V
LSS
i
AVG
2
C
L
C
IRAMP
100
R
SENSE
t
SS
2
where:
V
LSS
is the load voltage reached during soft-start
i
AVG
is 3.38
μ
A for the TPS2392 and TPS2393
C
L
is the amount of the load capacitance
t
SS
is the softstart period, in seconds
The quantity i
AVG
in equation (4) is a weighted average of the two charge currents applied to C
IRAMP
during
turn-on, considering the typical output values.
If the result of equation (4) is larger than the maximum input supply value, then the load can be expected to
charge completely during the inrush slewing portion of the insertion event. However, if this voltage is less than
the maximum supply input, V
IN(max)
, the HSPM transitions to the constant-current charging of the load. The
remaining amount of time required at IMAX is determined from equation (5).
t
CC
C
L
V
IN(max)
V
LSS
V
REF_K(min)
R
SENSE
where:
t
CC
is the constant-current voltage ramp time, in seconds
V
REF_K(min)
is the minimum clamp voltage, 33 mV.
(3)
(4)
(5)
相關PDF資料 |
PDF描述 |
|---|---|
| TPS2393DBTR | CLOTH ROLL, 25MX25MM, P240; Grit size:P240; Length:25m; Width, external:25mm RoHS Compliant: NA |
| TPS2534 | Dual Channel Thermopile |
| TPS2848PWPR | 30V N-Channel PowerTrench MOSFET |
| TPS2849PWPR | 30V N-Channel PowerTrench MOSFET |
| TPS2839PWPR | 30V N-Channel PowerTrench MOSFET |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2392EVM | 功能描述:電源管理IC開發(fā)工具 Simple -48V Hot Swap Contr EVM 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 |
| TPS2392PW | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. 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 |
| TPS2392PWG4 | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. 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 |
| TPS2392PWR | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. 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 |
| TPS2392PWRG4 | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。