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參數資料
| 型號： | TPS2391DGKRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數： | 7/20頁 |
| 文件大?。?/td> | 497K |
| 代理商： | TPS2391DGKRG4 |
TPS2390
TPS2391
SLUS471D JUNE 2002 REVISED JANUARY 2008
15
www.ti.com
APPLICATION INFORMATION
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, VIN(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) * VLSS
V
REF_K (min)
R
SENSE
where:
t
CC is the constant-current voltage ramp time, in seconds, and
V
REF_K(min) is the minimum clamp voltage, 33 mV.
With this information, the minimum recommended value timing capacitor CFLT can be determined. The delay
time needed is either tSS or the sum of tSS and tCC, according to the estimated time to charge the load. Since
fault timing is generated by the constant-current charging of CFLT, the capacitor value is determined by equation
(6) or (7).
C
FLT
(MIN)
+
55
t
SS
3.75
C
FLT
(MIN)
+
55
t
SS )
t
CC
3.75
where:
C
FLT(min) is the recommended capacitor value, in microfarads,
t
SS is the result of equation (3), in seconds, and
t
CC is the result of equation (5), in seconds.
For the typical application example, with the 100-
F filter capacitor in front of the dc-to-dc converter, equations
(3) and (4) estimate the load voltage ramping to 46 V during the soft-start period. If the module should operate
down to 72-V input supply, approximately another 1.58 ms of constant-current charging may be required.
Therefore, equation 7 is used to determine CFLT(min), and the result is approximately 0.1 F.
(5)
(6)
(7)
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相關代理商/技術參數 |
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| TPS2391EVM | 功能描述:電源管理IC開發工具 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 |
| TPS2392EVM | 功能描述:電源管理IC開發工具 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 |
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