- 您現在的位置：買賣IC網 > PDF目錄98280 > TPS2554DRCT (TEXAS INSTRUMENTS INC) POWER SUPPLY SUPPORT CKT, PDSO10 PDF資料下載
參數資料
| 型號： | TPS2554DRCT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | PLASTIC, SON-10 |
| 文件頁數： | 5/23頁 |
| 文件大小： | 1035K |
| 代理商： | TPS2554DRCT |
SHORT
ILIMx
48000
I
R
=
SHORT _ min
1.037
ILIMx
48000
I
R
=
SHORT _ max
0.962
ILIMx
48000
I
R
=
SLVSAM0
– JUNE 2011
APPLICATION INFORMATION
Input and Output Capacitance
Capacitance added to the input and output of the TPS2554/55 improves the performance of the device; the
actual capacitance should be optimized for the particular application. For all applications, a 100 nF or greater
ceramic bypass capacitor between IN and GND is recommended as close to the device as possible for local
noise decoupling. This precaution reduces ringing on the input due to power-supply transients. Additional input
capacitance may be needed on the input to prevent voltage overshoot from exceeding the absolute-maximum
voltage of the device during heavy transient conditions. This is especially important during bench testing when
long, inductive cables are used to connect the evaluation board to the bench power supply.
Output capacitance is not required for proper operation of the TPS2554/55, but placing a high-value electrolytic
capacitor on the output pin is recommended when large transient currents are expected on the output.
Programming the Current-Limit Threshold
Two overcurrent thresholds are user-programmable via two external resistors. The recommended 1% resistor
range for RILIMx is 16.9 k ≤ RILIM ≤ 750 k to ensure stability of the internal regulation loop. Best accuracy is
obtained with RILIMx values less than 210 kΩ. Many applications require that the minimum current limit is above a
certain current level or that the maximum current limit is below a certain current level, so it is important to
consider the tolerance of the overcurrent threshold when selecting a value for RILIMx. The following equations
approximate the resulting overcurrent threshold for a given external resistor value, RILIMx. Consult the Electrical
Characteristics table for specific current-limit settings. Printed-circuit-board traces routing the RILIMx resistor to the
TPS2554/55 should be as short as possible to reduce parasitic effects on the current-limit accuracy.
The equations and the graph below can be used to estimate the minimum and maximum variation of the
current-limit threshold for a predefined resistor value. This variation is an approximation only and does not take
into account, for example, the resistor tolerance. For examples of more-precise variation of ISHORT refer to the
current-limit section of the Electrical Characteristics table.
(2)
(3)
(4)
ISHORT = Current-limit threshold, mA
RILIM = Resistance at ILIMx pin, kΩ
Copyright
2011, Texas Instruments Incorporated
13
相關PDF資料 |
PDF描述 |
|---|---|
| TPS2557DRBT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| TPS2557DRB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| TPS2561DRC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| TPS2561DRCT | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| TPS3305-20QDRQ1 | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2554EVM-010 | 功能描述:交換機 IC 開發工具 TPS2554 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:USB Power Switches 工具用于評估:MAX4984E 工作電源電壓:2.8 V to 5.5 V |
| TPS2555DRCR | 功能描述:電源開關 IC - USB Prec Adj,Current-Ltd Pwr Dist Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2555DRCT | 功能描述:電源開關 IC - USB Prec Adj,Current-Ltd Pwr Dist Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2556DRBEVM-423 | 功能描述:交換機 IC 開發工具 Eval Mod for TPS2556 RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:USB Power Switches 工具用于評估:MAX4984E 工作電源電壓:2.8 V to 5.5 V |
| TPS2556DRBR | 功能描述:電源開關 IC - USB Prec Adj Current-Ltd Pwr-Dist Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
發布緊急采購，3分鐘左右您將得到回復。