- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98280 > TPS2551DBVR (TEXAS INSTRUMENTS INC) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 PDF資料下載
參數(shù)資料
| 型號： | TPS2551DBVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | GREEN, PLASTIC, SOT-23, 6 PIN |
| 文件頁數(shù)： | 14/32頁 |
| 文件大小： | 1402K |
| 代理商： | TPS2551DBVR |
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頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第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頁第32頁
AUTO-RETRY FUNCTIONALITY
OUT
IN
GND
FAULT
ILIM
EN
Input
TPS2551
PowerPad
Output
0.1 F
m
R
100k
FAULT
W
C
0.1 F
RETRY
m
R
20k
ILIM
W
CLOAD
RLOAD
1kW
OUT
IN
GND
FAULT
ILIM
EN
ExternalLogic
Signal&Driver
TPS2551
PowerPad
Input
0.1 F
m
R
100k
FAULT
W
C
0.1 F
RETRY
m
R
20k
ILIM
W
CLOAD
RLOAD
1kW
Output
LATCH-OFF FUNCTIONALITY
www.ti.com ........................................................................................................................................ SLVS736B – FEBRUARY 2008 – REVISED NOVEMBER 2008
Some applications require that an overcurrent condition disables the part momentarily during a fault condition
and re-enables after a pre-set time. This auto-retry functionality can be implemented with an external resistor and
capacitor. During a fault condition, FAULT pulls low disabling the part. The part is disabled when EN is pulled
low, and FAULT goes high impedance allowing CRETRY to begin charging. The part re-enables when the voltage
on EN reaches the turnon threshold, and the auto-retry time is determined by the resistor/capacitor time
constant. The part will continue to cycle in this manner until the fault condition is removed.
Figure 22. Auto-Retry Functionality
Some applications require auto-retry functionality and the ability to enable/disable with an external logic signal.
The figure below shows how an external logic signal can drive EN through RFAULT and maintain auto-retry
functionality. The resistor/capacitor time constant determines the auto-retry time-out period.
Figure 23. Auto-Retry Functionality With External EN Signal
The circuit in Figure 24 uses an SN74HC00 quad-NAND gate to implement overcurrent latch-off. The SN74HC00
high-speed CMOS logic gate is selected because it operates over the 2.5V – 6.5V range of the TPS2550/51.
This circuit is designed to work with the active-high TPS2551. ENABLE must be logic low during start-up until VIN
is stable to ensure that the switch initializes in the OFF state. A logic high on ENABLE turns on the switch after
VIN is stable. FAULT momentarily pulls low during an overcurrent condition, which latches STAT logic low and
disables the switch. The host can monitor STAT for an overcurrent condition. Toggling ENABLE resets STAT and
re-enables the switch.
Copyright 2008, Texas Instruments Incorporated
21
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS2554DRCT | POWER SUPPLY SUPPORT CKT, PDSO10 |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2551DBVRG4 | 功能描述:電源開關(guān) IC - USB Adj Crnt-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 |
| TPS2551DBVT | 功能描述:電源開關(guān) IC - USB Adj Crnt-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 |
| TPS2551DBVT | 制造商:Texas Instruments 功能描述:Adjustable Power-Distribution Switch 制造商:Texas Instruments 功能描述:IC PWR DIST SWITCH ADJ SOT23-6 制造商:Texas Instruments 功能描述:IC, PWR DIST SWITCH ADJ SOT23-6 制造商:Texas Instruments 功能描述:IC, PWR DIST SWITCH ADJ SOT23-6; Primary Input Voltage:6.5V; Output Current:1.1A; Voltage Regulator Case Style:SOT-23; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; SVHC:No SVHC (19-Dec-2012); Base ;RoHS Compliant: Yes |
| TPS2551DBVTG4 | 功能描述:電源開關(guān) IC - USB Adj Crnt-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 |
| TPS2551DRVEVM-271 | 功能描述:交換機 IC 開發(fā)工具 TPS2550DBVEVM-271 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。