參數(shù)資料
型號(hào)： TPS2066DRG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 8/40頁(yè)
文件大?。?/td> 1325K
代理商： TPS2066DRG4
IN
OC1
EN1
OC2
2
8
5
7
0.1
F
22
F
0.1
F
22
F
Load
OUT1
OUT2
Power Supply
2.7 V to 5.5 V
6
EN2
3
4
GND
0.1
F
TPS2062
1
SLVS490I – DECEMBER 2003 – REVISED OCTOBER 2009
www.ti.com
APPLICATION INFORMATION
POWER-SUPPLY CONSIDERATIONS
Figure 25. Typical Application
A 0.01-
μF to 0.1-μF ceramic bypass capacitor between IN and GND, close to the device, is recommended.
Placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy.
This precaution reduces power-supply transients that may cause ringing on the input. Additionally, bypassing the
output with a 0.01-
μF to 0.1-μF ceramic capacitor improves the immunity of the device to short-circuit transients.
OVERCURRENT
A sense FET is employed to check for overcurrent conditions. Unlike current-sense resistors, sense FETs do not
increase the series resistance of the current path. When an overcurrent condition is detected, the device
maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only
if the fault is present long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted before the
device is enabled or before VI(IN) has been applied (see Figure 15). The TPS206x senses the short and
immediately switches into a constant-current output.
In the second condition, a short or an overload occurs while the device is enabled. At the instant the overload
occurs, high currents may flow for a short period of time before the current-limit circuit can react. After the
current-limit circuit has tripped (reached the overcurrent trip threshold), the device switches into constant-current
mode.
In the third condition, the load has been gradually increased beyond the recommended operating current. The
current is permitted to rise until the current-limit threshold is reached or until the thermal limit of the device is
exceeded (see Figure 18). The TPS206x is capable of delivering current up to the current-limit threshold without
damaging the device. Once the threshold has been reached, the device switches into its constant-current mode.
OC RESPONSE
The OCx open-drain output is asserted (active low) when an overcurrent or overtemperature shutdown condition
is encountered after a 10-ms deglitch timeout. The output remains asserted until the overcurrent or
overtemperature condition is removed. Connecting a heavy capacitive load to an enabled device can cause a
momentary overcurrent condition; however, no false reporting on OCx occurs due to the 10-ms deglitch circuit.
The TPS206x is designed to eliminate false overcurrent reporting. The internal overcurrent deglitch eliminates
the need for external components to remove unwanted pulses. OCx is not deglitched when the switch is turned
off due to an overtemperature shutdown.
16
Copyright 2003–2009, Texas Instruments Incorporated
相關(guān)PDF資料
PDF描述
TPS2062DG4 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2061DGNR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2061DBVT 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
TPS2066ID 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2067D 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2066EVM-293 功能描述:交換機(jī) IC 開(kāi)發(fā)工具 TPS2066EVM-293 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:USB Power Switches 工具用于評(píng)估:MAX4984E 工作電源電壓:2.8 V to 5.5 V
TPS2066EVM-296 功能描述:交換機(jī) IC 開(kāi)發(fā)工具 TPS2066EVM-296 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:USB Power Switches 工具用于評(píng)估:MAX4984E 工作電源電壓:2.8 V to 5.5 V
TPS2066ID 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES
TPS2066IDR 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES
TPS2066-Q1 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCH
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*