參數(shù)資料
型號(hào)： TPS2071
英文描述： Pwr Controller for Bus/Self Pwrd Hub w/ 5V LDO Control. 3.3V LDO. 8 pwr switches Act-Hi BPMode Ind
中文描述： 壓水堆控制器總線/自Pwrd集線器瓦特/ 5V的穩(wěn)壓器控制。 3.3V的穩(wěn)壓器。 8壓水堆開(kāi)關(guān)法，喜BPMode工業(yè)
文件頁(yè)數(shù)： 3/22頁(yè)
文件大小： 356K
代理商： TPS2071
TPS2010A, TPS2011A, TPS2012A, TPS2013A
POWER-DISTRIBUTION SWITCHES
SLVS189A – DECEMBER 1998 – REVISED NOVEMBER 1999
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description
power switch
The power switch is an N-channel MOSFET with a maximum on-state resistance of 50 m
(V
I(IN)
= 5 V).
Configured as a high-side switch, the power switch prevents current flow from OUT to IN and IN to OUT when
disabled.
charge pump
An internal charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate
of the MOSFET above the source. The charge pump operates from input voltages as low as 2.7 V and requires
very little supply current.
driver
The driver controls the gate voltage of the power switch. To limit large current surges and reduce the associated
electromagnetic interference (EMI) produced, the driver incorporates circuitry that controls the rise times and
fall times of the output voltage. The rise and fall times are typically in the 2-ms to 9-ms range.
enable (EN)
The logic enable disables the power switch, the bias for the charge pump, driver, and other circuitry to reduce
the supply current to less than 10
μ
A when a logic high is present on EN . A logic zero input on EN restores bias
to the drive and control circuits and turns the power on. The enable input is compatible with both TTL and CMOS
logic levels.
current sense
A sense FET monitors the current supplied to the load. The sense FET measures current more efficiently than
conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry
sends a control signal to the driver. The driver, in turn, reduces the gate voltage and drives the power FET into
its saturation region, which switches the output into a constant current mode and holds the current constant
while varying the voltage on the load.
thermal sense
An internal thermal-sense circuit shuts off the power switch when the junction temperature rises to
approximately 140
°
C. Hysteresis is built into the thermal sense circuit. After the device has cooled
approximately 20
°
C, the switch turns back on. The switch continues to cycle off and on until the fault is removed.
undervoltage lockout
A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V, a control
signal turns off the power switch.
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參數(shù)描述
TPS2071DAP 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAP 制造商:Texas Instruments 功能描述:IC PCMCIA PWR I/F SW 32-HTSSOP 制造商:Texas Instruments 功能描述:IC, PCMCIA PWR I/F SW 32-HTSSOP
TPS2071DAPG4 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAPR 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus 4 Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAPRG4 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus 4 Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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