參數(shù)資料
型號(hào)： TPS2341PHPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 4-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48
封裝： POWERPAD, HTQFP-48
文件頁(yè)數(shù)： 7/31頁(yè)
文件大小： 649K
代理商： TPS2341PHPR
TPS2341
SLUS513A MAY 2003 REVISED JULY 2004
15
www.ti.com
APPLICATION INFORMATION
Fault Logic
The main supply switches require the inputs to be healthy before turning on. The slot is shut down upon an
overload condition or output undervoltage condition and all switches shut off upon a device overtemperature
condition. The switch starts to turn on when the P12VINA, V5IN and V3IN supply inputs are above the
undervoltage thresholds, the PGOOD input is active and the PWRENA (or PWRENB for slot B) control output
from the I2C serial interface is active.
The P12VOA, P5VISA and P3VISA pins monitor the load for an undervoltage fault once the +12-V, +5-V and
+3.3-V switches are fully enhanced. The +12-V, +5-V, +3.3-V and 12-V load currents are monitored for an
overload condition continuously upon slot enable. The device overtemperature sensor is always active, cannot
be masked with the test mode fault mask, and shuts down all switches upon sensing excessive internal die
temperature.
The main load faults are latched and can be cleared by cycling the slot enable with the I2C serial interface (if
operating in serial mode), by transitioning slot enable from high to low (if operating in hardware enable mode),
or by dropping and then raising power to the TPS2341.
The 3.3VAux standby switch requires only the 3VSTBYIN supply to be healthy before turning on. An overload
condition shuts down the slot standby switch. The latched fault can be cleared by toggling the SWA (or SWB
for slot B) input or by cycling the standby supply voltage.
The 3.3VAux main switch requires the main supply voltages to be within specifications before turning on. The
slot 3.3VAux main switch shuts off upon an overload condition and all switches shut off upon the device over
temperature condition. The latched fault can be cleared by cycling the SWA (or SWB for slot B) 3.3VAux disable
pin or removal and assertion of input supply voltage.
The I2C serial interface can be used to determine the offending fault. Polling the STATUS READ register
determines which slot caused the fault and differentiates between the main supply switches or the 3.3VAux
switches. The slot STATUS register indicates an undervoltage fault, thermal shutdown, overload fault or
commanded disable occurred. The OVERLOAD register isolates an overload condition to the individual supply
switch.
Operation Without I2C
The TPS2341 can be used in a system without I2C, although some of the diagnostic capabilities of the TPS2341
are lost. Slot main power is applied by applying a rising edge to the PGOOD input and then applying a rising
edge to the appropriate slot enable input ENx. Slot main power status is observed at the PGOOD_OUTx output.
In the event of a loss of power on any main input, the TPS2341 resets to all slots off. Main slot power restarts
on the next rising edge of ENx after power is recovered.
In a system without I2C, the interrupt output IRQ# is not meaningful and should not be connected. SDA should
be pulled up to 3.3 V. SCL and ADDR1 should be grounded.
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參數(shù)描述
TPS2342PFP 功能描述:熱插拔功率分布 Hot Plug Power Controller 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
TPS2342PFPG4 功能描述:熱插拔功率分布 Hot Plug Power Controller 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
TPS2342PFPR 功能描述:熱插拔功率分布 Hot Plug Power Controller 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
TPS2342PFPRG4 功能描述:熱插拔功率分布 Hot Plug Power Controller 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
TPS2343DDP 功能描述:熱插拔功率分布 Dual Slot PCI-X 2.0 Hot-Plug Pwr Cntrlr 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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