參數(shù)資料
型號： TPS23841_07
廠商： Texas Instruments, Inc.
英文描述： HIGH-POWER, WIDE VOLTAGE RANGE, QUAD-PORT ETHERNET POWER SOURCING EQUIPMENT MANAGER
中文描述： 大功率，寬電壓范圍，四端口以太網(wǎng)供電設(shè)備管理器
文件頁數(shù)： 17/52頁
文件大小： 1011K
代理商： TPS23841_07
www.ti.com
AM Power Delivery
AM Faults and INTB Output
AM faults are:
Port under and over voltage faults, (if enabled, see Over/Under Voltage Fault section)
Over current faults
Under current (DC Disconnect) fault
Thermal shutdown (TSD) fault
Watchdog timer faults (disabled via WD_DIS pin)
Any one of the first four fault conditions listed above causes the port to shut down, and a 3-bit fault code to be
latched into the affected port's Status Read 1 register (addr = 0100b). Watchdog faults cause all four ports to
shut down. Faulted ports are temporarily disabled after a fault has been detected and latched.
TPS23841
SLUS745–NOVEMBER 2006
AUTO MODE FUNCTIONAL DESCRIPTION (continued)
After successfully discovery and classification of a valid PD the power is delivered by controlling the current to
the PD until its current requirements are met or until the internal current limit is reached (approximately 650 mA).
The power switch is fully enhanced after 500
μ
s.
Figure 5
show the voltage and the current that is being applied
to the PD during power-up and reaching the PD load of 250mA.
Figure 5.
After power has been applied to the PD the TPS23841 automatically enters the current and voltage sample
mode. The sample mode performs 31 current measurements and 1 voltage measurement. Each measurement
takes approximately 18 ms to complete. The port remains powered and the current/voltage measurement cycle
continues until a fault condition occurs. The current and voltage measurements are both stored in the A/D
current and voltage registers and can be accessed through the I
2
C pins. This allows power management in the
AM if it is desired.
The INTB pin is an open-drain, active-low output which is asserted if a fault condition occurs on any of the four
ports. This indication is asserted for any of the port faults which result in a code displayed in the port status
register (the faults listed in
Table 8
). In automode, the fault latch, the status register fault bits, and consequently,
INTB assertion, are cleared by expiration of the 750-ms TED timer.
17
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參數(shù)描述
TPS23841PAP 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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
TPS23841PAPG4 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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
TPS23841PAPR 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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
TPS23841PAPRG4 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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
TPS23841PJD 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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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