- 您現在的位置：買賣IC網 > Datasheet目錄47 > TPS2346PWRG4 (Texas Instruments)IC HOT SWAP POWER MGR 24-TSSOP Datasheet資料下載
參數資料
| 型號： | TPS2346PWRG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 8/30頁 |
| 文件大小： | 490K |
| 描述： | IC HOT SWAP POWER MGR 24-TSSOP |
| 標準包裝： | 2,000 |
| 類型： | 熱交換控制器 |
| 應用： | 光纖學網絡（ONET） |
| 內部開關： | 無 |
| 電源電壓： | -5.2V，3.3V，5V，5.15V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第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
TPS2346
SLUS529 MAY 2002
8
www.ti.com
functional overview (continued)
As each back-end voltage is ramped, its level is validated to ensure it is within the established UV and OV
tolerances at the expiration of a programmable time period, protecting against start-up into faulted loads. The
same capacitor at the IRAMP pin which sets the current ramp rate is also used to establish this ramp-up time
limit. If all four supplies successfully reach a known good state, the PG
output signal is pulled low to allow
enumeration of the add-in card.
To protect the backplane power bus, the TPS2346 provides an electronic circuit breaker that trips upon detecting
an overcurrent event. The detection threshold of an overcurrent event is internally set to approximately two
times (2x) IMAX. The 5.2-V channel also includes a circuit breaker function; its trip threshold is always a
minimum of 50 mV above the current-limit sense voltage. If any channel trips the circuit breaker, all supply
outputs are rapidly turned off, and remain latched off. Also, the PG
output becomes high-impedance. The
TPS2346 can be reset by cycling either the ENABLE
input or power to the device.
The low, 20-mV (150 mV on the 5.2-V channel) nominal sense voltage limit allows the use of low-value sense
resistors, or for high-current applications, the use of PC board copper trace. This helps minimize the insertion
loss across the hot swap interface. Further insertion loss reduction is achieved via the on-chip charge pump,
which ensures maximum gate overdrive on each of the three external pass MOSFETs on the positive supply
channels. This feature helps users obtain lower R
DS(on)
characteristics with their preferred N-channel
MOSFETs.
Under a normal PC board shutdown event, the TPS2346 also turns off power in a controlled manner. To initiate
a shutdown, ENABLE
is brought to a logic high during a healthy supply state (outputs on and no faults present).
The supply outputs are then sequentially ramped off in the reverse order of the ramp-up sequence. After all
supply outputs are off, the TPS2346 goes into a low-current sleep mode.
相關PDF資料 |
PDF描述 |
|---|---|
| TPS24711DGSR | IC CTRLR HOT SWAP 2.5-18V 10MSOP |
| TPS2491DGSG4 | IC POS HV HOT-SWAP CTRLR 10-MSOP |
| W83772G | IC H/W MONITOR 8-TSSOP |
| W83L786G | IC H/W MONITOR 28-SSOP |
| X96011V14IZ | IC SENSOR TEMP BIAS SGL 14-TSSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2350D | 功能描述:熱插拔功率分布 Pwr Mngr for Redund -48V Supplies RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2350DG4 | 功能描述:熱插拔功率分布 Pwr Mngr for Redund -48V Supplies RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2350DR | 功能描述:熱插拔功率分布 Pwr Mngr for Redund -48V Supplies RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2350DRG4 | 功能描述:熱插拔功率分布 Pwr Mngr for Redund -48V Supplies RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2350EVM | 功能描述:電源管理IC開發工具 Telecom -48V OR-ing Diode RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發布緊急采購，3分鐘左右您將得到回復。