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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TPS2340APFPR датащи(PDF) 1 Page - Texas Instruments |
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TPS2340APFPR датащи(HTML) 1 Page - Texas Instruments |
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1 / 27 page  TPS2340A SLUS528A – MARCH 2002 – REVISED AUGUST 2002 DUALSLOT PCI HOT PLUG POWER CONTROLLER 1 www.ti.com FEATURES D 12-V, –12-V, 3.3-V, 5-V Main Power Switching and Auxiliary 3.3-V Power Switching D 12-V, –12-V And Auxiliary 3.3-V Power FETs D Hot-Swap Protection and Control of All Supplies D Overcurrent Protection for All Supplies D Isolation of Any Load Fault in One Slot from Any Other Slot D Undervoltage Monitoring for the Main 12-V, 3.3-V, 5-V and Auxiliary 3.3-V Supplies D Power Fault Latching D Overtemperature Shutdown D Slot Status Readout with Open-Drain LED Drivers D Mechanical Switch Inputs for Attention Request and Electrical Interlock D Serial Interface for Power Control, Power Status, Slot Control and Slot Status D Compatible With 33-MHz, 66-MHz, and 133-MHz Bus Speeds D Compliant To PCI And PCI-X Hot Plug Specifications D One TPS2340A Supports Two Slots DESCRIPTION The TPS2340A contains main supply power control, auxiliary supply power control, power FETs for 12 V, –12 V and auxiliary 3.3 V supplies, and a serial interface for communications with and control of slots. Each TPS2340A contains supply control and switching for two slots. The main power control circuits start with all supplies off and hold all supplies off until power to the TPS2340A is valid on all positive supplies. When power is requested via the serial interface, the control circuit applies constant current to the gates of the power FETs, allowing each FET to ramp load voltage linearly. Each supply can be programmed for a desired ramp rate by selecting a gate capacitor for the power FET for that supply. The power control circuits also monitor load current and latch off that slot if the load current exceeds a programmed maximum value. In addition, once the 12-V, the 5-V, and the 3.3-V FETs are fully enhanced, the load voltage is monitored. If load voltage drops out of specification after these FETs are fully enhanced, the slot latches off. This provides another level of protection from load fault. The auxiliary power control circuit switches, ramps, and monitors 3.3-V auxiliary power to each slot. The auxiliary control circuit also controls data switches that connect slot interrupts (power management event [PME] outputs) to the main interrupt PME bus after 3.3-V auxiliary supply is connected. PME is disconnected when a board is turned off or faulted. Each TPS2340A contains power FETs for 12 V at 500 mA, –12 V at 100 mA, and auxiliary 3.3 V at 375 mA for each slot. These power FETs are short-circuit protected, slew rate controlled, and over-temperature protected. The serial interface communicates with a slot controller using a synchronous serial protocol. The interface communicates with the slot, status LEDs, and mechanical switches with individual, dedicated lines. The interface operates from 3.3-V power but inputs are 5-V tolerant. Status LED drivers are capable of driving 24-mA LEDs via integrated open-drain MOSFETs. Mechanical switch inputs have internal pull-up and hysteresis buffers. The serial interface controls slot power, bus connection, and LED outputs, and monitors board capability, power fault, and switch input status. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2002, Texas Instruments Incorporated |
Аналогичный номер детали - TPS2340APFPR |
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Аналогичное описание - TPS2340APFPR |
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