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TPS2343DDPG3 Datasheet(PDF) 2 Page - Texas Instruments |
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TPS2343DDPG3 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 40 page TPS2343 SLUS644B − FEBRUARY 2005 − MAY 2005 2 www.ti.com DESCRIPTION (CONT.) Auxiliary power control circuits switch, ramp, and monitor 3.3-V auxiliary power to each slot and control data switches that connect slot power management event (PME) outputs to the main PME bus after auxiliary supply is ramped. PME is disconnected when a board is turned off or a fault occurs on the board’s auxiliary power. A fault on auxiliary power also shuts off main power to that board. VIO control consists of gate drivers to select between 3.3 V and 1.5 V in response to command and current limiting circuitry to shut down a slot in the event of over current. Each TPS2343 contains power FETs for 12 V, −12 V, and auxiliary 3.3 V for two slots. These power FETs are short-circuit protected, slew rate controlled, and over-temperature protected. The TPS2343 includes novel current limiting circuitry that limits instantaneous peak current and only shuts off the slot if the current remains out of spec for an extended time. ORDERING INFORMATION TA PACKAGE(1) TA HTSSOP (DDP) −40 °C to +85°C TPS2343DDP (1) Add suffix R to device type (e.g. TPS2343DDPR) to specify taped and reeled. Osolete Device |
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