參數(shù)資料
型號: TPS2459RHB
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32
封裝: PLASTIC, QFN-32
文件頁數(shù): 36/48頁
文件大?。?/td> 852K
代理商: TPS2459RHB
www.ti.com
SLUS917D – FEBRUARY 2009 – REVISED MAY 2010
REVISION HISTORY
Changes from Revision A (August 2009) to Revision B
Page
Added New Typical Application Diagram .............................................................................................................................. 1
Added EN12 .......................................................................................................................................................................... 2
Deleted EN12 ........................................................................................................................................................................ 2
Deleted m .............................................................................................................................................................................. 3
Added ................................................................................................................................................................................ 3
Deleted m .............................................................................................................................................................................. 3
Added ................................................................................................................................................................................ 3
Added New Block Diagram ................................................................................................................................................... 6
Changed 3.3-V Channel Circuitry Block Diagram ................................................................................................................ 7
Deleted Setting bit makes EN3 and EN12 pins active low. ................................................................................................ 16
Added This bit must be 0. ................................................................................................................................................... 16
Added This bit must be 0. ................................................................................................................................................... 16
Deleted Setting bit makes EN3 and EN12 pins active low.Setting bit makes external ENx pins active low; clearing bit
makes pins active high. (Actually, setting this bit reverses polarity of ENPOL R14[5] which will nominally be set as
active low). .......................................................................................................................................................................... 20
Added This bit must be 0. ................................................................................................................................................... 20
Deleted Setting this bit makes the EN12 and EN3 pins active low. ................................................................................... 20
Added This bit must be 0. ................................................................................................................................................... 20
Deleted Latches high when OUT12 goes from above VTH_PG to below VTH_PG. ......................................................... 21
Added This bit is set each time channel is turned on. A second read cycle will indicate true status. ................................ 21
Deleted Latches high when OUT3 goes from above VTH_PG to below VTH_PG. ........................................................... 21
Added This bit is set each time channel is turned on. A second read cycle will indicate true status. ................................ 21
Added This bit remains set until Register 8 is read. This bit is set each time channel is turned on. A second read
cycle after turn on is required to determine true status. ..................................................................................................... 21
Added This bit remains set until Register 8 is read. This bit is set each time channel is turned on. A second read
cycle after turn on is required to determine true status. ..................................................................................................... 21
Added This bit remains set until Register 8 is read. This bit is set each time channel is turned on. A second read
cycle after turn on is required to determine true status. ..................................................................................................... 21
Added New 12-V Channel Threshold Circuitry Diagram .................................................................................................... 26
Added New RC Slew Rate Control Diagram ...................................................................................................................... 27
Added New 12-V Path Diagram, replaced ORing Thresholds Diagram ............................................................................. 30
Deleted ORing Thresholds ................................................................................................................................................. 30
Added 12-V Path ................................................................................................................................................................ 30
Added ORing Thresholds High Power vs. Low Power ....................................................................................................... 31
Changed 32 ms .................................................................................................................................................................. 34
Added 15.5 ms .................................................................................................................................................................... 34
Added the following power; ................................................................................................................................................. 34
Added New TPS3459 Redundant System Schematic Diagram ......................................................................................... 37
Copyright 2009–2010, Texas Instruments Incorporated
41
Product Folder Link(s): TPS2459
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