參數(shù)資料
型號(hào): TPS2359RHHT
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC36
封裝: 6 X 6 MM, GREEN, PLASTIC, QFN-36
文件頁(yè)數(shù): 16/53頁(yè)
文件大小: 1074K
代理商: TPS2359RHHT
www.ti.com
SLUS792F – FEBRUARY 2008 – REVISED AUGUST 2010
Register 4
Table 7. Register 4: Channel 12B Configuration (Read/write)
BIT
NAME
DEFAULT
DESCRIPTION
0
12BFT0
1
Setting bit increases 12B fault time by 0.5 ms.
1
12BFT1
0
Setting bit increases 12B fault time by 1 ms.
2
12BFT2
0
Setting bit increases 12B fault time by 2 ms.
3
12BFT3
0
Setting bit increases 12B fault time by 4 ms.
4
12BFT4
0
Setting bit increases 12B fault time by 8 ms.
5
12BEN
0
Clearing bit disables 12B by pulling PASSB and BLKB to 0 V.
6
12BUV
0
Setting bit prevents enabling unless OUT12B < bleed down threshold.
7
12BDS
0
Clearing bit disconnects OUT12B bleed down resistor.
12BFT[4:0] These five bits adjust the 12B channel fault time. The least-significant bit has a nominal weight of 0.5
ms, so fault times ranging from 0.5 ms (for code 00001B) to 15.5 ms (for code 11111B) can be programmed. In
general the shortest fault time that fully charges downstream bulk capacitors without generating a fault should be
used. Once the load capacitors have fully charged, the fault time can be reduced to provide faster short circuit
protection. See Setting Fault Time section.
12BEN This bit serves as a master enable for channel 12B. Setting this bit allows the 12B channel to operate
normally. Clearing this bit disables the channel by pulling PASSB and BLKB low.
12BUV Setting this bit prevents channel 12B from turning on until OUT12B falls below the bleed down threshold
of 100 mV. This feature ensures that downstream devices reset by requiring their supply voltage to fall to nearly
zero before the channel can enable them.
12BDS Clearing this bit disconnects the bleed down resistor that otherwise connects from OUT12B to ground.
Systems using redundant power supplies should clear 12BDS to prevent the bleed down resistor from
continuously sinking current.
Copyright 2008–2010, Texas Instruments Incorporated
23
Product Folder Link(s): TPS2359
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