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)： 14/53頁(yè)
文件大小： 1074K
代理商： TPS2359RHHT
www.ti.com
SLUS792F – FEBRUARY 2008 – REVISED AUGUST 2010
Register 2
Table 5. Register 2: Channel 3A Configuration (Read/write)
BIT
NAME
DEFAULT
DESCRIPTION
0
3AFT0
1
Setting bit increases 3A fault time by 0.5 ms.
1
3AFT1
0
Setting bit increases 3A fault time by 1 ms.
2
3AFT2
0
Setting bit increases 3A fault time by 2 ms.
3
3AFT3
0
Setting bit increases 3A fault time by 4 ms.
4
3AFT4
0
Setting bit increases 3A fault time by 8 ms.
5
3AEN
0
Clearing bit disables 3A.
6
3AUV
0
Setting bit prevents enabling unless OUT3A < bleed down threshold.
7
3ADS
0
Clearing bit disconnects OUT3A bleed down resistor.
3AFT[4:0] These five bits adjust the 3A 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. See Setting Fault Time section.
3AEN This bit serves as a master enable for channel 3A. Setting this bit allows the 3A channel to operate
normally, provided the EN3A pin is also asserted. Clearing this bit disables the channel by removing gate drive to
the internal pass FET, regardless of the state of the EN3A pin.
3AUV Setting this bit prevents channel 3A from turning on until OUT3A 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.
3ADS Clearing this bit disconnects the bleed down resistor that otherwise connects from OUT3A to ground.
Systems using redundant power supplies should clear 3ADS to prevent the bleed down resistor from
continuously sinking current.
Copyright 2008–2010, Texas Instruments Incorporated
21
Product Folder Link(s): TPS2359
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