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| 型號： | 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 |
| 文件頁數(shù)： | 13/53頁 |
| 文件大小： | 1074K |
| 代理商： | TPS2359RHHT |
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SLUS792F – FEBRUARY 2008 – REVISED AUGUST 2010
www.ti.com
Register 1
Table 4. Register 1: Channel 12A Configuration (Read/write)
BIT
NAME
DEFAULT
DESCRIPTION
0
12AFT0
1
Setting bit increases 12A fault time by 0.5 ms.
1
12AFT1
0
Setting bit increases 12A fault time by 1 ms.
2
12AFT2
0
Setting bit increases 12A fault time by 2 ms.
3
12AFT3
0
Setting bit increases 12A fault time by 4 ms.
4
12AFT4
0
Setting bit increases 12A fault time by 8 ms.
5
12AEN
0
Clearing bit disables 12A by pulling PASSA and BLKA to 0 V.
6
12AUV
0
Setting bit prevents enabling unless OUT12A < bleed down threshold.
7
12ADS
0
Clearing bit disconnects OUT12A bleed down resistor.
12AFT[4:0] These five bits adjust the 12A 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.
12AEN This bit serves as a master enable for channel 12A. Setting this bit allows the 12A channel to operate
normally. Clearing this bit disables the channel by pulling PASSA and BLKA low.
12AUV Setting this bit prevents channel 12A from turning on until OUT12A 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.
12ADS Clearing this bit disconnects the bleed down resistor that otherwise connects from OUT12A to ground.
Systems using redundant power supplies should clear 12ADS to prevent the bleed down resistor from
continuously sinking current.
20
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2359
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