參數(shù)資料
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)： 15/53頁
文件大?。?/td> 1074K
代理商： TPS2359RHHT
SLUS792F – FEBRUARY 2008 – REVISED AUGUST 2010
www.ti.com
Register 3
Table 6. Register 3: Channel 12B Configuration (Read/write)
BIT
NAME
DEFAULT
DESCRIPTION
0
12BCL0
1
Clearing bit reduces 12B current limit & fast threshold by 5%.
1
12BCL1
1
Clearing bit reduces 12B current limit & fast threshold by 10%.
2
12BCL2
1
Clearing bit reduces 12B current limit & fast threshold by 20%.
3
12BCL3
1
Clearing bit reduces 12B current limit & fast threshold by 40%.
4
12BPG0
1
Clearing bit reduces 12B power good threshold by 600 mV.
5
12BPG1
1
Clearing bit reduces 12B power good threshold by 1.2 V.
6
12BHP
0
Setting bit shifts 12B OR VTURNOFF from –3 mV to +3 mV nominal.
7
12BOR
1
Clearing bit turns off 12B ORing FET by pulling BLKB low.
12BCL[3:0] These four bits adjusts the 12B current limit and fast trip threshold using the I2C interface. Setting
the bits to 1111B places the 12B current limit at its maximum level, corresponding to 675 mV at SUM12B. The
fast trip threshold then equals 100 mV. Clearing all bits reduces the current limit and fast trip threshold to 25% of
these maximums.
12BPG[1:0] These two bits adjust the 12B power good threshold. Setting the bits to 11B places the power good
threshold at its maximum level of 10.5 V . Setting the bits to 00B places the threshold at its minimum level of 8.7
V. The lower thresholds may prove desirable in systems that routinely experience large voltage droops.
12BHP Setting this bit moves the 12B ORing turn off threshold from –3 mV to +3 mV. A positive threshold
prevents reverse current from flowing through the channel, but it may cause the ORing FET to repeatedly cycle
on-and-off if the load cannot maintain the required positive voltage drop across the combined resistance of the
external FETs and the sense resistor. For further information, see Adjusting ORing Turn Off threshold For High
Power Loads section.
12BOR Clearing this bit forces the BLKB pin low, keeping the 12B ORing FET off. Clearing this bit does not
prevent current from flowing through the FET’s body diode.
22
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2359
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