參數資料
型號: TPS2343DDPG3
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO80
封裝: GREEN, PLASTIC, HTSSOP-80
文件頁數: 19/42頁
文件大?。?/td> 942K
代理商: TPS2343DDPG3
TPS2343
SLUS644B FEBRUARY 2005 MAY 2005
26
www.ti.com
APPLICATION INFORMATION
The difference between the lower limit of both the system power supply and the PCI specification slot voltage
value is the system voltage budget. System power supplies specified with slightly high output voltage increases
the system voltage budget making the FETs RDS(on) less critical. To calculate the RDS(on), sum the voltage drop
due to contact resistance of the power input connector, the PCI connector, and the sense resistor. This sum is
subtracted from the system voltage budget to give the VRDS(on) and ultimately the RDS(on).
+
+
+
+
VPower Conn
VRDS ON
RDS ON
VR SENSE
R SENSE
PS Connector
R = 0.002 Ohms
Power Supply
Limits 5 V+/3%
5.15 V to 4.85 V
+
8
Slot
VPCIconn
R = 0.02 Ohm/pin
PCI Limit
5.25 V to 4.75 V
4
Figure 3.
Terms
Terms are defined below referenced by an example calculation.
D System voltage budget = PCI lower limit power supply lower limit
D System voltage drop= V power connector + V PCI connector + VRSENSE
(For power and ground paths)
D VRDS(on) = system voltage budget system voltage drop
D RDS(on) = VRDS(on)/max operating current
相關PDF資料
PDF描述
TPS2343DDPR 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO80
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