參數(shù)資料
型號(hào)： TPS40180RGER
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 0.05 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC24
封裝： GREEN, PLASTIC, VQFN-24
文件頁數(shù)： 25/52頁
文件大小： 1291K
代理商： TPS40180RGER
www.ti.com
2
DIFFO
FB
1
5
VSH
7
8
RT
VDD
24
SS
19 CLKIO
21
15
TPS40180
CLK Master
Loop 1 Master
PSEL
2
DIFFO
FB
1
5
VSH
7
8
RT
VDD
24
SS
19 CLKIO
21
15
TPS40180
Slave
PSEL
COMP
2
DIFFO
FB
1
5
VSH
7
8
RT
VDD
24
SS
19 CLKIO
21
15
TPS40180
Slave
PSEL
COMP
10 kW
2
DIFFO
FB
1
5
VSH
7
8
RT
VDD
24
SS
19 CLKIO
21
15
TPS40180
Slave
PSEL
COMP
2
DIFFO
FB
1
5
VSH
7
8
RT
VDD
24
SS
19 CLKIO
21
15
TPS40180
CLK Slave
Loop 2 Master
PSEL
COMP
V
OUT1
V
OUT2
UDG-07035
VSH Line in the Multiphase
SLVS753B – FEBRUARY 2007 – REVISED NOVEMBER 2007
Finally, a configuration diagram for multiple multiphase converters is shown in Figure 33. This is just a
combination of the two previous examples and should follow intuitively once those are understood. It is the
example of Figure 31 with a CLK slave but control loop master added to create a second output voltage while
sharing phasing information with the first converter group. A slave has been added to the second control loop
master controller in this case as well creating a grouping of controllers that provide a second output voltage. This
can have a significant impact on the required input filter capacitance if all the converters are located close to one
another.
Figure 33. Multiple Multiphase Configuration
The examples in Figure 31 through Figure 33 show the VSH line distributed among the various controllers
comprising a single output voltage grouping. This is the recommended practice for best results. However, if the
ground potential difference between the controllers is not great (no more that 10 mV), distribution of VSH among
the controllers in a particular output voltage group may not be necessary. VSH is the valley voltage of the
controller and distributing it provides a known current reference signal among the controllers that when compared
with the distributed COMP signal from the master, serves to better balance the current among the modules. If the
ground potential between modules in the same output voltage grouping is small enough, there error contributed
by not distributing the VSH signal becomes on the order of systematic errors already present and its usefulness
is diminished. A decision must be made on an individual application basis.
Copyright 2007, Texas Instruments Incorporated
31
Product Folder Link(s): TPS40180
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