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TPS40140 Datasheet(PDF) 37 Page - Texas Instruments

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Part No. TPS40140
Description  DUAL OR 2-PHASE, STACKABLE CONTROLLER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40140 Datasheet(HTML) 37 Page - Texas Instruments

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CLKIO
PHSEL
SLAVE2
CLKIO
PHSEL
TPS40140
R2
R1
TPS40140
MASTER
SLAVE1
CLKIO
PHSEL
TPS40140
SLAVE5
CLKIO
PHSEL
TPS40140
SLAVE4
CLKIO
PHSEL
TPS40140
SLAVE3
CLKIO
PHSEL
TPS40140
ILIM2
ILIM2
ILIM2
BP5
20
µA
TPS40140
DUAL OR 2-PHASE, STACKABLE CONTROLLER
SLUS660A – SEPTEMBER 2005 – REVISED JULY 2006
5.27.3.5 Six ICs Operation
To further increase the total current capability to twelve phases, or to increase the number of outputs, five
Slave controllers can be added as shown in Figure 5-18
Figure 5-18. Master Controller and Five Slave Controllers, 12 Phases
In this configuration, the Master senses that there are two Slave controllers (due to the 2 resistors) and
distributes a six-phase CLKIO signal. Slaves 1 and 2 are turned on at 60
° and 120° respectively, as before
with 2 Slaves. However, to get 12 phases with a 6-phase clock, both edges of the CLKIO signal are used
to control the slaves. With the ILIM2 tied high on Slaves 3, 4, and 5, they turn on at the rising edge of
CLKIO while the Master and Slaves 1 and 2 turn on at the falling edge of CLKIO.
If 4 Slaves are desired, just delete one of the Slaves from Figure 5-18. The interleaving will not be perfect
because there will be 30 degrees between the Master and 3 Slaves. The deleted Slave will cause 60
°
between the 2 adjacent Slaves. See Figure 5-20 for phasing details.
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APPLICATION INFORMATION
37


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