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TPS40140 Datasheet(PDF) 34 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) 34 Page - Texas Instruments

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CLKIO
PHSEL
TPS40140
MASTER
R1
SLAVE1
CLKIO
PHSEL
TPS40140
20
µA
TPS40140
DUAL OR 2-PHASE, STACKABLE CONTROLLER
SLUS660A – SEPTEMBER 2005 – REVISED JULY 2006
5.27.3.2 Two ICs Operation
To increase the total current capability, or number of outputs, a single Slave controller can be added as
shown in Figure 5-15
Figure 5-15. Master Controller and One Slave Controller, Four Phases
In this configuration, the Master senses that there is one Slave controller, and distributes the CLKIO
signal. The Slave controller senses the zero-volt level on its PHSEL pin and delays the proper number of
CLKIO pulses to be 90
° out of phase with the Master.
5.27.3.3 Three ICs Operation
To increase the total current capability to six phases, or to increase the number of outputs, two Slave
controllers can be added as shown in Figure 5-16. In this configuration for perfect interleaving, the Master
and Slaves are 120
° out of phase. The CLKIO signal has six clocks for each cycle of the switching period;
therefore, the switching period is reduced. In this six-phase mode, the switching frequency is increased
33%.
APPLICATION INFORMATION
34
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