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TPS40140 Datasheet(PDF) 22 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) 22 Page - Texas Instruments

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PWM −A
1
2
3
4
5
6
7
8
9
EXT CLK−A
EXT CLK−S
1
2
3
4
5
6
7
8
1
11
10
3
2
PWM −S
UDG−06032
5.22 SPLIT INPUT VOLTAGE OPERATION
R
SET + VOUT
1
V
IN2
*
1
V
IN1
100 kW
(7)
TPS40140
DUAL OR 2-PHASE, STACKABLE CONTROLLER
SLUS660A – SEPTEMBER 2005 – REVISED JULY 2006
Figure 5-7. Synchronizing a Single Controller to an External Clock
It may be advantageous to operate a master controller’s power stages from VIN1, different from the Slave
controller(s) power stages, VIN2 where VIN1 > VIN2. This enables the system designer to optimize the
current taken from the system input voltages. In order to balance the output currents, a programmed offset
is applied to ILIM2 of the slave controller(s). The voltage on this pin sets the offset current for channel 2.
The ramp offset is determined by a resistor, RSET, connected to the ILIM2 pin of the slave, and is given by:
22
APPLICATION INFORMATION
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