L6714TR STMicroelectronics, L6714TR Datasheet - Page 32

• Manufacturer Part Number: L6714TR
• Description: IC CTRLR 4PHASE W/DRVRS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6714TR

• Applications: Controller, Intel VR10, VR11, AMD CPU
• Voltage - Input: 12V
• Number Of Outputs: 4
• Voltage - Output: 0.3 ~ 1.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5095-2

Current reading and current sharing loop
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Current reading and current sharing loop
L6714 embeds a flexible, fully-differential current sense circuitry that is able to read across
both low side or inductor parasitic resistance or across a sense resistor placed in series to
that element. The fully-differential current reading rejects noise and allows placing sensing
element in different locations without affecting the measurement's accuracy. The kind of
sense element can be simply chosen through the DAC/CS_SEL pin according to
Table
Current sharing control loop reported in
the current delivered by each phase and the average current
between the read current I
with a proper gain is used to adjust the duty cycle whose dominant value is set by the
voltage error amplifier in order to equalize the current carried by each phase. Details about
connections are shown in
Figure 8.
10.
AVG
Current sharing loop.
Figure
INFOx
and the reference I
9.
I
I
I
From EA
I
I
INFO1
AVG
INFO2
INFO3
INFO4
Figure
8: it considers a current I
AVG
is then converted into a voltage that
I
AVG
=
PWM1 Out
PWM2 Out
PWM3 Out
PWM4 Out
I
INFOx
INFOx
proportional to
N
. The error
See
L6714