L6713A STMicroelectronics, L6713A Datasheet - Page 33

• Manufacturer Part Number: L6713A
• Description: IC CTRLR 2/3PH W/DRIVERS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6713A

• Applications: Controller, Intel VR10, VR11, AMD CPU
• Voltage - Input: 12V
• Number Of Outputs: 3
• 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
• Output Current: 2 A
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6713A
The Rg trans-conductance resistor has to be selected using the following formula, in order
to guarantee the correct functionality of internal current reading circuitry:
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 9.
Current sharing loop
AVG
Figure
INFOx
Rg
and the reference I
8.
=
DCR MAX
------------------------------- -
(PHASE2 Only when using 3-PHASE Operation)
I
I
I
From EA
I
Figure
INFO1
AVG
INFO2
INFO3
20μA
(
9: it considers a current I
Current reading and current sharing loop
)
⋅
I
------------------------------ -
OUT
AVG
(
N
MAX
is then converted into a voltage that
PWM1 Out
PWM2 Out
PWM3 Out
)
AVG
=
ΣI
INFOx
INFOx
⁄
N
proportional to
. The error
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