L6714 STMicroelectronics, L6714 Datasheet - Page 63

• Manufacturer Part Number: L6714
• Description: IC CTRLR 4PH W/DRIVERS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6714

• 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
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6714
23.3
23.4
Time constant matching error tolerance (TOB TCMatching)
●
●
●
Temperature measurement error (V
Error in the measured temperature (for thermal compensation) impacts on the output
regulated voltage since the correction form the compensation circuit is not what required to
keep the output voltage flat.
The measurement error (
compared with the sensing resistance (R
follow:
Inductance and capacitance Tolerance (k
in the value of the capacitor used for the Time Constant Matching causes over/under
shoots after a load transient appliance. This impacts the output voltage and then the
TOB. Since all the sense elements results to be in parallel, the error related to the time
constant mismatch has to be divided by the number of phases (N).
Capacitance Temperature Variations (k
matching also vary with temperature ( T
ad before. Since all the sense elements results to be in parallel, the error related to the
time constant mismatch has to be divided by the number of phases (N).
All these parameters impact the Dynamic AVP, so they must be weighted on the
maximum dynamic voltage swing (I
results:
TOB
TCMatching
Temp
) must be multiplied by the copper temp coefficient ( ) and
V
TC
=
=
dyn
V
SENSE
--------------------------
2
AVPDyn
R
). Total error due to time constant mismatch
SENSE
Ct
C
). The capacitor used for time constant
Temp
L
) impacting on the output voltage transients
): this percentage affects the AVP voltage as
, k
C
). Variations in the inductance value and
k
---------------------------------------------------------
2
L
V
TC
+
AVP
k
2
C
)
Tolerance band (TOB) definition
+
N
k
Ct
TC
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