IR3080M International Rectifier, IR3080M Datasheet - Page 15

• Manufacturer Part Number: IR3080M
• Description: IC PHASE CONTROLLER 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3080M

• Applications: Processor
• Current - Supply: 11mA
• Voltage - Supply: 9.5 V ~ 14 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 32-MLPQ
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 150kHz to 1.0MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IR3080M

Inductor DCR Temperature Correction
If the thermal compensation of the inductor DCR provided by the temperature dependent gain of the current sense
amplifier is not adequate, a negative temperature coefficient (NTC) thermistor can be used for additional correction.
The thermistor should be placed close to the inductor and connected in parallel with the feedback resistor, as
shown in Figure 9. The resistor in series with the thermistor is used to reduce the nonlinearity of the thermistor. A
similar network must be placed on the BBFB pin to ensure proper operation during a transition to a lower VID code
with Body Braking
Remote Voltage Sensing
To reduce the effect of impedance in the ground plane, the VOSNS- pin is used for remote sensing and connected
directly to the load. The VDAC voltage is referenced to VOSNS- to avoid additional error terms or delay related to a
separate differential amplifier. The capacitor connecting the VDAC and VOSNS- pins ensure that high speed
transients are fed directly into the error amplifier without delay.
Page 15 of 41
TM
.
Figure 9. Temperature compensation of inductor DCR
VDAC
Control IC
VDRP
Amplifier
Error
Amplifier
+
-
IFB
-
+
VDAC
Figure 8. Adaptive voltage positioning
Control IC
VDRP
EAOUT
FB
IIN
AVP
Amplifier
Error
Amplifier
+
-
IFB
RDRP
-
+
RFB
Vo
EAOUT
FB
VDRP
IIN
IIN
ISHARE
VDAC
ISHARE
ISHARE
ISHARE
ISHARE
VDAC
RDRP
RFB2
Phase IC
Phase IC
10k
10k
RFB
Rt
Current Sense
Amplifier
Current Sense
Amplifier
Vo
+
-
+
-
CSIN+
CSIN-
CSIN+
CSIN-
9
/30/04
IR3080