IR3080 International Rectifier, IR3080 Datasheet - Page 29

• Manufacturer Part Number: IR3080
• Description: XPHASE VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
• Manufacturer: International Rectifier

Control IC Over Temperature Setting Resistors R
Set the temperature threshold at 115 ºC, which corresponds to the IC die temperature of 116 ºC. Calculate the
HOTSET threshold voltage corresponding to the temperature thresholds.
Body Braking Related Resistors R
N/A. The body braking during Dynamic VID is disabled.
IR3086 EXTERNAL COMPONENTS
PWM Ramp Resistor R
Set PWM ramp magnitude V
resistor R
Inductor Current Sensing Capacitor C
Choose C
The bias currents of CSIN+ and CSIN- are 0.25uA and 0.4uA respectively. Calculate resistor R
Over Temperature Setting Resistors R
Use central over temperature setting and set the temperature threshold at 115 ºC, which corresponds the IC die
temperature of 116 ºC. Calculate the HOTSET threshold voltage corresponding to the temperature thresholds.
Pre-slect R
Phase Delay Timing Resistors R
Use central over temperature setting and set the temperature threshold at 115 ºC, which corresponds the IC die
temperature of 116 ºC. Calculate the HOTSET threshold voltage corresponding to the temperature thresholds.
V
V
R
R
R
=
R
R
R
HOTSET
CS
CS
HOTSET
DRP
PWMRMP
HOTSETC
HOTSET
12
+
−
Page 29 of 41
∗
=
=
=
400
. 0
L
C
R
0
2
=
=
CS
2
4 .
FB
25
=
PWMRMP
R
=
*
CS+
. 4
. 4
=
10
L
+
V
HOTSET1
∗
R
∗
73
73
IN
R
=
R
V
R
HOTSET
3
=47nF and calculate R
HOTSETC
L
*
V
CS
*
BIAS
∗
∗
220
_
10
10
BIAS
n
220
f
+
MAX
SW
∗
−
,
−
=
*
−
3
3
R
1
=10.0kΩ,
10
*
−
V
∗
. 0
O
*
*
∗
∗
0
1
10
V
C
47
HOTSET
T
T
V
G
−
25
4 .
∗
J
HOTSET
9
J
PWMRMP
HOTSET
V
−
CS
*
12
/(
PWMRMP
+
∗
+
HOTSET
10
. 0
_
10
. 1
. 1
∗
MIN
47
−
[ln(
241
241
0 .
. 1
9
PWMRMP
33
*
*
=
∗
12
=
10
10
[ln(
=
=
10
=
365
and Capacitor C
−
. 4
−
3
. 4
20
6
3
*
V
PHASE1
. 1
=
73
)
73
8 .
10
IN
6
CS+,
*
35
∗
BBFB
=
6
6
8 .
−
*
*
10
=0.8V. Choose 220pF for PWM ramp capacitor C
2 .
. 0
3
∗
−
10
. 1
)
10
10
−
∗
k
61
. 0
V
V
−
3
79
. 1
CS+
0 .
Ω
. 1
HOTSET1
O
DAC
−
−
91
∗
ln(
*
3
3
79
79
and R
k
and R
. 1
, Choose R
10
Ω
∗
∗
*
12
79
)
10
116
and Resistors R
116
=
−
−
3
−
. 3
−
ln(
=
∗
. 1
3
+
BBDRP
+
57
PHASE2
30
. 7
V
35
and R
. 1
. 1
15
PWMRMP
IN
k
2 .
241
241
Ω
−
HOTSETC1
k
−
=
0
Ω
CS-
V
8 .
. 1
=
=
DAC
HOTSET2
)]
21
. 1
=6.19kΩ
. 1
79
=
79
k
Ω
−
16
V
V
V
CS+
PWMRMP
.
and R
k 1
, Choose R
Ω
and R
, Choose R
HOTSETC2
)]
CS-
HOTSETC1
PWMRMP
=20.0kΩ,
=16.2kΩ
PWMRMP
CS-
, and calculate the
,
9
/30/04
IR3080