IR3084UMTRPBF International Rectifier, IR3084UMTRPBF Datasheet - Page 40
IR3084UMTRPBF
Manufacturer Part Number
IR3084UMTRPBF
Description
IC CTLR XPHASE 28-MLPQ
Manufacturer
International Rectifier
Series
XPhase™r
Datasheet
1.IR3084UMTRPBF.pdf
(47 pages)
Specifications of IR3084UMTRPBF
Package / Case
28-MLPQ
Mounting Type
Surface Mount
Current - Supply
14mA
Voltage - Supply
9.5 V ~ 16 V
Operating Temperature
0°C ~ 100°C
Applications
Processor
Package
28-Lead MLPQ
Circuit
X-Phase Control IC
Switch Freq (khz)
150kHz to 1.0MHz
Pbf
PbF Option Available
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IR3084UMTRPBF
Manufacturer:
IR
Quantity:
470
IR3086 PHASE IC COMPONENTS
PWM Ramp Resistor R
Set the PWM ramp magnitude V
calculate the 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
Equation (20);
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
using Equations (21) and (22);
Page 40 of 47
V
R
R
R
R
CS+
HOTSET
PWMRMP
CS
HOTSET
CS
−
+
=47nF and calculate R
=
=
2
. 0
L
=
0
C
=
=
Choose a standard resistor value, R
25
4 .
=
. 4
CS
R
V
R
12
73
+
∗
L
V
IN
HOTSET
PWMRMP
R
BIAS
*
=
RAMP
∗
∗
CS
10
400*10
220
f
+
−
SW
1
−
=
3
V
∗
and Capacitor C
*
*
∗
V
HOTSET
. 0
using Equation (18);
T
0
10
C
HOTSET
25
4 .
J
PWMRMP
47
PWMRMP
−
3
+
9
CS+
∗
. 1
∗
/(0.47
*
10
10
220*10
241
=
CS+
using Equation (19);
0 .
HOTSET1
−
∗
20
9
*
to 0.8V. Choose 220pF for the PWM ramp capacitor C
=
[ln(V
*
10
and Resistors R
6
*
10
. 4
8 .
10
3
RAMP
73
−
−
−
=
12
3
3
and R
IN
. 1
)
*
6
∗
∗
10
=
79
2 .
−
. 1
[ln(12
V
PWMRMP
10.0kΩ
V
k
−
79
1.30
3
Ω
O
DAC
HOTSET2
∗
,
=
116
)
. 7
−
−
CS+
14
=15.8kΩ.
+
ln(V
1.30)
. 1
choose R
k
and R
Ω
241
IN
−
−
=
V
ln(12
CS−
. 1
DAC
CS−
79
V
−
= 6.19kΩ
−
, choose R
V
1.30
PWMRMP
−
0.8)]
)]
HOTSET1
IR3084U
=
15.8k Ω
=20.0kΩ,
9/14/2005
PWMRMP
CS−
,
using
and