Converters with Synchronous Rectification
for Telecom and Industrial Use
l Lead-Free
Benefits
l Very Low R
l Ultra-Low Gate Impedance
l Fully Characterized Avalanche Voltage
(on) at 4.5V V
DS
GS
and Current
ParameterUnits
V
DS
V
GS
@ TC = 25°C
I
D
@ TC = 100°C
I
D
I
DM
PD @TC = 25°C
@TC = 100°C
P
D
T
J
T
STG
Drain-to-Source VoltageV
Gate-to-Source Voltage
Conti n uous Drai n Cur r e nt, V
c
Maximum Power Dissipation W
Maximum Power Dissipation
Linear D er ating Factor W/°C
Operating Junction and°C
Stor ag e Temperat ur e Ra ng e
Soldering Temperature, for 10 seconds
Mount ing torque, 6-32 or M 3 s crew
@ 10V
GS
GS
HEXFET® Power MOSFET
V
DSS
R
DS(on)
30V
D-Pak
IRLR8113
Max.
30
± 20
f
94
67
f
380
89
44
0.59
-55 to + 175
300 (1. 6m m fr o m case)
x
in (1.1 Nxm)
10 lbf
6.0m
max
:
Qg
22nC
I-Pak
IRLU8113
A
R
JC
θ
R
JA
θ
R
JA
θ
Notes through are on page 11
www.irf.com1
ParameterTyp.Max.Units
Junction-to-Case–––1.69
g
Junction-to-Ambient–––110
–––50°C/W
12/7/04
Page 2
IRLR/U8113PbF
S
D
G
BV
V
/∆T
R
m
V
V
/∆T
I
I
Q
Q
Q
Q
Q
QswSwitch Charge (Q
+ Qgd)
Q
t
t
t
t
C
C
C
Avalanche Characteristics
EASSingle Pulse Avalanc h e E n er g y
IARAvalanche Current
EARRepeti ti ve Avalanche Energy
Diode Characterist ics
I
94
I
V
t
Q
t
Static @ TJ = 25°C (unless otherwise specified)
ParameterMin. Typ. Max. Units
DSS
∆Β
DSS
DS(on)
GS(th)
∆
GS(th)
DSS
GSS
gfsForwa r d Transconductan c e74––––––S
g
gs1
gs2
gd
godr
oss
d(on)
r
d(off)
f
iss
oss
rss
Drain-to-Sou r c e Br e akdown Voltage30––––––V
Breakdown Voltage Temp. Coefficient–––21––– mV/°C
J
Stat ic D r ai n- to-Sou rce On-Res i s tance–––4.86.0
–––5.87.4
Gate Thr es hold Voltage1.35–––2.25V
Gate Thr es hold Voltage Coef ficien t–––-5.6––– mV /°C
J
Drain-to-Sou r c e Le akage Cur rent––––––1.0µA
––––––150
Gate-to-Sour c e Forward Lea k age––––––100nA
Gate-to-Sou rce Reverse Leaka ge––––––-100
Total Gate Charge –––2232
Pre-Vth Gate-to-Source Charge–––6.1–––
Post-Vth Gate-to-Source Charge–––1.7–––nC
Gate-to-Drain Char ge–––6.8–––
Gate Cha r ge Ov e r drive–––7.4–––See Fig. 16
gs2
–––8.5–––
Output Charge–––14–––nC
Turn- O n Delay Time–––9.2–––
Rise Time–––3.8–– –
Turn-Off Delay Time–––15–––ns
Fall Time–––10–––
Input Capacitance–––2920–––
Outpu t C ap ac itance–––610–––pF
Reverse Transf er C ap ac itance–––260–––
0.00.51.01.52.02.5
VSD, Source-to-Drain Voltage (V)
+ Cgd, C
+ C
gd
SHORTED
ds
V
GS
= 0V
)
V
(
e
g
a
t
l
o
V
e
c
r
u
o
S
-
o
t
-
e
t
a
G
,
S
G
V
6.0
ID= 12A
5.0
4.0
3.0
2.0
1.0
0.0
051015202530
VDS= 24V
VDS= 15V
Q
Total G ate Charge (nC)
G
Fig 6. Typical Gate Charge vs.
Gate-to-Source Voltage
1000
)
A
(
t
n
e
r
r
100
u
C
e
c
r
u
o
S
-
o
t
-
n
10
i
a
r
D
,
Tc = 25°C
D
I
Tj = 175°C
Single Pulse
1
110100
OPERATION IN THIS AREA
LIMITED BY RDS(on)
VDS, Drain-to-Source Voltage (V)
100µsec
1msec
10msec
Fig 7. Typical Source-Drain Diode
Fig 8. Maximum Safe Operating Area
Forward Voltage
4www.irf.com
Page 5
IRLR/U8113PbF
100
90
Limited By Package
80
)
70
A
(
t
n
60
e
r
r
u
C
50
n
i
a
r
40
D
,
30
D
I
20
10
0
255075100125150175
TC , Case Temper ature (°C)
Fig 9. Maximum Drain Current vs.
Case Temperature
10
2.5
)
V
(
e
g
2.0
a
t
l
o
V
d
l
o
h
s
1.5
e
r
h
t
e
t
a
G
)
h
1.0
t
(
S
G
V
0.5
-75 -50 -25 0 25 50 75 100 125 150 175 200
ID = 250µA
TJ , Temperature ( °C )
Fig 10. Threshold Voltage vs. Temperature
)
C
1
J
h
t
Z
(
e
s
n
0.1
o
p
s
e
R
l
a
m
r
e
0.01
h
T
0.001
1E-0061E-0050.00010.0010.010.11
Notes:
1. Duty factor D =t / t
2. Peak T= Px Z+ T
JDMthJCC
12
P
DM
t
1
t
2
t1 , Rectangular Pulse Duration ( s ec)
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Case
www.irf.com5
Page 6
IRLR/U8113PbF
S
Current Regulator
I
A
V
9
1
V
15V
V
DS
R
G
20V
V
GS
L
D.U.T
I
AS
Ω
0.01
t
p
DRIVER
+
V
DD
-
Fig 12a. Unclamped Inductive Test Circuit
V
(BR)DSS
t
p
AS
Fig 12b. Unclamped Inductive Waveforms
700
)
J
m
(
600
y
g
r
e
n
500
E
e
h
c
n
400
a
l
a
v
A
300
e
s
l
u
P
e
200
l
g
n
i
S
,
100
S
A
E
0
255075100125150175
TOP 8.3A
BOTTOM13A
Starting TJ , Junction Temperature (°C)
Fig 12c. Maximum Avalanche Energy
Vs. Drain Current
L
V
DS
D
I
D
9.4A
V
DD
D.U.T
V
Same Type as D.U.T.
12V
.2µF
V
GS
50KΩ
3mA
.3µF
D.U.T.
Fig 14a. Switching Time Test Circuit
+
V
D
-
DS
0%
GS
Pulse Width < 1µs
Duty Factor < 0.1%
0%
I
G
Current Sampling Resistors
Fig 13. Gate Charge Test Circuit
I
D
GS
t
d(on)tr
t
d(off)tf
Fig 14b. Switching Time Waveforms
6www.irf.com
Page 7
IRLR/U8113PbF
R
V
+
-
Id
Reverse
Recovery
Current
Driver Gate Drive
D.U.T. ISDWaveform
D.U.T. VDSWaveform
Inductor Curent
* V
GS
D.U.T
+
-
R
G
+
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
-
• Low Leakage Inductance
Current Transformer
-
• dv/dt controlled by R
• Driver same type as D.U.T.
• ISD controlled by Duty Factor "D"
• D.U.T. - Device Under Test
G
+
V
DD
e-Applied
oltage
Period
P.W.
Body Diode Forward
Current
di/dt
Diode Recovery
dv/dt
Body Diode Forward Drop
Ripple ≤ 5%
= 5V for Logic Level Devices
D =
P.W.
Period
VGS=10V
V
DD
I
SD
*
Fig 15. Peak Diode Recovery dv/dt Test Circuit for N-Channel
HEXFET® Power MOSFETs
Vds
Vgs
Vgs(th)
Qgs1
Qgs2QgdQgodr
Fig 16. Gate Charge Waveform
www.irf.com7
Page 8
IRLR/U8113PbF
f
P
P
f
)
Power MOSFET Selection for Non-Isolated DC/DC Converters
Control FET
Special attention has been given to the power losses
in the switching elements of the circuit - Q1 and Q2.
Power losses in the high side switch Q1, also called
the Control FET, are impacted by the R
MOSFET, but these conduction losses are only about
one half of the total losses.
Power losses in the control switch Q1 are given
by;
P
= P
loss
This can be expanded and approximated by;
P
loss
conduction
= I
()
rms
⎛
⎜
+ I ×
⎝
+ Qg× Vg× f
()
Q
⎛
+
⎝
This simplified loss equation includes the terms Q
and Q
charge that is included in all MOSFET data sheets.
The importance of splitting this gate-source charge
into two sub elements, Q
Fig 16.
the gate driver between the time that the threshold
voltage has been reached and the time the drain current rises to I
gins to change. Minimizing Q
reducing switching losses in Q1.
put capacitance of the MOSFET during every switching cycle. Figure A shows how Q
parallel combination of the voltage dependant (nonlinear) capacitances Cds and Cdg when multiplied by
the power supply input buss voltage.
which are new to Power MOSFET data sheets.
oss
Q
is a sub element of traditional gate-source
gs2
Q
indicates the charge that must be supplied by
gs2
Q
is the charge that must be supplied to the out-
oss
8www.irf.com
+ P
2
× R
ds(on )
Q
gd
× Vin× f
i
g
oss
×Vin× f
2
at which time the drain voltage be-
dmax
switching
⎞
⎟
⎠
⎞
⎠
and Q
gs1
+ P
+ I ×
+ P
drive
⎛
Q
gs2
⎜
i
⎝
g
, can be seen from
gs2
is a critical factor in
gs2
is formed by the
oss
of the
ds(on)
output
× Vin×
Synchronous FET
The power loss equation for Q2 is approximated
by;
= P
loss
conduction
= I
loss
+ Qg× Vg× f
+
rms
()
⎛
⎜
⎝
*dissipated primarily in Q1.
For the synchronous MOSFET Q2, R
portant characteristic; however, once again the im-
⎞
⎟
portance of gate charge must not be overlooked since
⎠
it impacts three critical areas. Under light load the
MOSFET must still be turned on and off by the control IC so the gate drive losses become much more
significant. Secondly , the output charge Q
verse recovery charge Qrr both generate losses that
are transfered to Q1 and increase the dissipation in
that device. Thirdly, gate charge will impact the
MOSFETs’ susceptibility to Cdv/dt turn on.
gs2
The drain of Q2 is connected to the switching node
of the converter and therefore sees transitions between ground and Vin. As Q1 turns on and of f there is
a rate of change of drain voltage dV/dt which is capacitively coupled to the gate of Q2 and can induce
a voltage spike on the gate that is sufficient to turn
the MOSFET on, resulting in shoot-through current .
The ratio of Qgd/Q
potential for Cdv/dt turn on.
Figure A: Q
+ P
2
× R
ds(on)()
Q
oss
×Vin× f
2
gs1
Characteristic
oss
drive
must be minimized to reduce the
+ P
⎞
⎠
*
output
+ Q
(
× Vin×
rr
ds(on)
oss
is an im-
and re-
Page 9
D-Pak (TO-252AA) Package Outline
9
Dimensions are shown in millimeters (inches)
IRLR/U8113PbF
D-Pak (TO-252AA) Part Marking Information
EXAMPLE:
Note: "P" in assembly line position
www.irf.com9
THIS IS AN IRFR120
WIT H ASSEMBLY
LOT CODE 1234
ASSEMBLED ON WW 16, 1999
IN THE ASSEMBLY LINE "A"
indicates "L ead-F ree"
OR
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT COD E
INTERNATIONAL
RECTIFIER
LOGO
ASSEMBLY
LOT COD E
IRFU120
1234
PART NUMBER
IRFU120
916A
12
34
PART NUMBER
DAT E CODE
P = DESIGNATES LEAD-FREE
YEAR 9 = 1999
W EEK 1 6
A = ASSEMBLY SITE CODE
DAT E CODE
YEAR 9 = 199
W EEK 1 6
LINE A
PRODUCT (OPTIONAL)
Page 10
IRLR/U8113PbF
9
I-Pak (TO-251AA) Package Outline
Dimensions are shown in millimeters (inches)
I-Pak (TO-251AA) Part Marking Information
919A
78
PART NUMBER
DATE CODE
YEAR 9 = 199
WE E K 19
LINE A
EXAMPLE:
THIS IS AN IRFU12 0
WIT H ASS E MB LY
LOT CODE 5678
ASSEMBLED ON WW 19, 1999
IN THE ASSE MBLY LINE "A"
Note: "P" in assembly line
pos ition indicates "L ead-Free"
INTERNATIONAL
RECTIFIER
LOGO
AS S E MB LY
LOT CODE
IRFU120
56
OR
INTERNATIONAL
RECTIFIER
LOGO
ASS E MB L Y
LO T COD E
IRF U120
56 78
10www.irf.com
PA RT NUMBER
DA TE CODE
P = DE S I GNAT ES L E AD-F RE E
PRODUCT (OPTIONAL)
YEAR 9 = 1999
WEEK 19
A = AS S EMBLY S I T E CODE
Page 11
D-Pak (TO-252AA) Tape & Reel Information
TR
)
)
N
1
2
3
Dimensions are shown in millimeters (inches)
TRR
IRLR/U8113PbF
TRL
12.1 ( .476 )
11.9 ( .469 )
OTES :
. CONTROLLING DIMENSION : MILL IMETE R.
. ALL DIMENSIONS ARE SHOW N IN MILLIMETERS ( INCHES ).
. OUTLINE CONFORMS TO EIA-481 & EIA-541.
13 INCH
NOTES :
1. OUTLINE CONFORMS TO EIA-481.
Notes:
Repetitive rating; pulse width limited by
max. junction temperature.
Starting T
I
AS
= 25°C, L = 1.8mH, RG = 25Ω,
J
= 13A.
Pulse width ≤ 400µs; duty cycle ≤ 2%.
16.3 ( .641 )
15.7 ( .619 )
FEED DIRECTION
16.3 ( .641
15.7 ( .619
8.1 ( .318 )
7.9 ( .312 )
16 mm
FEED DIRECTION
Calculated continuous current based on maximum allowable
junction temperature. Package limitation current is 30A.
When mounted on 1" square PCB (FR-4 or G-10 Material).
For recommended footprint and soldering techniques refer to
application note #AN-994.
Data and specifications subject to change without notice.
This product has been designed and qualified for the Industrial market.
Qualification Standards can be found on IR’s Web site.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.12/04
www.irf.com11
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