IRF7821PBF [INFINEON]
HEXFET㈢Power MOSFET; HEXFET㈢Power MOSFET
| 型号： | IRF7821PBF |
| 厂家： | 
Infineon |
| 描述： | HEXFET㈢Power MOSFET |
| 文件： | 总10页 (文件大小：286K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PD - 95213A
IRF7821PbF
HEXFET® Power MOSFET
Applications
VDSS
30V
RDS(on) max
Qg(typ.)
9.3nC
l High Frequency Point-of-Load
Synchronous Buck Converter for
Applications in Networking &
9.1mW@VGS= 10V
Computing Systems.
l Lead-Free
A
A
D
1
8
S
Benefits
l Very Low RDS(on) at 4.5V VGS
l Low Gate Charge
l Fully Characterized Avalanche Voltage
and Current
2
3
4
7
S
S
D
6
D
5
G
D
SO-8
Top View
Absolute Maximum Ratings
Parameter
Max.
30
Units
V
VDS
Drain-to-Source Voltage
Gate-to-Source Voltage
Continuous Drain Current, VGS @ 10V
Continuous Drain Current, VGS @ 10V
Pulsed Drain Current
V
± 20
13.6
11
GS
I
I
I
@ TA = 25°C
D
D
@ TA = 70°C
A
100
2.5
DM
Power Dissipation
P
P
@TA = 25°C
@TA = 70°C
W
D
D
Power Dissipation
1.6
Linear Derating Factor
Operating Junction and
0.02
-55 to + 155
W/°C
°C
T
J
T
Storage Temperature Range
STG
Thermal Resistance
Parameter
Junction-to-Drain Lead
Junction-to-Ambient
Typ.
–––
Max.
20
Units
°C/W
Rθ
Rθ
JL
–––
50
JA
Notes through ꢀ are on page 10
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1
05/23/07
IRF7821PbF
Static @ TJ = 25°C (unless otherwise specified)
Parameter
Drain-to-Source Breakdown Voltage
Min. Typ. Max. Units
30 ––– –––
Conditions
VGS = 0V, ID = 250µA
BVDSS
∆Β
V
∆
V
DSS/ TJ
Breakdown Voltage Temp. Coefficient ––– 0.025 ––– V/°C Reference to 25°C, ID = 1mA
RDS(on)
Static Drain-to-Source On-Resistance
–––
–––
1.0
7.0
9.5
–––
9.1
12.5
–––
VGS = 10V, ID = 13A
VGS = 4.5V, ID = 10A
VDS = VGS, ID = 250µA
mΩ
VGS(th)
Gate Threshold Voltage
V
∆
IDSS
VGS(th)
Gate Threshold Voltage Coefficient
Drain-to-Source Leakage Current
–––
–––
–––
–––
–––
22
- 4.9 ––– mV/°C
–––
–––
–––
–––
–––
9.3
2.5
0.8
2.9
3.1
3.7
6.1
6.3
2.7
9.7
7.3
1.0
150
100
-100
–––
14
µA VDS = 24V, VGS = 0V
V
DS = 24V, VGS = 0V, TJ = 125°C
GS = 20V
IGSS
Gate-to-Source Forward Leakage
Gate-to-Source Reverse Leakage
Forward Transconductance
Total Gate Charge
nA
S
V
VGS = -20V
gfs
Qg
VDS = 15V, ID = 10A
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
Qgs1
Pre-Vth Gate-to-Source Charge
Post-Vth Gate-to-Source Charge
Gate-to-Drain Charge
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
V
DS = 15V
nC VGS = 4.5V
D = 10A
See Fig. 16
Qgs2
Qgd
I
Qgodr
Gate Charge Overdrive
Switch Charge (Qgs2 + Qgd)
Qsw
Qoss
td(on)
tr
Output Charge
nC
VDS = 10V, VGS = 0V
Turn-On Delay Time
Rise Time
VDD = 15V, VGS = 4.5V
ID = 10A
td(off)
tf
Turn-Off Delay Time
Fall Time
ns Clamped Inductive Load
Ciss
Coss
Crss
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
––– 1010 –––
VGS = 0V
pF VDS = 15V
ƒ = 1.0MHz
–––
–––
360
110
–––
–––
Avalanche Characteristics
Parameter
Typ.
–––
–––
Max.
44
Units
mJ
Single Pulse Avalanche Energy
EAS
IAR
Avalanche Current
10
A
Diode Characteristics
Parameter
Min. Typ. Max. Units
Conditions
MOSFET symbol
IS
Continuous Source Current
–––
–––
3.1
(Body Diode)
A
showing the
ISM
Pulsed Source Current
–––
–––
100
integral reverse
(Body Diode)
p-n junction diode.
VSD
trr
Diode Forward Voltage
–––
–––
–––
–––
28
1.0
42
35
V
T = 25°C, I = 10A, V = 0V
J S GS
Reverse Recovery Time
Reverse Recovery Charge
ns T = 25°C, I = 10A, VDD = 20V
J F
Qrr
di/dt = 100A/µs
23
nC
2
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IRF7821PbF
100
10
1
100
10
1
VGS
10V
4.5V
3.7V
3.5V
3.3V
3.0V
2.7V
VGS
10V
4.5V
3.7V
3.5V
3.3V
3.0V
2.7V
TOP
TOP
BOTTOM 2.5V
BOTTOM 2.5V
2.5V
2.5V
20µs PULSE WIDTH
Tj = 150°C
20µs PULSE WIDTH
Tj = 25°C
0.1
0.1
1
10
100
0.1
1
10
100
V
, Drain-to-Source Voltage (V)
V
, Drain-to-Source Voltage (V)
DS
DS
Fig 1. Typical Output Characteristics
Fig 2. Typical Output Characteristics
2.0
100.0
10.0
1.0
I
= 13A
D
T
= 150°C
J
V
= 10V
GS
1.5
1.0
0.5
T
= 25°C
J
V
= 15V
DS
20µs PULSE WIDTH
0.1
-60 -40 -20
T
0
20 40 60 80 100 120 140 160
2.0
3.0
4.0
5.0
6.0
, Junction Temperature (°C)
V
, Gate-to-Source Voltage (V)
J
GS
Fig 3. Typical Transfer Characteristics
Fig 4. Normalized On-Resistance
Vs. Temperature
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3
IRF7821PbF
10000
12
10
8
V
= 0V,
f = 1 MHZ
GS
I = 10A
D
V
= 24V
C
= C + C , C SHORTED
DS
VDS= 15V
iss
gs gd ds
C
= C
rss
gd
C
= C + C
oss
ds
gd
1000
100
10
Ciss
Coss
6
Crss
4
2
0
0
5
10
15
20
1
10
100
Q
Total Gate Charge (nC)
G
V
, Drain-to-Source Voltage (V)
DS
Fig 6. Typical Gate Charge Vs.
Fig 5. Typical Capacitance Vs.
Gate-to-Source Voltage
Drain-to-Source Voltage
1000
100
10
100.0
10.0
1.0
OPERATION IN THIS AREA
LIMITED BY R
(on)
DS
T
= 150°C
J
100µsec
1msec
1
T
= 25°C
V
J
10msec
Tc = 25°C
Tj = 150°C
Single Pulse
= 0V
GS
0.1
0.1
0.1
1.0
10.0
100.0
1000.0
0.0
0.5
1.0
1.5
V
, Drain-toSource Voltage (V)
V
, Source-toDrain Voltage (V)
DS
SD
Fig 8. Maximum Safe Operating Area
Fig 7. Typical Source-Drain Diode
Forward Voltage
4
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IRF7821PbF
2.6
2.2
1.8
1.4
1.0
14
12
10
8
I
= 250µA
D
6
4
2
0
-75 -50 -25
0
25
50
75 100 125 150
25
50
75
100
125
150
T
, Temperature ( °C )
T
, Junction Temperature (°C)
J
J
Fig 10. Threshold Voltage Vs. Temperature
Fig 9. Maximum Drain Current Vs.
Case Temperature
100
D = 0.50
0.20
0.10
0.05
10
1
0.02
0.01
0.1
0.01
SINGLE PULSE
( THERMAL RESPONSE )
1E-006
1E-005
0.0001
0.001
0.01
0.1
1
10
100
t
, Rectangular Pulse Duration (sec)
1
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient
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5
IRF7821PbF
30
25
20
15
10
5
100
80
60
40
20
0
I
I
= 13A
D
D
4.5A
8.0A
10A
TOP
BOTTOM
T
= 125°C
= 25°C
J
T
J
0
2.0
4.0
6.0
8.0
10.0
25
50
75
100
125
150
V
, Gate-to-Source Voltage (V)
GS
Starting T , Junction Temperature (°C)
J
Fig 13c. Maximum Avalanche Energy
Fig 12. On-Resistance Vs. Gate Voltage
Vs. Drain Current
LD
VDS
15V
VDD
DRIVER
+
L
V
DS
D.U.T
D.U.T
AS
R
VGS
G
V
DD
-
Pulse Width < 1µs
Duty Factor < 0.1%
I
A
V
20V
GS
Ω
0.01
t
p
Fig 14a. Switching Time Test Circuit
Fig 13a. Unclamped Inductive Test Circuit
V
(BR)DSS
VDS
t
90%
p
10%
VGS
td(on)
td(off)
tf
tr
I
AS
Fig 14b. Switching Time Waveforms
Fig 13b. Unclamped Inductive Waveforms
6
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IRF7821PbF
Driver Gate Drive
P.W.
P.W.
D =
D.U.T
Period
Period
+
-
*
=10V
V
GS
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
• Low Leakage Inductance
Current Transformer
D.U.T. I Waveform
SD
+
-
Reverse
Recovery
Current
Body Diode Forward
Current
di/dt
-
+
D.U.T. V Waveform
DS
Diode Recovery
dv/dt
V
DD
VDD
Re-Applied
Voltage
• dv/dt controlled by RG
RG
+
-
Body Diode
Forward Drop
• Driver same type as D.U.T.
• ISD controlled by Duty Factor "D"
• D.U.T. - Device Under Test
Inductor Curent
I
SD
Ripple
≤ 5%
* VGS = 5V for Logic Level Devices
Fig 15. Peak Diode Recovery dv/dt Test Circuit for N-Channel
HEXFET® Power MOSFETs
Current Regulator
Id
Vds
Same Type as D.U.T.
Vgs
50KΩ
.2µF
.3µF
12V
+
V
DS
D.U.T.
-
Vgs(th)
V
GS
3mA
I
I
Qgs1
Qgs2
Qgd
Qgodr
G
D
Current Sampling Resistors
Fig 17. Gate Charge Waveform
Fig 16. Gate Charge Test Circuit
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7
IRF7821PbF
Power MOSFET Selection for Non-Isolated DC/DC Converters
Synchronous FET
Control FET
The power loss equation for Q2 is approximated
by;
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 Rds(on) of the
MOSFET, but these conduction losses are only about
one half of the total losses.
P = P
+ P + P*
loss
conduction
drive
output
P = Irms 2 × Rds(on)
loss ( )
Power losses in the control switch Q1 are given
by;
+ Q × V × f
(
)
g
g
⎛
⎜
Qoss
⎞
⎠
Ploss = Pconduction+ Pswitching+ Pdrive+ Poutput
+
×V × f + Q × V × f
(
)
in
rr
in
⎝ 2
This can be expanded and approximated by;
*dissipated primarily in Q1.
P
= I 2 × Rds(on )
(
)
loss
rms
For the synchronous MOSFET Q2, Rds(on) is an im-
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 con-
trol IC so the gate drive losses become much more
significant. Secondly, the output charge Qoss and re-
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.
⎛
⎛
Qgd
ig
⎞
Qgs2
ig
⎞
⎟
⎜
⎟
⎜
+ I ×
× V × f + I ×
× V × f
in
in
⎝
⎠
⎝
⎠
+ Q × V × f
(
)
g
g
⎛ Qoss
⎞
⎠
+
×V × f
in
⎝
2
This simplified loss equation includes the terms Qgs2
The drain of Q2 is connected to the switching node
of the converter and therefore sees transitions be-
tween ground and Vin. As Q1 turns on and off there is
a rate of change of drain voltage dV/dt which is ca-
pacitively 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/Qgs1 must be minimized to reduce the
potential for Cdv/dt turn on.
and Qoss which are new to Power MOSFET data sheets.
Qgs2 is a sub element of traditional gate-source
charge that is included in all MOSFET data sheets.
The importance of splitting this gate-source charge
into two sub elements, Qgs1 and Qgs2, can be seen from
Fig 16.
Qgs2 indicates the charge that must be supplied by
the gate driver between the time that the threshold
voltage has been reached and the time the drain cur-
rent rises to Idmax at which time the drain voltage be-
gins to change. Minimizing Qgs2 is a critical factor in
reducing switching losses in Q1.
Qoss is the charge that must be supplied to the out-
put capacitance of the MOSFET during every switch-
ing cycle. Figure A shows how Qoss is formed by the
parallel combination of the voltage dependant (non-
linear) capacitances Cds and Cdg when multiplied by
the power supply input buss voltage.
Figure A: Qoss Characteristic
8
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IRF7821PbF
SO-8 Package Details
Dimensions are shown in milimeters (inches)
SO-8 Part Marking
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9
IRF7821PbF
SO-8 Tape and Reel
Dimensions are shown in milimeters (inches)
TERMINAL NUMBER 1
12.3 ( .484 )
11.7 ( .461 )
8.1 ( .318 )
7.9 ( .312 )
FEED DIRECTION
NOTES:
1. CONTROLLING DIMENSION : MILLIMETER.
2. ALL DIMENSIONS ARE SHOWN IN MILLIMETERS(INCHES).
3. OUTLINE CONFORMS TO EIA-481 & EIA-541.
330.00
(12.992)
MAX.
14.40 ( .566 )
12.40 ( .488 )
NOTES :
1. CONTROLLING DIMENSION : MILLIMETER.
2. OUTLINE CONFORMS TO EIA-481 & EIA-541.
Notes:
Repetitive rating; pulse width limited by
max. junction temperature.
Starting TJ = 25°C, L = 0.87mH
RG = 25Ω, IAS = 10A.
Pulse width ≤ 400µs; duty cycle ≤ 2%.
When mounted on 1 inch square copper board
ꢀ Rθ is measured at TJ approximately 90°C
Note: For the most current drawing please refer to IR website at http://www.irf.com/package/pkhexfet.html
Data and specifications subject to change without notice.
This product has been designed and qualified for the Consumer 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.05/2007
10
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