1700V-400mW SiC Normally-on JFET
Rev. B, September 2021
DATASHEET
Description
UF3N170400B7S
UnitedSiC offers the high-performance G3 SiC normally-on JFET
transistors. This series exhibits ultra-low on resistance (RDS(ON)) and
gate charge (QG) allowing for low conduction and switching loss. The
device normally-on characteristics with low RDS(ON) at VGS = 0 V is also
ideal for current protection circuits without the need for active
control, as well as for cascode operation.
Features
D (Tab)
Tab
w Typical on-resistance RDS(on),typ of 400mW
w Voltage controlled
G (1)
1
w Maximum operating temperature of 175°C
w Extremely fast switching not dependent on temperature
KS (2)
7
w Low gate charge
S (3-7)
w Low intrinsic capacitance
w RoHS compliant
Typical applications
w Over Current Protection Circuits
Part Number
UF3N170400B7S
Package
2
D PAK-7L
Marking
UF3N170400B7S
w DC-AC Inverters
w Switch mode power supplies
w Power factor correction modules
w Motor drives
w Induction heating
Datasheet: UF3N170400B7S
Rev. B, September 2021
1
Maximum Ratings
Parameter
Symbol
Test Conditions
Value
Units
AC 1
TC = 25°C
TC = 100°C
TC = 25°C
TC = 25°C
1700
-20 to +3
-30 to +20
6.8
5.1
16
68
175
-55 to 175
V
V
V
A
A
A
W
°C
°C
reflow MSL 1
245
°C
VDS
Drain-source voltage
VGS
Gate-source voltage
Continuous drain current 2
ID
Pulsed drain current 3
Power dissipation
Maximum junction temperature
Operating and storage temperature
IDM
Ptot
TJ,max
TJ,TSTG
Reflow soldering temperature
Tsolder
DC
1. +20V AC rating applies for turn-on pulses 1W.
2. Limited by TJ,max
3. Pulse width tp limited by TJ,max
Thermal Characteristics
Parameter
Thermal resistance, junction-to-case
Datasheet: UF3N170400B7S
Symbol
Test Conditions
RqJC
Rev. B, September 2021
Value
Min
Typ
Max
1.7
2.2
Units
°C/W
2
Electrical Characteristics (TJ = +25°C unless otherwise specified)
Typical Performance - Static
Parameter
Drain-source breakdown voltage
Total drain leakage current
Total gate leakage current
Drain-source on-resistance
Gate threshold voltage
Gate resistance
Datasheet: UF3N170400B7S
Symbol
Test Conditions
BVDS
VGS=-20V, ID=0.3mA
IDSS
IGSS
RDS(on)
VG(th)
RG
Value
Min
Typ
1700
2.2
VDS=1700V,
VGS=-20V, TJ=175°C
9
VGS=-20V, TJ=25°C
0.15
VGS=-20V, TJ=175°C
0.8
VGS=2V, ID=5A,
TJ=25°C
350
f=1MHz, open drain
Rev. B, September 2021
Units
V
VDS=1700V,
VGS=-20V, TJ=25°C
VGS=0V, ID=5A,
TJ=25°C
VGS=2V, ID=5A,
TJ=175°C
VGS=0V, ID=5A,
TJ=175°C
VDS=5V, ID=4.5mA
Max
60
mA
400
6
mA
mA
500
mW
928
1040
-11.3
-9
5
-6.7
V
W
3
Typical Performance - Dynamic
Parameter
Value
Symbol
Test Conditions
Ciss
Coss
Crss
VDS=100V, VGS=-20V
f=100kHz
225
22
18
pF
Coss(er)
VDS=0V to 1200V,
VGS=-20V
11.4
pF
COSS stored energy
Eoss
VDS=1200V, VGS=-20V
8.2
mJ
Total gate charge
Gate-drain charge
Gate-source charge
QG
QGD
QGS
VDS=1200V, ID=5A,
VGS = -18V to 0V
30
17
5
nC
Turn-on delay time
td(on)
Input capacitance
Output capacitance
Reverse transfer capacitance
Effective output capacitance, energy
related
Rise time
Turn-off delay time
Fall time
tr
td(off)
tf
Turn-on energy
EON
Turn-off energy
EOFF
Total switching energy
Turn-on delay time
Rise time
Turn-off delay time
Fall time
ETOTAL
td(on)
tr
td(off)
tf
Turn-on energy
EON
Turn-off energy
EOFF
Total switching energy
Datasheet: UF3N170400B7S
ETOTAL
Min
Typ
Max
Units
5
VDS=1200V, ID=5A, Gate
Driver =-18V to 0V,
RG=1W,
Inductive Load,
FWD: 2x UJ3D1210TS
in series
TJ=25°C
19
9
ns
37
125
38
mJ
163
5
VDS=1200V, ID=5A, Gate
Driver =-18V to 0V,
RG=1W,
Inductive Load,
FWD: 2x UJ3D1210TS
in series,
TJ=150°C
16
8
ns
34
114
31
mJ
145
Rev. B, September 2021
4
10
10
9
9
8
8
Drain Current, ID (A)
Drain Current, ID (A)
Typical Performance Diagrams
7
6
Vgs = 2V
Vgs = 0V
Vgs = -2V
Vgs = -4V
Vgs = -5V
Vgs = -6V
5
4
3
2
1
6
Vgs = 2V
Vgs = 0V
Vgs = -2V
Vgs = -4V
Vgs = -6V
Vgs = -7V
5
4
3
2
1
0
0
0
1
2
3
4
5
6
7
8
9
Drain-Source Voltage, VDS (V)
10
Figure 1. Typical output characteristics at TJ = - 55°C,
tp < 250ms
0
1
2
3
4
5
6
7
8
9
Drain-Source Voltage, VDS (V)
10
Figure 2. Typical output characteristics at TJ = 25°C,
tp < 250ms
10
1.E-03
8
7
6
5
4
Drain Leakage Current, ID (A)
Vgs = 2V
Vgs = 0V
Vgs = -2V
Vgs = -4V
Vgs = -6V
Vgs = -7V
Vgs = -8V
9
Drain Current, ID (A)
7
3
2
1
Tj = 175°C
1.E-04
Tj = 125°C
Tj = 25°C
1.E-05
Tj = -55°C
1.E-06
1.E-07
1.E-08
0
0
1
2 3 4 5 6 7 8 9
Drain-Source Voltage, VDS (V)
Figure 3. Typical output characteristics at TJ = 175°C,
tp < 250ms
Datasheet: UF3N170400B7S
500
10
700 900 1100 1300 1500 1700
Drain-Source Voltage, VDS (V)
Figure 4. Typical drain-source leakage at VGS = -20V
Rev. B, September 2021
5
8
7
100
Drain Current, ID (A)
Capacitance, C (pF)
Ciss
Coss
10
Crss
6
5
4
Tj = -55°C
3
Tj = 25°C
2
Tj = 125°C
1
1
0
500
1000
1500
Drain-Source Voltage, VDS (V)
0
2000
Figure 5. Typical capacitances at f = 100kHz and VGS =
-20V
-10
-8
-6
-4
-2
0
Gate-Source Voltage, VGS (V)
1.6
Tj = 175°C
Tj = 125°C
Tj = 25°C
Tj = -55°C
1.4
On-Resistance, RDS(on) (W)
2.5
2.0
1.5
1.0
0.5
0.0
2
Figure 6. Typical transfer characteristics at VDS = 5V
3.0
On Resistance, RDS_ON (P.U.)
Tj = 175°C
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-75 -50 -25 0 25 50 75 100 125 150 175
Junction Temperature, TJ (°C)
Figure 7. Normalized on-resistance vs. temperature
at VGS = 0V and ID = 5A
Datasheet: UF3N170400B7S
0
1
2
3 4 5 6 7
Drain Current, ID (A)
8
9
10
Figure 8. Typical drain-source on-resistances at VGS =
0V
Rev. B, September 2021
6
16
-2
14
12
-4
EOSS (mJ)
Threshold Voltage, Vth (V)
0
-6
-8
10
8
6
-10
4
-12
2
-14
0
-75 -50 -25 0 25 50 75 100 125 150 175
Junction Temperature, TJ (°C)
Figure 9. Threshold voltage vs. junction temperature
at VDS = 5V and ID = 4.5mA
0
500
1000
1500
Drain-Source Voltage, VDS (V)
2000
Figure 10. Typical stored energy in COSS at VGS = -20V
70
10
60
Drain Current, ID (A)
Power Dissipation, Ptot (W)
80
50
40
30
20
10
0
-75 -50 -25 0
25 50 75 100 125 150 175
10ms
1
100ms
0.1
Datasheet: UF3N170400B7S
DC
1ms
10ms
0.01
1
Case Temperature, TC (°C)
Figure 11. Total power Dissipation
1ms
10
100
1000
Drain-Source Voltage, VDS (V)
Figure 12. Safe operation area at TC =25°C,
Parameter tp
Rev. B, September 2021
7
1.0
Tj = 175°C
Tj = 125°C
Tj = 25°C
Tj = -55°C
1.E-06
Tj = 175°C
Tj = 125°C
0.8
Gate Current, IG (A)
Gate Current, IG (A)
1.E-05
1.E-07
1.E-08
Tj = 25°C
Tj = -55°C
0.6
0.4
0.2
0.0
-20
-15
-10
-5
Gate-Source Voltage, VGS (V)
0
Figure 13. Typical gate leakage at VDS = 0V
0
1
2
3
4
Gate-Source Voltage, VGS (V)
5
Figure 14. Typical gate forward current at VDS = 0V
1
0.1
0.01
D = 0.5
D = 0.3
D = 0.1
D = 0.05
D = 0.02
D = 0.01
Single Pulse
0.001
1.E-06 1.E-05 1.E-04 1.E-03 1.E-02 1.E-01
Pulse Time, tp (s)
Figure 15. Maximum transient thermal impedance
Datasheet: UF3N170400B7S
Gate-Source Voltage, VGS (V)
Thermal Impedance, ZqJC (°C/W)
5
0
-5
-10
-15
-20
0
10
20
30
40
Gate Charge, QG (nC)
Figure 16. Typical gate charge at VDS = 1200V and ID =
5A
Rev. B, September 2021
8
350
VDS = 1200V, VGS = -18V/0V
RG = 1W, FWD: 2x UJ3D1210TS
in series
250
200
Etot
Eon
Eoff
150
100
50
250
200
150
VDS = 1200V, VGS = -18V/0V
ID = 5A, TJ =25°C
FWD: 2x UJ3D1210TS in series
100
50
0
0
0
1
2
3
4
5
Drain Current, ID (A)
6
7
200
0
8
Figure 17. Clamped inductive switching energy vs.
drain current at TJ = 25°C
5
10
15
Gate Resistor RG (W)
20
25
Figure 18. Clamped inductive switching energy vs.
gate resistor RG
Etot
Eon
Eoff
175
Switching Energy (mJ)
Etot
Eon
Eoff
300
Switching Energy (mJ)
Switching Energy (mJ)
300
150
125
100
VGS = -18V/0V, RG = 1W,
FWD: 2x UJ3D1210TS in series
75
50
25
0
0
25
50
75 100 125 150
Junction Temperature, TJ (°C)
175
Figure 19. Clamped inductive switching energy vs.
junction temperature at VDS = 1200V and ID = 5A
Datasheet: UF3N170400B7S
Rev. B, September 2021
9
Disclaimer
UnitedSiC reserves the right to change or modify any of the products
and their inherent physical and technical specifications without prior
notice. UnitedSiC assumes no responsibility or liability for any errors
or inaccuracies within.
UnitedSiC assumes no liability whatsoever relating to the choice,
selection or use of the UnitedSiC products and services described
herein.
Information on all products and contained herein is intended for
description only. No license, express or implied, to any intellectual
property rights is granted within this document.
Datasheet: UF3N170400B7S
Rev. B, September 2021
10