2N7637-GA
Normally – OFF Silicon Carbide
Junction Transistor
VDS
=
600 V
RDS(ON)
=
170 mΩ
ID (Tc = 25°C)
=
20 A
hFE (Tc = 25°C) =
Features
Package
RoHS Compliant
225°C maximum operating temperature
Electrically Isolated Base Plate
Gate Oxide Free SiC Switch
Exceptional Safe Operating Area
Excellent Gain Linearity
Compatible with 5 V TTL Gate Drive
Temperature Independent Switching Performance
Low Output Capacitance
Positive Temperature Coefficient of RDS,ON
Suitable for Connecting an Anti-parallel Diode
110
D
G
G
S
D S
TO – 257 (Isolated Base-plate Hermetic Package)
Advantages
Applications
Compatible with Si MOSFET/IGBT Gate Drive ICs
> 20 µs Short-Circuit Withstand Capability
Lowest-in-class Conduction Losses
High Circuit Efficiency
Minimal Input Signal Distortion
High Amplifier Bandwidth
Down Hole Oil Drilling
Geothermal Instrumentation
Solenoid Actuators
General Purpose High-Temperature Switching
Amplifiers
Solar Inverters
Switched-Mode Power Supply (SMPS)
Power Factor Correction (PFC)
Table of Contents
Section I: Absolute Maximum Ratings ...........................................................................................................1
Section II: Static Electrical Characteristics ....................................................................................................2
Section III: Dynamic Electrical Characteristics .............................................................................................2
Section IV: Figures ...........................................................................................................................................3
Section V: Driving the 2N7637-GA ..................................................................................................................5
Section VI: Package Dimensions: ...................................................................................................................8
Section VII: SPICE Model Parameters ............................................................................................................9
Section I: Absolute Maximum Ratings
Parameter
Drain – Source Voltage
Continuous Drain Current
Continuous Gate Current
Symbol
VDS
ID
IGM
Turn-Off Safe Operating Area
RBSOA
Short Circuit Safe Operating Area
SCSOA
Reverse Gate – Source Voltage
Reverse Drain – Source Voltage
Power Dissipation
Operating and Storage Temperature
Dec 2014
VGS
VDS
Ptot
Tj, Tstg
Conditions
VGS = 0 V
TJ = 225°C, TC = 25°C
TVJ = 225°C, IG = 1.25 A,
Clamped Inductive Load
TVJ = 225°C, IG = 1.25 A, VDS = 400 V,
Non Repetitive
TJ = 225°C, TC = 25°C
Values
600
20
1.25
ID,max = 20
@ VDS ≤ VDSmax
Unit
V
A
A
>20
µs
30
40
80
-55 to 225
V
V
W
°C
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A
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2N7637-GA
Section II: Static Electrical Characteristics
Parameter
Symbol
Conditions
min.
Values
typ.
80
50
170
320
440
3.50
3.27
110
80
max.
Unit
A: On State
Drain – Source On Resistance
RDS(ON)
Gate – Source Saturation Voltage
VGS,SAT
DC Current Gain
ID = 7 A, Tj = 25 °C
ID = 7 A, Tj = 175 °C
ID = 7 A, Tj = 220 °C
ID = 10 A, ID/IG = 40, Tj = 25 °C
ID = 10 A, ID/IG = 30, Tj = 175 °C
hFE
VDS = 5 V, ID = 10 A, Tj = 25 °C
VDS = 5 V, ID = 10 A, Tj = 220 °C
IDSS
VR = 600 V, VGS = 0 V, Tj = 25 °C
VR = 600 V, VGS = 0 V, Tj = 175 °C
VR = 600 V, VGS = 0 V, Tj = 220 °C
mΩ
V
B: Off State
Drain Leakage Current
10
40
100
100
400
600
µA
C: Thermal
Thermal resistance, junction - case
RthJC
2.5
°C/W
Section III: Dynamic Electrical Characteristics
Parameter
Symbol
Conditions
min.
Values
typ.
max.
Unit
A: Capacitance and Gate Charge
Input Capacitance
Reverse Transfer/Output Capacitance
Output Capacitance Stored Energy
Effective Output Capacitance,
time related
Effective Output Capacitance,
energy related
Gate-Source Charge
Gate-Drain Charge
Gate Charge - Total
Ciss
Crss/Coss
EOSS
685
24
3.1
pF
pF
µJ
50
pF
Coss,tr
VGS = 0 V, VD = 500 V, f = 1 MHz
VD = 500 V, f = 1 MHz
VGS = 0 V, VD = 500 V, f = 1 MHz
ID = constant, VGS = 0 V, VDS =
0…400 V
Coss,er
VGS = 0 V, VDS = 0…400 V
37
pF
QGS
QGD
QG
VGS = -5…3 V
VGS = 0 V, VDS = 0…400 V
11
20
31
nC
nC
nC
10
30
75
40
35
65
100
10
30
75
60
45
80
125
ns
ns
ns
ns
µJ
µJ
µJ
ns
ns
ns
ns
µJ
µJ
µJ
B: Switching
Turn On Delay Time
Rise Time
Turn Off Delay Time
Fall Time
Turn-On Energy Per Pulse
Turn-Off Energy Per Pulse
Total Switching Energy
Turn On Delay Time
Rise Time
Turn Off Delay Time
Fall Time
Turn-On Energy Per Pulse
Turn-Off Energy Per Pulse
Total Switching Energy
Dec 2014
td(on)
tr
td(off)
tf
Eon
Eoff
Ets
td(on)
tr
td(off)
tf
Eon
Eoff
Ets
Tj = 175 ºC, VDS = 400 V,
ID = 7 A, Inductive Load
Refer to Section V for additional
driving information.
Tj = 225 ºC, VDS = 400 V,
ID = 7 A, Inductive Load
Refer to Section V for additional
driving information.
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2N7637-GA
Section IV: Figures
A: Static Characteristics
Figure 1: Typical Output Characteristics at 25 °C
Figure 2: Typical Output Characteristics at 175 °C
Figure 3: Typical Output Characteristics at 220 °C
Figure 4: Typical Gate – Source Saturation Voltage
Figure 5: Normalized On-Resistance and Current Gain vs.
Temperature
Figure 6: Typical Blocking Characteristics
Dec 2014
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B: Dynamic Characteristics
Figure 7: Capacitance Characteristics
Figure 9: Typical Turn On Energy Losses and Switching
Times vs. Temperature
Dec 2014
Figure 8: Output Capacitance Stored Energy
Figure 10: Typical Turn Off Energy Losses and Switching
Times vs. Temperature
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2N7637-GA
Section V: Driving the 2N7637-GA
The 2N7637-GA is a current controlled SiC transistor which requires a positive gate current for turn-on and to remain in on-state. It may be
driven by different drive topologies depending on the intended application.
Table 1: Estimated Power Consumption and switching frequencies for various Gate Drive topologies.
Gate Drive Power
Switching
Drive Topology
Consumption
Frequency
Simple TTL
High
Low
Constant Current
Medium
Medium
High Speed – Boost Capacitor
Medium
High
High Speed – Boost Inductor
Low
High
Proportional
Lowest
Medium
Pulsed Power
Medium
N/A
A: Simple TTL Drive
The 2N7637-GA may be driven by 5 V TTL logic using a simple current amplification stage. The current amplifier output current must meet or
exceed the steady state gate current, I G,steady, required to operate the 2N7637-GA. An external gate resistor RG, shown in the
Figure 11 topology, sets IG,steady to the required level which is dependent on the SJT drain current I D and DC current gain hFE, RG may be
calculated from the equation below. The value of VEC,sat can be taken from the PNP datasheet, a partial list of high-temperature PNP and NPN
transistors options is given below. High-temperature MOSFETs may also be used in the topology.
Inverting
Current
Boost
Stage
5V
SiC SJT
PNP
TTL
Gate Signal
D
IG,steady
0/5V
TTL i/p
inverted
0/5V
TTL o/p
G
RG
S
NPN
Figure 11: Simple TTL Gate Drive Topology
Table 2: Partial List of High-Temperature BJTs for TTL Gate Driving
Dec 2014
BJT Part Number
Type
Tj,max (°C)
PHPT60603PY
PHPT60603NY
2N2222
2N6730
2N2905
2N5883
2N5885
PNP
NPN
NPN
PNP
PNP
PNP
NPN
175
175
200
200
200
200
200
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2N7637-GA
B: High Speed Driving
For ultra high speed 2N7637-GA switching (tr, tf < 20 ns) while maintaining low gate drive losses the supplied gate current should include a
positive current peak during turn-on, a negative voltage peak during turn-off, and continuous gate current IG to remain on.
An SJT is rapidly switched from its blocking state to on-state, when the necessary gate charge for turn-on, QG, is supplied by a burst of high
gate current until the gate-source capacitance, CGS, and gate-drain capacitance, CGD, are fully charged. Ideally, the burst should terminate
when the drain voltage has fallen to its on-state value in order to avoid unnecessary drive losses. A negative voltage peak is recommended for
the turn-off transition in order to ensure that the gate current is not being supplied under high dV/dt due to the Miller effect. While satisfactory
turn off can be achieved with VGS = 0 V, a negative VGS value may be used in order to speed up the turn-off transition.
B:1: High Speed, Low Loss Drive with Boost Capacitor
The 2N7637-GA may be driven using a High Speed, Low Loss Drive with Boost Capacitor topology in which multiple voltage levels, a gate
resistor, and a gate capacitor are used to provide current peaks at turn-on and turn-off for fast switching and a continuous gate current while in
on-state. As shown in Figure 12, in this topology two gate driver ICs are utilized. An external gate resistor RG is driven by a low voltage driver
to supply the continuous gate current throughout on-state.and a gate capacitor CG is driven at a higher voltage level to supply a high current
peak at turn-on and turn-off. A 3 kV isolated evaluation gate drive board (GA03IDDJT30-FR4) from GeneSiC Semiconductor utilizing this
topology is commercially available for high and low-side driving, its datasheet provides additional details about this drive topology.
VGH
CG
Gate Signal
IG G
VGL
D
Gate
SiC SJT
S
RG
Figure 12: High Speed, Low Loss Drive with Boost Capacitor Topology
B:2: High Speed, Low Loss Drive with Boost Inductor
A High Speed, Low-Loss Driver with Boost Inductor is also capable of driving the 2N7637-GA at high-speed. It utilizes a gate drive inductor
instead of a capacitor to provide the high-current gate current pulses IG,on and IG,off. During operation, inductor L is charged to a specified I G,on
current value then made to discharge IL into the SJT gate pin using logic control of S 1, S2, S3, and S4, as shown in Figure 13. After turn on,
while the device remains on the necessary steady state gate current I G,steady is supplied from source VCC through RG. Please refer to the article
“A current-source concept for fast and efficient driving of silicon carbide transistors” by Dr. Jacek Rąbkowski for additional information on this
driving topology.3
VCC
S1
VCC
S2
L
VEE
S3
SiC SJT
D
G
RG
S4
S
VEE
Figure 13: High Speed, Low-Loss Driver with Boost Inductor Topology
3
– Archives of Electrical Engineering. Volume 62, Issue 2, Pages 333–343, ISSN (Print) 0004-0746, DOI: 10.2478/aee-2013-0026, June 2013
Dec 2014
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2N7637-GA
C: Proportional Gate Current Driving
A proportional gate drive topology may be beneficial for applications in which the 2N7637-GA will operate over a wide range of drain current
conditions to lower the gate drive power consumption. A proportional gate driver relies on instantaneous drain current ID feedback to vary the
steady state gate current IG,steady supplied to the 2N7637-GA.
C:1: Voltage Controlled Proportional Driver
A voltage controlled proportional driver relies on a gate drive integrated circuit to detect the 2N7637-GA drain-source voltage VDS during onstate to sense ID. The integrated circuit will then increase or decrease I G in response to ID. This allows IG and gate drive power consumption to
reduce while ID is low or for IG to increase when ID increases. A high voltage diode connected between the drain and sense protects the
integrated circuit from high-voltage when blocking. A simplified version of this topology is shown in Figure 14. Additional information will be
available in the future at http://www.genesicsemi.com/references/product-notes/.
HV Diode
Sense
Gate Signal
Proportional
Gate Current
Driver
Signal
D
G
Output
IG,steady
SiC SJT
S
Figure 14: Simplified Voltage Controlled Proportional Driver
C:2: Current Controlled Proportional Driver
The current controlled proportional driver relies on a low-loss transformer in the drain or source path to provide feedback of the
2N7637-GA drain current during on-state to supply IG,steady into the gate. IG,steady will increase or decrease in response to I D at a fixed forced
current gain which is set be the turns ratio of the transformer, hforce = ID / IG = N2 / N1. 2N7637-GA is initially tuned-on using a gate current pulse
supplied into an RC drive circuit to allow I D current to begin flowing. This topology allows IG,steady and the gate drive power consumption to
reduce while ID is relatively low or for IG,steady to increase when ID increases. A simplified version of this topology is shown in Figure 15.
Additional information will be available in the future at http://www.genesicsemi.com/references/product-notes/.
N2
SiC SJT
Gate Signal
D
G
S
N3
N1
N2
Figure 15: Simplified Current Controlled Proportional Driver
Dec 2014
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2N7637-GA
Section VI: Package Dimensions:
TO-257
PACKAGE OUTLINE
NOTE
1. CONTROLLED DIMENSION IS INCH. DIMENSION IN BRACKET IS MILLIMETER.
2. DIMENSIONS DO NOT INCLUDE END FLASH, MOLD FLASH, MATERIAL PROTRUSIONS
Revision History
Date
2014/12/12
Revision
6
Comments
Updated Electrical Characteristics
2014/08/23
2014/03/20
5
4
Updated Electrical Characteristics
Updated Gate Drive Section
2014/02/11
2013/12/19
3
2
Updated Electrical Characteristics
Updated Gate Drive Section
2013/11/18
2012/08/24
1
0
Updated Electrical Characteristics
Initial release
Supersedes
Published by
GeneSiC Semiconductor, Inc.
43670 Trade Center Place Suite 155
Dulles, VA 20166
GeneSiC Semiconductor, Inc. reserves right to make changes to the product specifications and data in this document without notice.
GeneSiC disclaims all and any warranty and liability arising out of use or application of any product. No license, express or implied to any
intellectual property rights is granted by this document.
Unless otherwise expressly indicated, GeneSiC products are not designed, tested or authorized for use in life-saving, medical, aircraft
navigation, communication, air traffic control and weapons systems, nor in applications where their failure may result in death, personal
injury and/or property damage.
Dec 2014
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2N7637-GA
Section VII: SPICE Model Parameters
This is a secure document.
Please copy this code from the SPICE model PDF file on our website
(http://www.genesicsemi.com/images/hit_sic/sjt/2N7637-GA_SPICE.pdf) into LTSPICE (version 4) software for simulation of the 2N7637-GA.
*
MODEL OF GeneSiC Semiconductor Inc.
*
*
$Revision:
1.3
$
*
$Date:
12-DEC-2014
$
*
*
GeneSiC Semiconductor Inc.
*
43670 Trade Center Place Ste. 155
*
Dulles, VA 20166
*
*
COPYRIGHT (C) 2014 GeneSiC Semiconductor Inc.
*
ALL RIGHTS RESERVED
*
* These models are provided "AS IS, WHERE IS, AND WITH NO WARRANTY
* OF ANY KIND EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE."
* Models accurate up to 2 times rated drain current.
*
.model 2N7637 NPN
+ IS
9.8338E-48
+ ISE
1.0733E-26
+ EG
3.23
+ BF
130
+ BR
0.55
+ IKF
200
+ NF
1
+ NE
2.
+ RB
7.2
+ IRB
0.002
+ RBM
0.2
+ RE
0.1039
+ RC
0.06188
+ CJC
2.73E-10
+ VJC
3.04
+ MJC
0.448
+ CJE
6.86E-10
+ VJE
2.89
+ MJE
0.466
+ XTI
3
+ XTB
-0.35
+ TRC1 1.90E-2
+ VCEO 600
+ ICRATING
20
+ MFG
GeneSiC_Semiconductor
*
* End of 2N7637-GA SPICE Model
Dec 2014
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