TIG065E8 Flash IGBT Application Notes

Xenon Flash Light
IGBT Application Note
Hyper Device Division
March. 2014
Agenda
1. Operating Precautions
2. Recommended Circuit Example
3. Evaluation Board Data
Agenda
1. Operating Precautions
2. Recommended Circuit Example
3. Evaluation Board Data
Operating Precautions
Please note the followings when you use the devices
because flash IGBTs handle high current.
Please evaluate the following points when designing.
a.
b.
c.
d.
ICP precautions
dv/dt precautions
dv/dt adjustments
Wiring precautions
a. ICP precautions
The ICP, collector current
peak is restricted by VGE,
gate-emitter voltage.
Please use the device within
the ICP-VGE safe operation
area described in each
product’s specification.
Please note that the ICP is
also restricted by the main
condenser capacity.
Operating waveform
Collector Current Peak
ICP
Gate Signal
Collector-Emitter Voltage
VCE
Collector Current
IC
Example: TIG065E8’s ASO
※Left chart shows the ASO
for single-shot pulse.
Considering heat generation,
please use the device with
channel temperature
Tch≦150℃ in continuous
operating
b. dv/dt precautions
Please use the device with 400V/μs or less of dv/dt , inclination of collectoremitter voltage in turn-off section. Using with dv/dt>400V/μs is not guaranteed.
Operating waveform
Expanded waveform in
Turn-off section
Gate Signal
⊿VCE
Collector-Emitter Voltage
VCE
⊿t=100ns
Collector Current
IC
Turn-off section
[Definition of dv/dt]
Max.⊿VCE/⊿t shall be
dv/dt in turn-off section.
c. dv/dt adjustments
Please adjust the gate series resistance RG to keep dv/dt to 400V/μs or less.
There is no restriction for Rg.
Though the dv/dt-Rg dependency differs according to the mount conditions,
for your reference, we provide the dv/dt-Rg dependency graphs in each
product’s specification.
Example:TIG065E8’s dv/dt-Rg dependency graph
Measurement condition VCC=320V,Ic=100A
600
dv/dt[V/usec]
550
500
450
400
350
300
250
200
100
150
200
250
Rg[Ω]
300
350
400
d. Wiring precautions
If the wiring resistance between IGBT’s emitter terminal and GND is high,
there will be rise in emitter terminal potential and lack in actual gate voltage
during high current operation.
This may cause the breakdown of IGBT.
Flash Unit Application Circuit
VCC
Gate Voltage during high
current operation will be:
VGE - IC×RE
Xe
TC
IC
CM
+
IGBT
GND
VDD
Wiring resistance
RE
gate series resistance
Rg
VGE
GND
Agenda
1. Operating Precautions
2. Recommended Circuit Example
3. Evaluation Board Data
Recommended Circuit Example
VCC
①High current
path should be
thick and short
Xe
TC
IC
CM
VDD
+
IG
②Keep low impedance
between IGBT-GND
(3mΩ or less is
recommended)
gate series resistance
Rg
IGBT
GND
VGE
GND
③Place IGBT &
driver near by
VCC
Xe
TC
Recommended Circuit
CM
VDD
+
gate series resistance
Rg
IGBT
GND
GND
Agenda
1. Operating Precautions
2. Recommended Circuit Example
3. Evaluation Board Data
Evaluation Board
TIG065E8
XE+
CM+
XE+
TC+
TC+ TC-
XE-
VDD
VCC
XE-
TRG
CM+
CM-
TIG065E8
82⇒160
TC-
[Conditions]
VCC=300V(MAX320V)
VDD=2.5~4.0V
TRG=VDD
TND724M
CM-
GND
TIG065E8 Measured Data
Pulse width in 30us operation
10us/div
Turn-on expanded waveform
200ns/div
VCM:50V/div
VCM:50V/div
VCE:50V/div
VCE:50V/div
VGE:2V/div
VGE:2V/div
Pw=30us
Turn-off expanded waveform
200ns/div
dv/dt=550V/us at RG=150Ω: This is out
of guarantee. RG change is needed.
Turn-off expanded waveform
200ns/div
dv/dt=350V/us is down at RG=270Ω:
This is the recommended level.
VCE toff
VCE toff
dv/dt=550V/ns
dv/dt=310V/ns
RG=270Ω(Recommended Condition)