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Partno	Mfg	Dc	Qty	Available	Descript
STTA312B-TR \|STTA312BTR	ST	N/a	20000	avai	TURBOSWITCH

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STTA312B-TR
TURBOSWITCH
STTA312B
November 1999 - Ed: 4A
TURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
MAIN PRODUCT CHARACTERISTICS
SPECIFIC TO THE FOLLOWING OPERATIONS :
SNUBBING OR CLAMPING, DEMAGNETIZA-
TION AND RECTIFICATION
ULTRA-FAST, SOFT RECOVERY
VERY LOW OVERALL POWER LOSSES AND
PARTICULARY LOW FORWARD VOLTAGE
HIGH FREQUENCY OPERATION
HIGH REVERSE VOLTAGE CAPABILITY
FEATURES AND BENEFITS
TURBOSWITCH 1200V drastically cuts losses in
all high voltage operations which require extremely
fast, soft and noise-free power diodes.
Due to their optimized switching performances
they also highly decrease power losses in any
associated switching IGBT or MOSFET in all
"freewheel mode" operations.
They are particularly suitable in motor control
circuitries, or in primary of SMPS as snubber,
clamping or demagnetizing diodes. They are also
suitable for the secondary of SMPS as high voltage
rectifier diodes.
DESCRIPTION
ABSOLUTE RATINGS (limiting values)
TURBOSWITCH is a trademark of STMicroelectronics
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DYNAMIC ELECTRICAL CHARACTERISTICS
THERMAL AND POWER DATA
Test pulses : * tp = 380 μs, δ < 2%
** tp = 5 ms , δ < 2%
STATIC ELECTRICAL CHARACTERISTICS
To evaluate the maximum conduction losses use the following equation :
P = Vto x IF(AV) + rd x IF2 (RMS)
TURN-OFF SWITCHING
TURN-ON SWITCHING
STTA312B
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0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.50
P1(W)
Fig. 1: Conduction losses versus average current.
0.0 0.5 1.0 1.5 2.0 2.5 3.01E-2
1E-1
1E+0
1E+1
3E+1
IFM(A)
Fig. 2: Forward voltage drop versus forward cur-
rent (maximum values).
1E-3 1E-2 1E-1 1E+00.0
Zth(j-c)/Rth(j-c)
Fig. 3: Relative variation of thermal impedance
junction to case versus pulse duration. 10 20304050 6070 8090 1000
IRM(A)
Fig. 4: Peak reverse recovery current versus dIF/dt
(90% confidence). 1020 3040506070 8090 1000.5
1.6 factor
Fig. 6: Softness factor tb/ta versus dIF/dt (typical
values). 10 2030405060 708090 100100
trr(ns)
Fig. 5: Reverse recovery time versus dIF/dt (90%
confidence).
STTA312B
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20 406080 1000VFP(V)
Fig. 8: Transient peak forward voltage versus
dIF/dt (90% confidence). 50 75 100 1250.7
Fig. 7: Relative variation of dynamic parameters
versus junction temperature (reference: Tj=125°C). 20406080 100400
tfr(ns)
Fig. 9: Forward recovery time versus dIF/dt (90%
confidence).
STTA312B
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The 1200V TURBOSWITCHTM series has been
designed to provide the lowest overall power
losses in all frequency or high pulsed current
operations.
In such application (fig. A to D), the way of
calculating the power losses is given below :
APPLICATION DATA
Fig. A : "FREEWHEEL MODE".
STTA312B
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Fig. E : STATIC CHARACTERISTICS.
Conduction losses :
P1 = Vt0 x IF(AV) + Rd x IF2 (RMS)
Reverse losses :
P2 = VR x IR x (1 - δ)
Fig. B : SNUBBER DIODE. Fig. C : DEMAGNETIZING DIODE.
Fig. D : RECTIFIER DIODE.
APPLICATION DATA (Cont’d)
STTA312B
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