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STTA1212D
TURBOSWITCH E ULTRA-FAST HIGH VOLTAGE DIODE
TURBOSWITCH is a trademark of STMicroelectronics
November 1999 - Ed: 5B
ULTRA-FAST, SOFT RECOVERY.
VERY LOW OVERALL POWER LOSSES IN
BOTH THE DIODE AND THE COMPANION
TRANSISTOR.
HIGH FREQUENCY AND/OR HIGH PULSED
CURRENT OPERATION.
HIGH REVERSE VOLTAGE CAPABILITY.
FEATURES AND BENEFITSTURBOSWITCH 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 the primary of SMPS as snubber,
clamping or demagnetizing diodes. They are also
suitable for secondary of SMPS as high voltage
rectifier diodes.
DESCRIPTION
MAIN PRODUCT CHARACTERISTICS
ABSOLUTE RATINGS (limiting values)
STTA1212DTURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
1/8
Test pulses : * tp = 380 μs, δ < 2%
** tp = 5 ms , δ < 2%
STATIC ELECTRICAL CHARACTERISTICS
THERMAL AND POWER DATA
DYNAMIC ELECTRICAL CHARACTERISTICS
TURN-OFF SWITCHING
TURN-ON SWITCHING To evaluate the maximum conduction losses use the following equation :
P = Vto x IF(AV) + Rd x IF2 (RMS)
STTA1212D2/8
46 8 10 12 140
P1(W)
Fig. 1: Conduction losses versus average current.0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.50.1
IFM(A)
Fig. 2: Forward voltage drop versus forward cur-
rent (maximum values).
1E-4 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. 100 200 300 400 5000
IRM(A)
Fig. 4: Peak reverse recovery current versus
dIF/dt (90% confidence). 100 200 300 400 5000
trr(ns)
Fig. 5: Reverse recovery time versus dIF/dt (90%
confidence). 100 200 300 400 5000.80
S factor
Fig. 6: Softness factor (tb/ta) versus dIF/dt (typical
values).
STTA1212D3/8
50 75 100 1250.7Fig. 7: Relative variation of dynamic parameters
versus junction temperature (reference Tj=125°C). 100 200 300 400 5000
VFP(V)
Fig. 8: Transient peak forward voltage versusdIF/dt (90% confidence). 100 200 300 400 500100
tfr(ns)
Fig. 9: Forward recovery time versus dIF/dt (90%
confidence).
STTA1212D4/8
Fig. A : "FREEWHEEL" MODE.The 1200V TURBOSWITCH series has been
designed to provide the lowest overall power
losses in all high frequency or high pulsed current
operations. In such applications (Fig A to D),the
way of calculating the power losses is given below :
APPLICATION DATA
STTA1212D5/8
Fig. E: STATIC CHARACTERISTICS
Conduction losses :P1 = Vt0 . IF(AV) + Rd . IF2 (RMS)
Reverse losses :P2 = VR . IR . (1 - δ)
Fig. B : SNUBBER DIODE. Fig. C : DEMAGNETIZING DIODE.
Fig. D : RECTIFIER DIODE.
STATIC & DYNAMIC CHARACTERISTICS . POWER LOSSES .
STTA1212D6/8
