ARF774 FAST RECOVERY DIODE
ANSALDO
FINAL SPECIFICATION apr 97 - ISSUE : 01
SWITCHING CHARACTERISTICS
FORWARD RECOVERY VOLTAGE
60
50
40
30
20
10
0
Tj = 125 °C
IF
Tj = 25 °C
VFR
VF
0
200
400
600
800
1000
1200
di/dt [A/µs]
REVERSE RECOVERY CHARGE
Tj = 125 °C
REVERSE RECOVERY CURRENT
Tj = 125 °C
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
3000
2500
2000
1500
1000
500
1000 A
500 A
250 A
1000 A
500 A
250 A
0
0
100
200
300
400
0
100
200
300
400
di/dt [A/µs]
di/dt [A/µs]
IF
d i/d t
ta
ta = Irr / (di/dt)
Softness (s factor) s = tb / ta
Energy dissipation during recovery Er = Vr · (Qrr - Irr ·ta / 2 )
tb = trr - ta
tb
Irr
Vr
POSEICO [ POWER SEMICONDUCTORS ]
