•

AN604: Calculation of conduction losses in a power rectifier

•

AN4021: Calculation of reverse losses in a power diode

Table 4. Recovery characteristics (per diode)

Symbol

Parameter

Test conditions

Min. Typ. Max. Unit

trr

Reverse recovery time

Tj = 25 °C

IF = 0.5 A, Irr = 0.25 A, IR = 1 A

-

25

ns

IF = 1 A, VR = 30 V,dIF/dt = -50 A/µs

-

35

tfr

Forward recovery time

Tj = 25 °C

IF = 10 A, VFR = 1.1 x VFmax, dIF/dt = 100 A/µs

-

230

ns

VFP

Peak forward voltage

Tj = 25 °C

IF = 10 A, dIF/dt = 100 A/µs

-

3.5

V

IRM

Reverse recovery current

Tj = 125 °C IF = 10 A, VCC = 200 V, dIF/dt = -200 A/µs

-

8

A

S factor Softness factor

-

0.3

-

1.1

Characteristics (curves)

Figure 1. Conduction losses versus average forward

current (per diode)

0

2

4

6

8

10

12

0

2

4

6

8

10

12

14

P1(W)

T

δ=tp/T

tp

δ = 0.05

δ = 1

I

(A)

F(AV)

δ = 0.1

δ = 0.2

δ = 0.5

Figure 2. Forward voltage drop versus forward current

(maximum values, per diode)

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

2.75

3.00

1

10

100

200

I

(A)

FM

V

(V)

FM

T =25°C

j

T =75°C

j

T =125°C

j

Figure 3. Relative variation of thermal impedance junction

to case versus pulse duration (TO-220AB, D²PAK, I²PAK)

1E-3

1E-2

1E-1

1E+0

0.0

0.2

0.4

0.6

0.8

1.0

Z

/R

th(j-c)

th(j-c)

t (s)

p

Single pulse

Figure 4. Relative variation of thermal impedance junction

to case versus pulse duration (TO-220FPAB)

1E-2

1E-1

1E+0

1E+1

0.0

0.2

0.4

0.6

0.8

1.0

Z

/R

th(j-c)

th(j-c)

t (s)

p

Single pulse

STTH2003

Characteristics (curves)

DS1213 - Rev 12

page 3/16