Datasheet STPS640C Datasheet (ST)

STPS640C

Power Schottky rectifier

Main product characteristics

I

F(AV)

V

RRM

T

(max) 150° C

j

(max) 0.57 V

V

F

2 x 3 A

40 V

Features and benefits

■ Very small conduction losses

■ Negligible switching losses

■ Extremely fast switching

■ Low forward drop voltage

■ Low capacitance

■ Low thermal resistance

■ Insulated package: TO-220FPAB

Insulating voltage = 2000 V DC
Capacitance = 12 pF

■ Avalanche capability specified

A1

K

A2

K

A2

A1

DPAK

STPS640CB

TO-220AB

STPS640CT

A2

K

A1

A1

A2

K

TO-220FPAB

STPS640CFP

Description

Dual Schottky rectifier suited to Switch Mode
Power Supplies and other Power Converters.

This device is intended for use in low and medium
voltage operation, and particulary, in high
frequency circuitries where low switching losses
are required (free wheeling and polarity
protection).

March 2007 Rev 7 1/9

www.st.com

9

Characteristics STPS640C

1 Characteristics

Table 1. Absolute ratings (limiting values, per diode)

Symbol Parameter Value Unit

V

I

F(RMS)

I

F(AV)

I

I

P

T

dV/dt Critical rate of rise of reverse voltage 10000 V/µs

Table 2. Thermal resistances

Symbol Parameter Value Unit

Repetitive peak reverse voltage 40 V

RRM

RMS forward voltage

Average forward current δ = 0.5

Surge non repetitive forward

FSM

current

Repetitive peak reverse current tp = 2 µs square F = 1 kHz 1 A

RRM

Repetitive peak avalanche power tp = 1 µs Tj = 25° C 1300 W

ARM

Storage temperature range -65 to + 150 ° C

stg

Maximum operating junction temperature 150 ° C

T

j

TO-220AB /TO-220FPAB 10

DPAK 6

TO-220AB T

DPAK T

= 10 ms Sinusoidal 75 A

t

p

= 135° C

c

= 130° C

c

= 120° C

c

A

3ATO-220FPAB T

R

th (j-c)

R

Junction to case

Coupling

)

th(c

TO-220AB / DPAK

TO-220FPAB

Per diode
To t al

Per diode
To t al

TO-220AB 0.5

TO-220FPAB 3

5.5
3

5.5

5.2

°C/W

°C/W

When the diodes 1 and 2 are used simultaneously :

ΔTj(diode 1) = P(diode1) x R

Table 3. Static electrical characteristics (per diode)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

(1)

I

V

1. Pulse test: tp = 380 µs, δ < 2%

Reverse leakage current

R

(1)

Forward voltage drop

F

(Per diode) + P(diode 2) x R

th(j-c)

= 25° C

T

j

= 125° C 2 10 mA

T

j

V

Tj = 25° C IF = 3 A 0.63

= 25° C IF = 6 A 0.84

T

j

= 125° C IF = 3 A 0.5 0.57

T

j

= 125° C IF = 6 A 0.67 0.72

T

j

R

= V

th(c)

100 µA

RRM

To evaluate the conduction losses use the following equation:
P = 0.42 x I

F(AV)

+ 0.050 I

F2(RMS)

V

2/9

STPS640 Characteristics

Figure 1. Average forward power

dissipation versus average
forward current (per diode)

P (W)

F(AV)

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0.00

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

δ = 0.05

δ = 0.1

δ = 0.2

I (A)

F(AV)

δ = 0.5

δ

=tp/T

δ = 1

T

tp

Figure 3. Normalized avalanche power

derating versus pulse duration

P(t)

ARM p

P (1µs)

ARM

1

0.1

0.01

t (µs)

0.001

0.10.01 1

p

10 100 1000

Figure 5. Non repetitive surge peak forward

current versus overload duration.
(Maximum values, per diode)
(TO-220AB / DPAK)

Figure 2. Average forward current versus

ambient temperature
(

δ = 0.5, per diode)

I (A)

F(AV)

4.0

3.5

3.0

2.5

2.0

1.5

δ

=tp/T

T

tp

1.0

0.5

0.0
0 25 50 75 100 125 150

R=R

th(j-a) th(j-c)

T (°C)

amb

TO-220FPAB

R =15°C/W

th(j-a)

TO-220AB / DPAK

Figure 4. Normalized avalanche power

derating versus junction
temperature

P(t)

ARM p

P (25°C)

ARM

1.2

1

0.8

0.6

0.4

0.2

0

25 50 75 100 125 150

T (°C)

j

Figure 6. Non repetitive surge peak forward

current versus overload duration.
(Maximum values, per diode)
(TO-220FPAB)

I (A)

M

45

40

35

30

25

20

15

10

IM

5

0

1E-3 1E-2 1E-1 1E+0

δ=0.5

t

t(s)

T =75°C

C

T =100°C

C

T =135°C

C

I (A)

M

40

35

30

25

20

15

10

IM

5

0
1E-3 1E-2 1E-1 1E+0

δ=0.5

t

t(s)

T =75°C

C

T =100°C

C

T =130°C

C

3/9

Characteristics STPS640C

Figure 7. Relative variation of thermal

transient impedance junction to
case versus pulse duration
(TO-220AB/DPAK)

Z/R

th(j-c) th(j-c)

1.0

0.8

δ = 0.5

0.6

0.4

δ = 0.2

δ = 0.1

0.2

Single pulse

0.0
1E-3 1E-2 1E-1 1E+0

t (s)

p

δ

T

=tp/T

Figure 9. Reverse leakage current versus

reverse voltage applied (typical
values, per diode)

I (A)

R

1E-2

1E-3

T =150°C

j

T =125°C

j

T =100°C

j

Figure 8. Relative variation of thermal

impedance junction to case versus
pulse duration
(TO-220FPAB)

Z/R

th(j-c) th(j-c)

1.0

0.8

0.6

δ = 0.5

0.4

δ = 0.2

δ = 0.1

0.2

t (s)

tp

Single pulse

0.0
1E-3 1E-2 1E-1 1E+0 1E+1

p

Figure 10. Junction capacitance versus

reverse voltage applied (typical
values, per diode)

C(pF)

500

100

δ

=tp/T

T

F=1MHz

V =30mV

OSC RMS

T =25°C

j

tp

1E-4

1E-5

0 5 10 15 20 25 30 35 40

T =75°C

j

V (V)

R

Figure 11. Forward voltage drop versus

forward current (maximum values,
per diode)

I (A)

FM

10.0

T =150°C

j

(typical values)

T =25°C

j

1.0

V (V)

0.1

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

FM

V (V)

10

12 51020 50

R

Figure 12. Thermal resistance junction to

ambient versus copper surface
under tab (Epoxy printed circuit
board FR4, copper thickness:
35 µm)

R (°C/W)

th(j-a)

80

70

60

50

40

30

20

10

0

0 4 8 12 16 20 24 28 32 36 40

S(Cu)(cm²)

4/9

STPS640 Package information

2 Package information

● Epoxy meets UL94, V0

● Cooling method: by conduction (C)

● Recommended torque value: 0.55 Nm

● Maximum torque value: 0.70 Nm

Table 4. TO-220FPAB dimensions

Dimensions

Ref

Millimeters Inches

Min. Max. Min. Max.

A 4.4 4.6 0.173 0.181

A

H

B

B 2.5 2.7 0.098 0.106

D 2.5 2.75 0.098 0.108

E 0.45 0.70 0.018 0.027

Dia

L6

L2

L3

L5

F1

L4

F2

D

L7

F 0.75 1 0.030 0.039

F1 1.15 1.70 0.045 0.067

F2 1.15 1.70 0.045 0.067

G 4.95 5.20 0.195 0.205

G1 2.4 2.7 0.094 0.106

H 10 10.4 0.393 0.409

L2 16 Typ. 0.63 Typ.

G1

F

E

L3 28.6 30.6 1.126 1.205

L4 9.8 10.6 0.386 0.417

G

L5 2.9 3.6 0.114 0.142

L6 15.9 16.4 0.626 0.646

L7 9.00 9.30 0.354 0.366

Dia. 3.00 3.20 0.118 0.126

5/9

Package information STPS640C

Table 5. DPAK dimensions

Dimensions

Ref

A 2.20 2.40 0.086 0.094

E

B2

L2

H

L4

B

G

A1

A

C2

A1 0.90 1.10 0.035 0.043

A2 0.03 0.23 0.001 0.009

B 0.64 0.90 0.025 0.035

R

D

R

C

B2 5.20 5.40 0.204 0.212

C 0.45 0.60 0.017 0.023

C2 0.48 0.60 0.018 0.023

D 6.00 6.20 0.236 0.244

E 6.40 6.60 0.251 0.259

0.60 MIN.

A2

G 4.40 4.60 0.173 0.181

H 9.35 10.10 0.368 0.397

V2

L2 0.80 typ. 0.031 typ.

L4 0.60 1.00 0.023 0.039

V2 0° 8° 0° 8°

Figure 13. Footprint (dimensions in millimeters)

Millimeters Inches

Min. Max. Min. Max.

6.7

6.7 3 3

1.6

2.3

2.3

1.6

6/9

STPS640 Package information

Table 6. TO-220AB dimensions

Dimensions

L2

F2

F1

F

G1

H2

Dia

Ref

Millimeters Inches

Min. Max. Min. Max.

A 4.40 4.60 0.173 0.181

A

C

L5

L6

C 1.23 1.32 0.048 0.051

D 2.40 2.72 0.094 0.107

E 0.49 0.70 0.019 0.027

L7

F 0.61 0.88 0.024 0.034

F1 1.14 1.70 0.044 0.066

F2 1.14 1.70 0.044 0.066

G 4.95 5.15 0.194 0.202

L9

L4

D

G1 2.40 2.70 0.094 0.106

H2 10 10.40 0.393 0.409

L2 16.4 typ. 0.645 typ.

M

E

G

L4 13 14 0.511 0.551

L5 2.65 2.95 0.104 0.116

L6 15.25 15.75 0.600 0.620

L7 6.20 6.60 0.244 0.259

L9 3.50 3.93 0.137 0.154

M 2.6 typ. 0.102 typ.

Diam. 3.75 3.85 0.147 0.151

In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.

7/9

Ordering information STPS640C

3 Ordering information

Ordering type Marking Package Weight Base qty Delivery mode

STPS640CT STPS640CT TO-220AB 2.20 g 50 Tube

STPS640CB S640C DPAK 0.30 g 75 Tube

STPS640CB-TR S640C DPAK 0.30 g 2500 Tape and reel

STPS640CFP STPS640CFP TO-220FPAB 2.08 g 50 Tube

4 Revision history

Date Revision Description of Changes

Aug-2003 6B Last release.

22-Mar-2007 7 Removed ISOWATT package.

8/9

STPS640

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