Datasheet STPS1545CR Specification

STPS1545C

Power Schottky rectifier

Features

■ very small conduction losses

■ negligible switching losses

■ extremely fast switching

■ avalanche capability specified

Description

Dual center tap Schottky rectifier suited for switch
mode power supply and high frequency DC to DC
converters.

Packaged either in TO-220AB, D
DPAK, this device is especially intended for use in
low voltage, high frequency inverters, free
wheeling and polarity protection applications.

2

PAK, I2PAK, or

A1

A2

A1

TO-220AB

STPS1545CT

K

A2

A1

2

D

PAK

STPS1545CG

K

A2

A2

K

A1

DPAK

STPS1545CB

A2

K

A1

I2PAK

STPS1545CR

Table 1. Device summary

I

F(AV)

V

RRM

T

(max) 175 °C

j

(max) 0.57 V

V

F

2 x 7.5 A

45 V

November 2010 Doc ID 3503 Rev 7 1/10

www.st.com

10

Characteristics STPS1545C

d

-

1 Characteristics

Table 2. Absolute ratings (limiting values)

Symbol Parameter Value Unit

V

I

F(RMS)

I

F(AV)

I

I

I

P

T

Repetitive peak reverse voltage 45 V

RRM

Forward rms current 20 A

Average forward current δ = 0.5 Tc = 157 °C Per diode 7.5 A

Surge non repetitive forward current tp = 10 ms sinusoidal 150 A

FSM

t

= 2 µs square

Peak repetitive reverse current

RRM

Non repetitive peak reverse current tp = 100 µs square 2 A

RSM

Repetitive peak avalanche power tp = 1 µs Tj = 25 °C 2700 W

ARM

Storage temperature range -65 to + 175 °C

stg

T

Maximum operating junction temperature

j

p

F = 1 kHz

(1)

1A

175 °C

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

Ptot

--------------

1. condition to avoid thermal runaway for a diode on its own heatsink

dTj

1

--------------------------

<

Rth j a–()

Table 3. Thermal resistances

Symbol Parameter Value Unit

R

R

th(j-c)

th(c)

Junction to case

Per diode
To t al

Coupling 0.35

3.0

1.7

°C/W

When the diodes 1 and 2 are used simultaneously:

ΔT

(diode 1) = P(diode1) x R

j

Table 4. Static electrical characteristics (per diode)

(Per diode) + P(diode2) x R

th(j-c)

Symbol Parameter Test conditions Min. Typ. Max. Unit

T

= 25 °C

(1)

I

V

1. Pulse test: tp = 380 µs, δ < 2%

Reverse leakage current

R

(1)

Forward voltage drop

F

j

= 125 °C - 5 15 mA

T

j

T

= 125°C IF = 7.5A - 0.5 0.57

j

= 25°C IF = 15 A --0.84

j

= 125 °C IF = 15 A - 0.65 0.72

T

j

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

2/10 Doc ID 3503 Rev 7

F(AV)

+ 0.020 I

F2(RMS)

th(c)

- - 100 µA

=V

V

R

RRM

V T

STPS1545C Characteristics

Figure 1. Average forward power dissipation

versus average forward current (per
diode)

P (W)

F(AV)

6

5

4

3

2

1

0

012345678910

δ = 0.05

δ = 0.1

δ = 0.2

I (A)

F(AV)

δ = 0.5

δ = 1

δ

=tp/T

T

tp

Figure 3. Normalized avalanche power

derating versus pulse duration

P(tp)

ARM

P (1 µs)

ARM

1

0.1

0.01

t (µs)

0.001

0.10.01 1

p

10 100 1000

Figure 2. Average forward current versus

ambient temperature (

δ = 0.5, per

diode)

I (A)

F(AV)

9

R=R

R =15°C/W

th(j-a)

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

8

7

R =40°C/W

δ

=tp/T

th(j-a)

T

tp

T (°C)

amb

6

5

4

3

2

1

0

0 25 50 75 100 125 150 175

Figure 4. Normalized avalanche power

derating versus junction
temperature

P(Tj)

ARM

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 5. Non repetitive surge peak forward

current versus overload duration
(maximum values, per diode)

I (A)

M

120

100

80

T =50°C

60

40

IM

20

0

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

δ=0.5

t

t(s)

C

T =100°C

C

T =150°C

C

Doc ID 3503 Rev 7 3/10

Figure 6. Relative variation of thermal

impedance junction to case versus
pulse duration

Z/R

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

1.0

0.8

0.6

δ = 0.5

0.4

δ

T

=tp/T

δ = 0.2

0.2

δ = 0.1

Single pulse

0.0
1E-4 1E-3 1E-2 1E-1 1E+0

t (s)

p

tp

Characteristics STPS1545C

Figure 7. Reverse leakage current versus

reverse voltage applied (typical
values, per diode)

I (µA)

R

5E+4

T =150°C

1E+4

1E+3

1E+2

1E+1

1E+0

1E-1

0 5 10 15 20 25 30 35 40 45

j

T =125°C

j

T =100°C

j

T =75°C

j

T =50°C

j

T =25°C

j

V (V)

R

Figure 9. Forward voltage drop versus

forward current (high values, per
diode)

I (A)

FM

100.0

T=125°C

j

(typical values)

10.0

T=125°C

j

1.0

0.1

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

maximum values

V (V)

FM

T=25°C

j

maximum values

Figure 8. Junction capacitance versus

reverse voltage applied (typical
values, per diode)

C(pF)

1000

500

200

V (V)

100

12 51020 50

R

F=1MHz

V =30mV

OSC RMS

T =25°C

j

Figure 10. Thermal resistance junction to

ambient versus copper surface
under tab (D

R (°C/W)

th(j-a)

80

70

60

50

40

30

20

10

0

0 5 10 15 20 25 30 35 40

Epoxy printed circuit board
copper thickness = 35 µm

2

PAK )

D²PAK

S (cm²)

cu

Figure 11. Thermal resistance junction to ambient versus copper surface under tab (DPAK)

R (°C/W)

th(j-a)

100

90

80

70

60

50

40

30

20

10

0

0 5 10 15 20 25 30 35 40

4/10 Doc ID 3503 Rev 7

Epoxy printed circuit board
copper thickness = 35 µm

DPAK

S (cm²)

cu

STPS1545C Package information

2 Package information

● Epoxy meets UL94, V0

● Cooling method: by conduction (C)

● Recommended torque value: 0.4 to 0.6 N·m

In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com
ECOPACK

Figure 12. TO-220AB dimensions

®

packages, depending on their level of environmental compliance. ECOPACK®

®

is an ST trademark.

.

Dimensions

Ref

Millimeters Inches

Min. Max. Min. Max.

A 4.40 4.60 0.173 0.181

L2

F2

F1

F

G1

H2

Dia

A

C

L5

L6

C

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

1.23 1.32 0.048 0.051

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.

Dia. 3.75 3.85 0.147 0.151

Doc ID 3503 Rev 7 5/10

Package information STPS1545C

Table 5. D

L2

L

L3

2

PAK dimensions

E

A1

B2

B

G

* FLAT ZONE NO LESSTHAN 2mm

Dimensions

Ref.

Millimeters Inches

Min. Max. Min. Max.

A 4.40 4.60 0.173 0.181

A

A1 2.49 2.69 0.098 0.106

C2

A2 0.03 0.23 0.001 0.009

B 0.70 0.93 0.027 0.037

D

B2 1.14 1.70 0.045 0.067

C 0.45 0.60 0.017 0.024

C2 1.23 1.36 0.048 0.054

C

R

D 8.95 9.35 0.352 0.368

E 10.00 10.40 0.393 0.409

A2

G 4.88 5.28 0.192 0.208

L 15.00 15.85 0.590 0.624

M

*

V2

L2 1.27 1.40 0.050 0.055

L3 1.40 1.75 0.055 0.069

M 2.40 3.20 0.094 0.126

R 0.40 typ. 0.016 typ.

V2 0° 8° 0° 8°

Figure 13. Footprint (dimensions in millimeters)

16.90

10.30

8.90

3.70

5.08

1.30

6/10 Doc ID 3503 Rev 7

STPS1545C Package information

Mounting (soldering) the I2PAK metal slug (heatsink) with alloy, like a surface mount device,
IS NOT PERMITTED. A standard through-hole mounting is mandatory.

Figure 14. I2PAK dimensions

Dimensions

L2

Ref

A

E

c2

A 4.40 4.60 0.173 0.181 A 4.40

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A1 2.49 2.69 0.098 0.106 A1 2.49

b 0.70 0.93 0.028 0.037 b 0.70

D

b1 1.14 1.17 0.044 0.046 b1 1.14

b2 1.14 1.17 0.044 0.046 b2 1.14

L1

L

b1

A1

c 0.45 0.60 0.018 0.024 c 0.45

c2 1.23 1.36 0.048 0.054 c2 1.23

D 8.95 9.35 0.352 0.368 D 8.95

b

e

e1

c

e 2.40 2.70 0.094 0.106 e 2.40

E 10.0 10.4 0.394 0.409 E 10.0

L 13.1 13.6 0.516 0.535 L 13.1

L1 3.48 3.78 0.137 0.149 L1 3.48

L2 1.27 1.40 0.050 0.055 L2 1.27

Doc ID 3503 Rev 7 7/10

Package information STPS1545C

Table 6. DPAK dimensions

Dimensions

E

B2

L2

H

L4

B

G

0.60 MIN.

A1

A2

V2

A

C2

D

R

R

C

Figure 15. Footprint (dimensions in mm)

Ref.

Millimeters Inches

Min. Max. Min. Max.

A 2.20 2.40 0.086 0.094

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

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

G 4.40 4.60 0.173 0.181

H 9.35 10.10 0.368 0.397

L2 0.80 typ. 0.031 typ.

L4 0.60 1.00 0.023 0.039

V2 0° 8° 0° 8°

6.7 3 3

6.7

1.6

2.3

2.3

1.6

8/10 Doc ID 3503 Rev 7

STPS1545C Ordering information

3 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STPS1545CT STPS1545CT TO-220AB 2.23 g 50 Tube

STPS1545CG STPS1545CG D2PAK 1.48 g 50 Tube

2

STPS1545CG-TR STPS1545CG D

STPS1545CR STPS1545CR I

STPS1545CB-TR STPS1545CB DPAK 0.3 g 2500 Tape and reel

PAK 1.48 g 1000 Tape and reel

2

PAK 1.49 g 50 Tube

For the latest information on available order codes see the product pages on www.st.com.

4 Revision history

Table 8. Document revision history

Date Revision Changes

Jul-2003 5F Last release.

21-Mar-2007 6 Removed ISOWATT and TO-220FPAB packages.

03-Nov-2010 7 Added DPAK package.

Doc ID 3503 Rev 7 9/10

STPS1545C

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10/10 Doc ID 3503 Rev 7

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