ST STPS20L120C User Manual

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Features

■ High junction temperature capability

■ Avalanche capability specified

■ Low forward voltage drop current

■ High frequency operation

■ Insulated package

– TO-220FPAB

Insulating voltage = 1500 V rms Typical package capacitance 12 pF

Description

Dual center tap Schottky rectifier suited for high frequency switch mode power supplies.

Packaged in TO-220AB and TO-220FPAB, this device provides the adaptor designers with an optimized price-performance ratio.

STPS20L120C

Power Schottky rectifier

TO-220AB

STPS20L120CT

Table 1. Device summary

2 x 10 A

F(AV)

120 V

RRM

j(max)

0.55 V

F(typ)

TO-220FPAB

STPS20L120CFP

150 °C

May 2009 Doc ID 15670 Rev 1 1/8

www.st.com

Characteristics STPS20L120C

1 Characteristics

Table 2. Absolute ratings (limiting values, per diode)

Symbol Parameter Value Unit

F(RMS)

F(AV)

FSM

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

Table 3. Thermal parameters

Repetitive peak reverse voltage 120 V

RRM

Forward rms current 20 A

Average forward current, δ = 0.5 Total package 20 A

Surge non repetitive forward current tp = 10 ms Sinusoidal 200 A

Repetitive peak avalanche power tp = 1 µs Tj = 25 °C 8000 W

ARM

Storage temperature range -65 to + 175 °C

stg

Maximum operating junction temperature

dPtot

--------------dTj

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

Rth j a–()

(1)

150 °C

Symbol Parameter Value Unit

th(j-c)

th(c)

Junction to case

Coupling

TO-220AB

TO-220FPAB

Per diode To t al

TO-220AB

To t al

TO-220FPAB 3.2

1.1

4.9

4.1

0.2

When the diodes 1 and 2 are used simultaneously : T

(diode 1) = P(diode 1) x R

Table 4. Static electrical characteristics (per diode)

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

th(j-c)

th(c)

°C/W

Symbol Test conditions Min. Typ. Max. Unit

(1)

Reverse leakage current

(2)

Forward voltage drop

1. Pulse test : tp = 5 ms, δ < 2%

2. Pulse test : tp = 380 µs, δ < 2%

To evaluate the maximum conduction losses use the following equation : P = 0.595 x I

2/8 Doc ID 15670 Rev 1

F(AV)

+ 0.0095 I

F2(RMS)

= 25 °C

= 125 °C - 8 25 mA

= 25 °C

= 125 °C - 0.55 0.605

= 25 °C

= 125 °C - 0.63 0.69

= 25 °C

= 125 °C - 0.72 0.785

= V

RRM

= 5 A

IF = 10 A

= 20 A

- - 120 µA

- - 0.74

- - 0.86

--1

STPS20L120C Characteristics

Figure 1. Average forward power dissipation

vs. average forward current (per diode)

P (W)

F(AV)

0123456789101112

δ=0.05

I (A)

F(AV)

δ=0.1

δ=0.2

δ=0.5

=tp/T

δ=1

Figure 3. Normalized avalanche power

derating vs. pulse duration

P(t)

ARM p

P (1µs)

ARM

0.1

0.01

t (µs)

0.001

0.10.01 1

10 100 1000

Figure 2. Average forward current vs.

ambient temperature (

δ = 0.5, per diode)

I (A)

F(AV)

=tp/T

0 25 50 75 100 125 150

th(j-a)=Rth(j-c)

TO-220AB

=15°C/W

th(j-a)

T (°C)

amb

TO-220FP

Figure 4. Normalized avalanche power

derating vs. junction temperature

P(Tj)

ARM

P (25 °C)

ARM

1.2

0.8

0.6

0.4

0.2

25 50 75 100 125 150

T (°C)

Figure 5. Non repetitive surge peak forward

current vs. overload duration (max. values, per diode) (TO-220AB)

I (A)

180

160

140

120

100

1.E-03 1.E-02 1.E-01 1.E+00

=0.5

t(s)

Figure 6. Non repetitive surge peak forward

current vs. overload duration (max. values, per diode) (TO-220FPAB)

I (A)

120

100

TC=25°C

TC=75°C

TC=125°C

1.E-03 1.E-02 1.E-01 1.E+00

=0.5

t(s)

Doc ID 15670 Rev 1 3/8

TC=25°C

TC=75°C

TC=125°C

Characteristics STPS20L120C

Figure 7. Relative variation of thermal

impedance junction to case vs. pulse duration (TO-220AB)

Z/R

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

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

Single pulse

0.1

0.0

1.E-03 1.E-02 1.E-01 1.E+00

t (s)

Figure 9. Reverse leakage current vs. reverse

voltage applied (typical values, per diode)

I (mA)

1.E+02

1.E+01

1.E+00

1.E-01

1.E-02

1.E-03

0 102030405060708090100110120

Tj=150°C

Tj=125°C

Tj=100°C

Tj=75°C

Tj=50°C

Tj=25°C

V (V)

Figure 8. Relative variation of thermal

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

Z/R

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

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Single pulse

0.0

1.E-03 1.E-02 1.E-01 1.E+00 1.E+01

t (s)

Figure 10. Junction capacitance vs. reverse

voltage applied (typical values, per diode)

C(pF)

1000

100

V (V)

1 10 100 1000

F=1MHz

OSC

Tj=25°C

=30mV

RMS

Figure 11. Forward voltage drop vs. forward current (per diode)

I (A)

200

180

160

140

120

100

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

4/8 Doc ID 15670 Rev 1

Tj=125°C

(Maximum values)

Tj=125°C

(Typical values)

Tj=25°C

(Maximum values)

V (V)

STPS20L120C 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

Table 5. 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

C 1.23 1.32 0.048 0.051

Dia

D 2.40 2.72 0.094 0.107

E 0.49 0.70 0.019 0.027

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

G1 2.40 2.70 0.094 0.106

H2 10 10.40 0.393 0.409

L2 16.4 typ. 0.645 typ.

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

Doc ID 15670 Rev 1 5/8

Package information STPS20L120C

Table 6. TO-220FPAB dimensions

Dimensions

Ref.

Millimeters Inches

Min. Max. Min. Max.

A 4.4 4.6 0.173 0.181

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

F 0.75 1 0.030 0.039

F1 1.15 1.50 0.045 0.059

F2 1.15 1.50 0.045 0.059

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.

L3 28.6 30.6 1.126 1.205

L4 9.8 10.6 0.386 0.417

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

6/8 Doc ID 15670 Rev 1

STPS20L120C Ordering information

3 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STPS20L120CT STPS20L120CT TO-220AB 2.2 g 50 Tube

STPS20L120CFP STPS20L120CFP TO-220FPAB 2.0 g 50 Tube

4 Revision history

Table 8. Document revision history

Date Revision Changes

20-May-2009 1 First issue

Doc ID 15670 Rev 1 7/8

STPS20L120C

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8/8 Doc ID 15670 Rev 1

ST STPS20L120C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table 1. Device summary

1 Characteristics

Table 2. Absolute ratings (limiting values, per diode)

Table 3. Thermal parameters

Table 4. Static electrical characteristics (per diode)

Figure 11. Forward voltage drop vs. forward current (per diode)

2 Package information

Table 5. TO-220AB dimensions

Table 6. TO-220FPAB dimensions

3 Ordering information

Table 7. Ordering information

4 Revision history

Table 8. Document revision history