ST STPS50U100C User Manual

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STPS50U100C

ULVF™ power Schottky rectifier

Features

■ ultralow forward voltage drop

■ high current capability

■ high frequency operation

Description

The STPS50U100C is a dual power Schottky diode rectifier, suited for high frequency switch mode power supplies.

Featuring an ultralow forward voltage (ULVF) drop, this device, packaged in TO-220AB and

PAK, is intended to be used in notebook, game station and desktop adaptors as well as server SMPS. It has been especially designed to help power supply manufacturers meet the recently introduced worldwide efficiency standards.

TO-220AB

STPS50U100CT

Table 1. Device summary

STPS50U100CR

Symbol Value

F(AV)

RRM

(typ) (25 A @ 125 °C) 0.64 V

(max) 150 °C

PAK

2 x 25 A

100 V

TM: ULVF is a trademark of STMicroelectronics

November 2010 Doc ID 16603 Rev 2 1/8

www.st.com

Characteristics STPS50U100C

1 Characteristics

Table 2. Absolute ratings (limiting values per diode at 25 °C, unless otherwise specified)

Symbol Parameter Value Unit

F(RMS)

F(AV)

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

Table 3. Thermal resistance

Repetitive peak reverse voltage 100 V

RRM

Forward rms current 50 A

Average forward current, δ = 0.5

Surge non repetitive forward current tp = 10 ms, half sine-wave 250 A

FSM

Storage temperature range -65 to + 150 °C

stg

Maximum operating junction temperature

Rth(j-a)

dPtot

dTj

(1)

TC = 120 °C

= 105 °C

Per diode Per device

25 50

150 °C

Symbol Parameter Value Unit

th (j-c)

th (c)

Junction to case

Per diode Per device

Coupling 0.45 °C/W

1.3

0.9

°C/W

When the diodes 1 and 2 are used simultaneously:

ΔT

(diode 1) = P(diode1) x R

Table 4. Static electrical characteristics

(Per diode) + P(diode2) x R

th(j-c)

th(c)

Symbol Parameter Tests conditions Min. Typ. Max. Unit

= 25 °C

Reverse leakage current

Forward voltage drop

= 125 °C - 10 - mA

= 25 °C

= 125 °C - 15 40 mA

= 25 °C

= 125 °C - 0.38 -

= 25 °C

Tj = 125 °C - 0.54 -

= 25 °C

= 125 °C - 0.64 0.7

VR = 70 V

= V

RRM

= 5 A

= 15 A

IF = 25 A

To evaluate the conduction losses use the following equation: P = 0.475 x I

-15-µA

-30200µA

-0.48-

-0.58-

-0.670.73

+ 0.009 I

F(AV)

F2(RMS)

2/8 Doc ID 16603 Rev 2

STPS50U100C Characteristics

Figure 1. Average forward power dissipation

versus average forward current (per diode)

(W)

F(AV)

δ = 0.1

0 5 10 15 20 25 30 35

δ = 0.05

δ = 0.2

δ = tp/T

δ = 0.5

δ = 1

F(AV)

(A)

Figure 3. Reverse leakage current versus

reverse voltage applied (typical values, per diode)

IR(mA)

1.E+02

1.E+01

1.E+00

1.E-01

1.E-02

1.E-03 0 102030405060708090100

Tj= 150 °C

Tj= 125 °C

Tj= 100 °C

Tj= 75 °C

Tj= 50 °C

Tj= 25 °C

VR(V)

Figure 5. Relative variation of thermal

impedance junction to case versus pulse duration

th(j-c)/Rth(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-04 1.E-03 1.E-02 1.E-01 1.E+00

tp(s)

Figure 2. Non repetitive surge peak forward

current versus overload duration (maximum values, per diode)

IM(A)

250

225

200

175

150

125

100

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

δ = 0.5

T = 25 °C

T = 75 °C

T = 125 °C

t(s)

Figure 4. Average forward current versus

ambient temperature (δ = 0.5, per diode)

(A)

F(AV)

= R

th(j-a)

δ = tp/T

0 25 50 75 100 125 150

th(j-c)

amb

(°C)

Figure 6. Junction capacitance versus

reverse voltage applied (typical values, per diode)

C(pF)

10000

1000

100

1 10 100

osc

F = 1 MHz

= 30 mV

Tj= 25 °C

RMS

VR(V)

Doc ID 16603 Rev 2 3/8

Application information STPS50U100C

Figure 7. Forward voltage drop versus forward current (per diode)

IFM(A)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Tj= 125 °C

(Maximum value)

Tj= 125 °C

(Typical value)

Tj= 25 °C

(Maximum value)

VFM(V)

2 Application information

It is mandatory to ensure a peak reverse voltage below the V

absolute rating. ST

RRM

recommends the use of an RC clamping snubber circuit in parallel with the STPS50U100C device.

Figure 8. Application schematic

DC/DC input

STPS50U100C

DC/DC output

4/8 Doc ID 16603 Rev 2

STPS50U100C Package information

3 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.

Dia. 3.75 3.85 0.147 0.151

Doc ID 16603 Rev 2 5/8

Package information STPS50U100C

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

Table 6. I2PAK dimensions

Dimensions

Ref.

Millimeters Inches

Min. Max. Min. Max.

A 4.40 4.60 0.173 0.181

A1 2.40 2.72 0.094 0.107

b 0.61 0.88 0.024 0.035

b1 1.14 1.70 0.044 0.067

c 0.49 0.70 0.019 0.028

c2 1.23 1.32 0.048 0.052

D 8.95 9.35 0.352 0.368

e 2.40 2.70 0.094 0.106

e1 4.95 5.15 0.195 0.203

E 10 10.40 0.394 0.409

L 13 14 0.512 0.551

L1 3.50 3.93 0.138 0.155

L2 1.27 1.40 0.050 0.055

6/8 Doc ID 16603 Rev 2

STPS50U100C Ordering information

4 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STPS50U100CT STPS50U100C TO-220AB 2.23 g 50 Tube

STPS50U100CR STPS50U100C I2PAK 1.49 g 50 Tube

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

5 Revision history

Table 8. Document revision history

Date Revision Changes

17-Nov-2009 1 First release.

04-Nov-2010 2 Added trademark statement for UVLF.

Doc ID 16603 Rev 2 7/8

STPS50U100C

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8/8 Doc ID 16603 Rev 2

ST STPS50U100C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table 1. Device summary

1 Characteristics

Table 3. Thermal resistance

Table 4. Static electrical characteristics

Figure 7. Forward voltage drop versus forward current (per diode)

2 Application information

Figure 8. Application schematic

3 Package information

Table 5. TO-220AB dimensions

Table 6. I2PAK dimensions

4 Ordering information

Table 7. Ordering information

5 Revision history

Table 8. Document revision history