Datasheet STTH3BCF060 Datasheet (ST)

STTH3BCF060

600 V high voltage rectifier for BC2 topology

Features

■ optimized freewheel diode for BC

(ST patent)

■ low conduction losses

■ high voltage rectifier

■ improves efficiency by up to 2.5% compared to

conventional continuous mode PFC using
standard ultrafast 600 V PN diodes

■ performance efficiency improved by up to 0.5%

compared to 600 V Schottky power diodes with
no reverse recovery charges used in CCM PFC
at 200 kHz

■ provides a cost/performance optimized

solution to meet the 80+ efficiency
requirements

■ supports PFC working up to 300 kHz

■ suitable for PFC up to 400 W

■ compatible with standard PFC controller ICs

2

topology

Description

KA

SMB

STTH3BCF060U

Table 1. Device summary

Symbol Value

I

F(AV)

V

RRM

I

(max) 100 µA

R

T

j

3 A

600 V

175 °C

The STTH3BCF060 is a specific freewheel diode
used in continuous mode power factor correction
working in the BC
especially designed for the dedicated BC

2

topology. This diode has been

2

topology. Therefore, its electrical characteristics
offer the best possible efficiency with a P-N
optimized structured diode. As a result, SMPS
efficiency growth up to 2.5% can be produced at
an optimized cost.

October 2010 Doc ID 17524 Rev 2 1/8

www.st.com

8

Characteristics STTH3BCF060

1 Characteristics

Table 2. Absolute ratings (limiting values)

Symbol Parameter Value Unit

V

I

F(RMS)

I

F(AV)

I

T

Table 3. Thermal resistance

Repetitive peak reverse voltage 600 V

RRM

Forward rms current 10 A

Average forward current δ = 0.5 TL = 55 °C 3 A

Surge non repetitive forward current tp = 10 ms sinusoidal 45 A

FSM

Storage temperature range - 65 to + 175 °C

stg

Maximum operating junction temperature 175 °C

T

j

Symbol Parameter Maximum Unit

R

Table 4. Static electrical characteristics

Junction to lead 25 °C/W

th(j-l)

Symbol Parameter Test conditions Min. Typ. Max. Unit

Reverse leakage

I

R

current

V

Forward voltage drop

F

= 25 °C

T

j

= 150 °C 15 100

T

j

= V

V

R

RRM

Tj = 25 °C

IF = 3 A

= 150 °C 1.0 1.25

T

j

3

1.7

To evaluate the maximum conduction losses use the following equation:
P = 1.03 x I

Table 5. Dynamic electrical characteristics

F(AV)

+ 0.09 I

F2(RMS)

µA

V

Symbol Parameter Test conditions Min. Typ. Max. Unit

Reverse

t

rr

recovery time

Forward

t

fr

recovery time

V

Forward

FP

recovery voltage

T

= 25 °C

j

= 25 °C

T

j

= 1 A, VR = 30 V

I

F

/dt = -50 A/µs

dI

F

I

= 3 A,

F

/dt = 100 A/µs

dI

F

VFR = 1.1 x V

2/8 Doc ID 17524 Rev 2

Fmax

35 ns

100 ns

10 V

STTH3BCF060 Characteristics

0.00.5

0

5

0

53.03.5

0

Figure 1. Conduction losses versus average

current

P(W)

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

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

δ = 1

T

=tp/T

Figure 3. Relative variation of thermal

impedance junction ambient versus

Figure 2. Forward voltage drop versus

forward current

I (A)

FM

50

45

40

35

30

25

20

15

10

tp

5

0

(typical values)

1.

T =150°C

j

1.

T =150°C

j

(maximum values)

V (V)

FM

2.

2.

Figure 4. Peak reverse recovery current

versus dI

/dt (typical values)

F

T =25°C

j

(maximum values)

4.

pulse duration

Z/R

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

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

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

Single pulse

SMB

S = 1cm

Cu

2

t (s)

p

Figure 5. Reverse recovery time versus dI

(typical values)

t (ns)

rr

160
150
140
130
120
110
100

90
80
70
60
50
40
30
20
10

0

0 50 100 150 200 250 300 350 400 450 500

I =2 x I

F F(AV)

dI /dt(A/µs)

F

I=I

F F(AV)

V =400V

R

T =125°C

j

I =0.5 x I

F F(AV)

F

/dt

I (A)

RM

13

V =400V

R

12

T =125°C

j

11

10

9

8

7

6

5

4

3

2

1

0

0 50 100 150 200 250 300 350 400 450 500

I =0.25 x I

F F(AV)

I =0.5 x I

F F(AV)

I=I

F F(AV)

dI /dt(A/µs)

F

I =2 x I

F F(AV)

Figure 6. Reverse recovery charges versus

dI

/dt (typical values)

F

Q (nC)

rr

450

V =400V

R

T =125°C

j

400

I =2 x I

350

300

250

200

150

100

50

0

0 50 100 150 200 250 300 350 400 450 500

F F(AV)

I=I

F F(AV)

I =0.5 x I

F F(AV)

dI /dt(A/µs)

F

Doc ID 17524 Rev 2 3/8

Characteristics STTH3BCF060

0.00.51.01.52.02.53.03.54.04.55.0

Figure 7. Softness factor versus dIF/dt

(typical values)

Figure 8. Relative variations of dynamic

parameters versus junction
temperature

S factor

3.0

I=I

F F(AV)

V =400V

R

T =125°C

j

2.5

2.0

1.5

1.0

0.5

dI /dt(A/µs)

0.0

0 50 100 150 200 250 300 350 400 450 500

F

Figure 9. Transient peak forward voltage

versus dI

V (V)

FP

20

I=I

F F(AV)

18

T =125°C

j

16

14

12

10

8

6

4

2

0

0 20 40 60 80 100 120 140 160 180 200

/dt (typical values)

F

dI /dt(A/µs)

F

Figure 11. Junction capacitance versus

reverse voltage applied
(typical values)

C(pF)

100

10

V (V)

1

1 10 100 1000

R

F=1MHz

V =30mV

OSC RMS

T =25°C

j

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

25 50 75 100 125

Q

RR

S factor

I

RM

I=I

F F(AV)

V =400V

R

Reference:T =125°C

T (°C)

j

Figure 10. Forward recovery time versus dI

(typical values)

t (ns)

fr

200

180

160

140

120

100

80

60

40

20

0

0 20 40 60 80 100 120 140 160 180 200

dI /dt(A/µs)

F

I=I

F F(AV)

V =1.1 x V max.

FR F

T =125°C

j

Figure 12. Thermal resistance junction to

ambient versus copper surface
under lead

R (°C/W)

th(j-a)

110

100

90

80

70

60

50

40

30

20

10

0

Epoxy printed circuit board, FR4
copper thickness = 35 µm

S (cm²)

CU

j

/dt

F

4/8 Doc ID 17524 Rev 2

STTH3BCF060 Application information

2 Application information

Figure 13. Application schematic

L

MAIN

STTH8BC065

L

V

MAINS

Q

STTH3BCF060

2.1 BC2 topology description (ST patent)

No hard switching occurs at turn-on with BC2 topology. Inductor L in series with the power
MOS Q configuration suppresses the switch-on losses. Added winding, coupled with the
main boost inductor L
both recovery current from the STTH8BC065 and damping current towards the power
circuit. Another added winding in series with STTH8BC065 boost diode discharges the
nominal current stored in inductor L flowing through STTH8BC060 diode towards output
bulk capacitor.

These two added phases compared with conventional continuous mode PFC, bring back
the current corresponding to the usual switching losses in the circuit, hence BC
current circuit).

, in series with the STTH3BCF060 freewheel diode brings back

main

STTH8BC060

2

(back

Doc ID 17524 Rev 2 5/8

Package information STTH3BCF060

3 Package information

● Epoxy meets UL94, V0

● Lead-free packages

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 6. SMB dimensions

®

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

®

is an ST trademark.

.

Dimensions

E1

Ref.

Millimeters Inches

Min. Max. Min. Max.

D

A1 1.90 2.45 0.075 0.096

A2 0.05 0.20 0.002 0.008

b 1.95 2.20 0.077 0.087

E

A1

C

L

A2

b

c 0.15 0.40 0.006 0.016

D 3.30 3.95 0.130 0.156

E 5.10 5.60 0.201 0.220

E1 4.05 4.60 0.159 0.181

L 0.75 1.50 0.030 0.059

Figure 14. Footprint (dimensions in mm)

1.62

2.60

5.84

6/8 Doc ID 17524 Rev 2

1.62

2.18

STTH3BCF060 Ordering information

4 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STTH3BCF060U 3BC6 SMB 0.11 g 2500 Tape and reel

5 Revision history

Table 8. Document revision history

Date Revision Changes

18-May-2010 1 First issue.

28-Oct-2010 2 Updated document title. Modified Section 2.1.

Doc ID 17524 Rev 2 7/8

STTH3BCF060

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8/8 Doc ID 17524 Rev 2