ST ACST6 User Manual

ACST6

Overvoltage protected AC switch

Features

■ Triac with overvoltage protection

■ Low I

■ TO-220FPAB insulated package: 1500 V rms

(< 10 mA)

GT

Benefits

■ Enables equipment to meet IEC 61000-4-5

■ High off-state reliability with planar technology

■ Needs no external overvoltage protection

■ Reduces the power passive component count

■ High immunity against fast transients

described in IEC 61000-4-4 standards

Applications

■ AC mains static switching in appliance and

industrial control systems

■ Drive of medium power AC loads such as:

– Universal motor of washing machine drum
– Compressor for fridge or air conditioner

OUT

G

OUT

COM

TO-220AB

ACST610-8T

OUT

G

COM

TO-220FPAB

ACST610-8FP

OUT

D²PAK

ACST610-8G

ACST610-8R

Figure 1. Functional diagram

OUT

G

OUT

COM

G

OUT

COM

I²PAK

Description

The ACST6 series belongs to the ACS™/ACST
power switch family built with A.S.D.
specific discrete) technology. This high
performance device is suited to home appliances
or industrial systems, and drives loads up to 6 A.

This ACST6 switch embeds a Triac structure and
a high voltage clamping device able to absorb the
inductive turn-off energy and withstand line
transients such as those described in the
IEC 61000-4-5 standards. The ACST610 needs
only low gate current to be activated
(I

< 10 mA) and still shows a high noise

GT

immunity complying with IEC standards such as
IEC 61000-4-4 (fast transient burst test).

July 2010 Doc ID 7297 Rev 10 1/15

®

(application

G

COM

Table 1. Device summary

Symbol Value Unit

I

T(RMS)

V

DRM/VRRM

I

GT

6A

800 V

10 mA

TM: ACS is a trademark of STMicroelectronics.
®: A.S.D. is a registered trademark of
STMicroelectronics

www.st.com

15

Characteristics ACST6

1 Characteristics

Table 2. Absolute ratings (limiting values)

Symbol Parameter Value Unit

TO-220FPAB T

TO-220AB/

2

I

T(RMS)

I

TSM

I

dI/dt

V

P

G(AV)

P

I

GM

T

V

INS(RMS)

On-state rms current (full sine wave)

Non repetitive surge peak on-state current Tj
initial = 25 °C, ( full cycle sine wave)

2

tI2t for fuse selection tp = 10 ms 13 A2s

Critical rate of rise on-state current

= 2 x I

I

G

Non repetitive line peak pulse voltage

PP

GT, (tr

≤ 100 ns)

(1)

Average gate power dissipation Tj = 125 °C 0.1 W

Peak gate power dissipation (tp = 20 µs) Tj = 125 °C 10 W

GM

Peak gate current (tp = 20 µs) Tj = 125 °C 1.6 A

Storage temperature range -40 to +150 °C

stg

T

Operating junction temperature range -40 to +125 °C

j

Maximum lead solder temperature during 10 ms (at 3 mm from plastic case) 260 °C

T

l

Insulation rms voltage

1. According to test described in IEC 61000-4-5 standard and Figure 19.

Table 3. Electrical characteristics

D

PA K / I2PA K

D2PA K w i t h

2

copper

1cm

F = 60 Hz t

F = 50 Hz t

F = 120 Hz T

TO-220FPAB

= 92 °C

c

6

= 106 °C

T

c

= 62 °C 1.5

T

amb

= 16.7 ms 47 A

p

= 20 ms 45 A

p

= 125 °C 100 A/µs

j

Tj = 25 °C 2 kV

1500 V

A

Symbol Test conditions Quadrant T

(1)

I

GT

V

V

I

H

dV/dt

(dI/dt)

V

1. Minimum IGT is guaranteed at 5% of IGT max

V

= 12 V, RL = 33 Ω I - II - III 25 °C MAX. 10 mA

OUT

V

= 12 V, RL = 33 Ω I - II - III 25 °C MAX. 1.0 V

GT

GD

I

I

CL

(2)

L

L

OUT

V

= V

OUT

I

= 500 mA 25 °C MAX. 25 mA

OUT

I

= 1.2 x I

G

I

= 1.2 x I

G

(2)

V

OUT

(2)

(dV/dt)c = 15 V/µs 125 °C MIN. 3.5 A/ms

c

I

= 0.1 mA, t

CL

, RL = 3.3 kΩ I - II - III 125 °C MIN. 0.2 V

DRM

GT

GT

= 67 % V

, gate open 125 °C MIN. 500 V/µs

DRM

= 1 ms 25 °C MIN. 850 V

p

2. For both polarities of OUT pin referenced to COM pin

2/15 Doc ID 7297 Rev 10

j

Val ue Unit

I - III 25 °C MAX. 30 mA

II 25 °C MAX. 40 mA

ACST6 Characteristics

Table 4. Static characteristics

Symbol Test conditions Value Unit

I

= 2.1 A, t

OUT

(1)

V

V

R

I
I

TM

T0

(1)

d

DRM

RRM

(1)

= 8.5 A, t

I

OUT

Threshold voltage Tj = 125 °C MAX. 0.9 V

Dynamic resistance Tj = 125 °C MAX. 80 mΩ

V

= V

OUT

1. For both polarities of OUT pin referenced to COM pin

Table 5. Thermal resistances

Symbol Parameter Value Unit

= 500 µs

p

= 500 µs 1.7

p

Tj = 25 °C MAX.

Tj = 25 °C MAX. 20 µA

/ V

DRM

RRM

= 125 °C MAX. 500 µA

T

j

1.4
V

Rt

h(j-a)

2

copper pad) D2PA K 4 5

R

Junction to ambient (soldered on 1 cm

Junction to case for full cycle sine wave conduction

th(j-c)

Figure 2. Maximum power dissipation versus

rms on-state current

P(W)

Junction to ambient

8

α = 180°

7

6

5

4

3

2

1

0

0123456

180°

I

(A)

T(RMS)

TO-220AB
TO-220FPAB

2

PAK 65

I

60

°C/W

TO-220FPAB 4.25

TO-220AB

2

D

PA K , I2PA K

2.5

°C/W

Figure 3. On-state rms current versus case

temperature (full cycle)

I

(A)

T(RMS)

7

6

5

4

3

2

1

0

0 25 50 75 100 125

TO-220FPAB

TC(°C)

TO-220AB

D²PAK

I²PAK

α

= 180°

Doc ID 7297 Rev 10 3/15

Characteristics ACST6

Figure 4. On-state rms current versus

ambient temperature

Figure 5. Relative variation of thermal

impedance versus pulse duration

(free air convection, full cycle)

I

(A)

T(RMS)

2.5

2.0

1.5

TO-220FPAB

TO220AB

1.0

0.5

0.0

0 25 50 75 100 125

I2PAK

D2PAK with

copper

surface = 1

2

cm

Ta(°C)

α=180°

Figure 6. Relative variation of gate trigger

current (I

) and voltage (VGT)

GT

versus junction temperature

Figure 7. Relative variation of holding

K = [Zth/ Rth]

1.0E+00

Z

th(j-c)

Z

TO-220AB

D²PAK

1.0E-01

I²PAK

TO-220FPAB

1.0E-02

1.0E-03 1.0E-01 1.0E+01 1.0E+03

current (IH) and latching current (IL)
versus junction temperature

th(j-a)

tp(s)

IGT,VGT[Tj] / IGT,VGT[Tj= 25 °C]

3.0

2.5

2.0

1.5

1.0

0.5

0.0

-50 -25 0 25 50 75 100 125

IGTQ3

V Q1-Q2-Q3

GT

IGTQ1-Q2

Figure 8. Surge peak on-state current

versus number of cycles

I

(A)

TSM

50

40

30

20

Repetitive
TC=106 °C

10

0

1 10 100 1000

Non repetitive

Tjinitial = 25 °C

(typical values)

t = 20 ms

One cycle

Number of cycles

Number of cycles

Tj(°C)

IH,IL[Tj] / IH,IL[Tj= 25 °C]

2.5

2.0

1.5

1.0

0.5

0.0

-50 -25 0 25 50 75 100 125

Tj(°C)

(typical values)

I

L

I

H

Figure 9. Non repetitive surge peak on-state

current and corresponding value of

2

I

t versus sinusoidal pulse width

I

(A), I²t (A²s)

TSM

1000

100

10

1

0.01 0.10 1.00 10.00

dl /dt limitation: 100 A / µs

Tjinitial = 25 °C

I

TSM

I²t

tp(ms)

4/15 Doc ID 7297 Rev 10

ACST6 Characteristics

Figure 10. On-state characteristics

(maximum values)

ITM(A)

100

10

Tj= 125 °C

1

012345

Tj= 25 °C

Tjmax:
Vto= 0.90 V
Rd= 80 m

VTM(V)

Ω

Figure 12. Relative variation of static dV/dt

immunity versus junction
temperature (gate open)

dV/dt [Tj] / dV/dt [Tj= 125 °C]

6

5

4

VD=VR= 536 V

Figure 11. Relative variation of critical rate of

decrease of main current (dI/dt)

c

versus junction temperature

(dl/dt)c[Tj] / (dl/dt)c[Tj= 125 °C]

8

7

6

5

4

3

2

1

0

25 50 75 100 125

Tj(°C)

Figure 13. Relative variation of leakage

current versus junction
temperature

I

DRM/IRRM[Tj;VDRM/VRRM

1.0E+00

Different blocking voltages

1.0E-01

V

DRM=VRRM

] / I

DRM/IRRM[Tj

V

DRM=VRRM

= 600 V

= 125 °C; 800 V]

= 800V

3

2

1

0

25 50 75 100 125

Figure 14. Relative variation of clamping

voltage (V

) versus junction

CL

temperature (minimum values)

V[Tj] / V [Tj= 25 °C]

CL CL

1.15

1.10

1.05

1.00

0.95

0.90

0.85

-50 -25 0 25 50 75 100 125

Tj(°C)

Tj(°C)

1.0E-02

1.0E-03

25 50 75 100 125

V

DRM=VRRM

= 200 V

Tj(°C)

Figure 15. Thermal resistance junction to

ambient versus copper surface
under tab

Rth(j-a)(°C/W)

80

70

60

50

40

30

20

10

0

0 5 10 15 20 25 30 35 40

Printed circuit board FR4,
copper thickness = 35 µm

SCU(cm²)

D²PAK

Doc ID 7297 Rev 10 5/15

Application information ACST6

2 Application information

2.1 Typical application description

The ACST6 device has been designed to control medium power load, such as AC motors in
home appliances. Thanks to its thermal and turn off commutation performances, the ACST6
switch is able to drive an inductive load up to 6 A with no turn off additional snubber. It also
provides high thermal performances in static and transient modes such as the compressor
inrush current or high torque operating conditions of an AC motor. Thanks to its low gate
triggering current level, the ACST6 can be driven directly by an MCU through a simple gate
resistor as shown Figure 16 and Figure 17.

Figure 16. Compressor control – typical diagram

Compressor

AC Mains

PTC

ACST

ACST

Power supply

Compressor with integrated e-starter

Electronic

thermostat

Gate

Driver

2

1

3

Rg

Electronic

starter

logical circuitry

Compressor

AC Mains

PTC

ACST

Run

ACST

switch

Rg

Gate

Power supply

Driver

Compressor with external electronic drive

Start

switch

Rg

6/15 Doc ID 7297 Rev 10

ACST6 Application information

Figure 17. Universal drum motor control – typical diagram

Universal motor

Stator

AC Mains

Speed motor

Rotor

ACST

regulation

Vcc

2.2 AC line transient voltage ruggedness

12V

Motor direction
setting

MCU

Rg

MCU

In comparison with standard Triacs, which are not robust against surge voltage, the ACST6
is self-protected against over-voltage, specified by the new parameter V

. The ACST6

CL

switch can safely withstand AC line transient voltages either by clamping the low energy
spikes, such as inductive spikes at switch off, or by switching to the on state (for less than 10
ms) to dissipate higher energy shocks through the load. This safety feature works even with
high turn-on current ramp up.

The test circuit of Figure 18 represents the ACST6 application, and is used to stress the
ACST switch according to the IEC 61000-4-5 standard conditions. With the additional effect
of the load which is limiting the current, the ACST switch withstands the voltage spikes up to
2 kV on top of the peak line voltage. The protection is based on an overvoltage crowbar
technology. The ACST6 folds back safely to the on state as shown in Figure 19. The ACST6
recovers its blocking voltage capability after the surge and the next zero current crossing.
Such a non repetitive test can be done at least 10 times on each AC line voltage polarity.

Doc ID 7297 Rev 10 7/15

Application information ACST6

Figure 18. Overvoltage ruggedness test circuit for resistive and inductive loads for

IEC 61000-4-5 standards

R = 18 , L = 2 µH, Vsurge = 2 kV

Rg = 220ΩΩ

Surge generator

2kV surge

Rgene

Filtering unit

Model of the load

R

L

AC Mains

Figure 19. Typical current and voltage waveforms across the ACST6 during

IEC 61000-4-5 standard test

V

peak=VCL

1.2/50 µs voltage surge

V

0

ACST6

Rg

I

= 120 A

peak

I

8/15 Doc ID 7297 Rev 10

8/20 µs current surge

0

dI/dt = 150 A/µs

ACST6 Ordering information scheme

3 Ordering information scheme

Figure 20. Ordering information scheme

ACS T 6 10 - 8 G TR

AC switch

Topology

T = Triac

On-state rms current

6 = 6 A

Triggering gate current

10 = 10 mA

Repetitive peak off-state voltage

8 = 800 V

Package

FP = TO-220FPAB
T = TO-220AB
R = I²PAK

G = D²PAK

Delivery mode

TR = Tape and reel
Blank = Tube

Doc ID 7297 Rev 10 9/15

Package information ACST6

4 Package information

● Epoxy meets UL94, V0

● Cooling method: by conduction (C)

● Recommended torque value (TO220AB, TO220FPAB): 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 6. 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

H2

Dia

A

C

D 2.40 2.72 0.094 0.107

E 0.49 0.70 0.019 0.027

L2

F2

F1

L5

L6

L9

L4

F

G1

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

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

L4 13 14 0.511 0.551

L5 2.65 2.95 0.104 0.116

G

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

10/15 Doc ID 7297 Rev 10

M 2.6 typ. 0.102 typ.

Diam. 3.75 3.85 0.147 0.151

ACST6 Package information

Table 7. 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

F

G1

G

D

L7

E

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.

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

Doc ID 7297 Rev 10 11/15

Package information ACST6

Table 8. 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 21. Footprint (dimensions in mm)

16.90

10.30

8.90

3.70

5.08

1.30

12/15 Doc ID 7297 Rev 10

ACST6 Package information

Table 9. I2PAK double track dimensions

Dimensions

Ref.

Millimeters Inches

Min. Max. Min. Max.

A

E

L2

L3

L

Cropping
direction

C2

D

A 4.40 4.60 0.173 0.181

A1 2.49 2.69 0.098 0.106

B 0.70 0.93 0.027 0.037

B2 1.14 1.70 0.045 0.067

C 0.45 0.60 0.018 0.024

C2 1.23 1.36 0.048 0.053

A1

G

B2

B

C

D 8.95 9.35 0.352 0.368

E 10 10.40 0.394 0.409

G 4.88 5.28 0.192 0.208

L 16.70 17.5 0.657 0.689

L2 1.27 1.40 0.050 0.055

L3 13.82 14.42 0.544 0.568

Doc ID 7297 Rev 10 13/15

Ordering information ACST6

5 Ordering information

Table 10. Ordering information

Order code Marking Package Weight Base Qty Packing mode

ACST610-8FP

ACST610-8G D2PAK 1.5 g 50 Tube

ACST610-8GTR D

ACST6108

ACST610-8R I

ACST610-8T TO-220AB 1.5 g 50 Tube

6 Revision history

Table 11. Document revision history

Date Revision Changes

Jan-2002 7F Previous issue.

09-May-2005 8 Layout update. No content change.

18-Dec-2009 9

01-Jul-2010 10 Updated Figure 20.

TO-220FPAB 2.4 g 50 Tube

2

PAK 1.5 g 1000 Tape and reel

2

PAK 2.3 g 50 Tube

Document structure and parameter presentation revised for
consistency with other ACST documents. No technical changes.
Order codes updated.

14/15 Doc ID 7297 Rev 10

ACST6

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Doc ID 7297 Rev 10 15/15