Datasheet ACS108-6SN, ACS108-8SA Specification

ACS108

COM

OUT

COM

G

COM

OUT

G

SOT-223
ACS108-6SN
ACS108-8SN

TO-92
ACS108-6SA
ACS108-8SA

OUT

COM

G

COM Common drive reference to connect

to the mains
OUT Output to connect to the load.
G Gate input to connect to the controller

through gate resistor

Overvoltage protected AC switch (ACS™)

Datasheet - production data

Description

Features

 Enables equipment to meet IEC 61000-4-5

surge with overvoltage crowbar technology

 High noise immunity against static dV/dt and

IEC 61000-4-4 burst

 Needs no external protection snubber or

varistor

 Reduces component count by up to 80% and

Interfaces directly with the micro-controller

 Common package tab connection suppor ts

connection of several alternating current
switches on the same cooling pad

 V

gives headroom before clamping then

CL

crowbar action

Applications

 Alternating current on/off static switching in

appliances and industrial control systems

 Driving low power high inductive or resistive

loads like:
– relay, valve, solenoid, dispenser,
– pump, fan, low power motor, door lock
–lamp

The ACS108 belongs to the AC switch range
(built with A. S. D.

®

technology). This high
performance switch can control a load of up to 0.8
A. The ACS108 switch includes an overvoltage
crowbar structure to absorb the inductive turn-off
energy, and a gate level shifter driver to separate
the digital controller from the main switch. It is
triggered with a negative gate current flowing out
of the gate pin.

Figure 1. Functional diagram

Symbol Value Unit

V

DRM

Table 1. Device summary

I

T(RMS)

, V

I

GT

RRM

0.8 A

600 and 800 V

10 mA

October 2013 DocID6518 Rev 5 1/13

This is information on a product in full production.

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

www.st.com

Characteristics ACS108

1 Characteristics

Table 2. Absolute maximum ratings (T

Symbol Parameter Value Unit

I

T(RMS)

I

TSM

On-state rms current (full sine wave)

Non repetitive surge peak on-state current
(full cycle sine wave, T

2

t I²t Value for fusing tp = 10 ms 1.1 A2s

I

initial = 25 °C)

j

= 25 °C, unless otherwise specified)

amb

T

= 64 °C 0.45 A

TO-92

SOT-223
S = 5 cm

amb

T

= 76 °C

lead

T

= 76 °C

amb

2

T

tab

= 104 °C
F = 60 Hz t = 16.7 ms 13.7
F = 50 Hz t = 20 ms 13

0.8 A

A

dI/dt

V

I

V

P

G(AV)

T

1. According to test described by IEC 61000-4-5 standard and Figure 18

Critical rate of rise of on-state current
I

= 2xIGT, tr  100 ns

G

Non repetitive mains peak mains voltage

PP

Peak gate current tp = 20 µs Tj = 125 °C 1 A

GM

Peak positive gate voltage Tj = 125 °C 10 V

GM

(1)

F = 120 Hz Tj = 125 °C 100 A/µs

Average gate power dissipation Tj = 125 °C 0.1 W
Storage junction temperature range

stg

T

Operating junction temperature range

j

Table 3. Electrical characteristics (Tj = 25 °C, unless otherwise specified)

-40 to +150

-30 to +125

2kV

Symbol Test conditions Quadrant Value Unit

(1)

I

GT

V

GT

V

GD

I

H

I

L

dV/dt

V

OUT

V

OUT

I

= 100 mA Max. 10 mA

OUT

IG = 1.2 x I
V

OUT

V

OUT

= 12 V, RL = 33 

= V

, RL = 3.3 kTj = 125 °C II - III Min. 0.15 V

DRM

GT

= 402 V, gate open, Tj = 125 °C Min. 2000 V/µs
= 536 V, gate open, Tj = 125 °C Min. 400 V/µs

(dI/dt)c Without snubber (15 V/µs), T

= 125 °C, turn-off time  20 ms Min. 2 A/ms

j

II - III Max. 10 mA
II - III Max. 1 V

Max. 25 mA

ICL = 0.1 mA, tp = 1 ms, ACS108-6 Min. 650 V

V

CL

1. Minimum IGT is guaranteed at 10% of IGT max

I

= 0.1 mA, tp = 1 ms, ACS108-8 Min. 850 V

CL

°C

2/13 DocID6518 Rev 5

ACS108 Characteristics

P (W)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

α = 180°

I (A)

T(RMS)

180°

I (A)

T(RMS)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

0 25 50 75 100 125

a =180°

SOT-223

T°C

C

Table 4. Static electrical characteristics

Symbol Parameter and test conditions Value Unit

(1)

V

I

= 1.1 A, tp = 500 µs Tj = 25 °C Max. 1.3 V

TM

Threshold voltage Tj = 125 °C Max. 0.85 V
Dynamic resistance Tj = 125 °C Max. 300 m

V

OUT

= V

DRM

= V

RRM

Tj = 25 °C

Max.

= 125 °C 0.2 mA

T

j

2µA

V
R

I
I

TM

t0
D

DRM
RRM

(1)

(1)

1. For both polarities of OUT referenced to COM

Table 5. Thermal resistance

Symbol Parameter Value Unit

R
R

th (j-l)
th (j-t)

Junction to lead (AC) TO-92 Max. 60
Junction to tab (AC) SOT-223 Max. 25

°C/W

TO-92 Max. 150

R

th (j-a)

Figure 2. Maximum power dissipation versus

Junction to ambient

on-state rms current

S = 5 cm² SOT-223 Max. 60

Figure 3. On-state rms current versus case

temperature (SOT223)

DocID6518 Rev 5 3/13

13

Characteristics ACS108

I (A)

T(RMS)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

0 25 50 75 100 125

Single layer Printed

circuit board FR4

Natural convection

TO-92

SOT-223

a =180

°

Ta°C

K=[Z

th(j-a)/Rth(j-a)

]

0.01

0.10

1.00

1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03

Z

th(j-a)

SOT-223

Copper surface

area = 5cm²

TO-9 2

SOT-223

t (s)

P

0.0

0.5

1.0

1.5

2.0

2.5

3.0

-50 -25 0 25 50 75 100 125

IH,IL[Tj]/IH,IL[Tj=25 °C]

I

H

I

L

Tj(°C)

IGT,VGT[Tj]/IGT,VGT,[Tj=25 °C]

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

-50 -25 0 25 50 75 100 125

IGTQ2

VGTQ2-Q3

IGTQ3

Tj(°C)

I

TSM

(A)

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1 10 100 1000

Non repetitive
T

j

initial=25 °C

TO- 92
Repetitive
T

lead

= 76

°

C

SOT-223

Repetitive

T

tab

= 104°C

One cycle

t=20ms

Number of cycles

I

TSM

(A), I²t (A²s)

1.E-01

1.E+00

1.E+01

1.E+02

1.E+03

0.01 0.10 1.00 10.00

I

TSM

I²t

Sinusoidal pulse,
tp< 10 ms
Tjinitial = 25 °C

(ms)t

p

Figure 4. On-state rms current versus ambient

temperature (free air convection)

Figure 6. Relative variation of holding and

latching current versus junction temperature

Figure 5. Relative variation of thermal

impedance junction to ambient versus pulse

duration

Figure 7. Relative variation of IGT and VGT

versus junction temperature

Figure 8. Surge peak on-state current versus

number of cycles

4/13 DocID6518 Rev 5

Figure 9. Non repetitive surge peak on-state

current for a sinusoidal pulse, and

corresponding value of I²t

ACS108 Characteristics

I

TM

(A)

0.10

1.00

10.00

100.00

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

Tjmax.:

V

to

= 0.85 V

R

d

= 300 m

Ω

Tj=25 °C

Tj=125 °C

VTM(V)

(dI/dt) [T ] / (dI/dt) [T =125 °C]

cc

jj

0.0

0.5

1.0

1.5

2.0

2.5

25 35 45 55 65 75 85 95 105 115 125

T (°C)

j

dV/dt [ T

j

]/dV/dt[T

j

=125°C]

0

1

2

3

4

5

25 50 75 100 125

VD=VR=536V

Tj(°C)

1.0E-03

1.0E-02

1.0E-01

1.0E+00

25 50 75 100 125

I

DRM/IRRM

[Tj;V

DRM/VRRM

]/I

DRM/IRRM

[Tj=125°C;800V]

V

DRM=VRRM

=600 V

V

DRM=VRRM

=800 V

Tj(°C)

(dI/dt)

c

[(dV/dt)

c

] / Specified(dI/dt)

c

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0.1 1.0 10.0 100.0

Tj =125 °C

(dV/dt)c(V/µs)

R

th(j-a)

(°C/W)

0

20

40

60

80

100

120

140

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

SOT-223

SCU(cm²)

Printed circuit board FR4
copper thickness = 35 µm

Figure 10. On-state characteristics (maximum

values)

Figure 12. Relative variation of static dV/dt

immunity versus junction temperature

(1)

Figure 11. Relative variation of critical rate of

decrease of main current versus junction

temperature

Figure 13. Relative variation of leakage current

versus junction temperature

1. VD = VR = 402 V: Typical values above 5 kV/µs. Beyond equipment capability

Figure 14. Relative variation of critical rate of

decrease of main current (di/d t)c versus

(dV/dt)c

Figure 15. Thermal resistance junction to
ambient versus copper surface under tab

(SOT-223)

DocID6518 Rev 5 5/13

13

Alternating current mains switch - basic application ACS108

AC Mains

ACS108

Valve

Power supply

MCU

V

dd

V

ss

Rg

220 Ω

I

T

V

T

2 Alternating current mains switch - basic application

The ACS108 switch is triggered by a negative gate current flowing from the ga te pi n G. The
switch can be driven directly by the digital controller through a resistor as shown in

Figure 16.

Thanks to its overvoltage protection and turn-off commutation performance, the ACS108
switch can drive a small power high inductive load with neither varistor nor additional turn-o ff
snubber.

Figure 16. Typical application schematic

2.1 Protection against overvoltage: the best choice is ACS

In comparison with standard Triacs the ACS108 is over-voltage self-protected, as specified
by the new parameter V
off of very inductive load, and in case of surge voltage that can occur on the electrical
network.

2.1.1 High inductive load switch-off: turn-off overvoltage clamping

With high inductive and low rms current loads the rate of decrease of th e current is very low.
An overvoltage can occur when the gate current is remove d an d the OUT current is lower
than I

As shown in Figure 17, at the end of the last conduction half-cycle, the load current
decreases
off
an overvoltage is created, which is clamped by the ACS
ACS avalanche and decreases linearly to zero. During this time, the voltage across the
switch is limited to the clamping voltage V
load is dissipated in the clamping section that is designed for this purpose. When the ener gy
has been dissipated, the ACS voltage falls back to the mains voltage value (230 V rms,
50 Hz)

.

H

① . The load current reaches the holding current level I

③ . The water valve, as an inductive load (up to 15 H), reacts as a current generator and

⑤ .

. This feature is useful in two operating conditions: in case of turn-

CL

② , and the ACS turns

H

④ . The current flows through the

. The energy stored in the inductance of the

CL

6/13 DocID6518 Rev 5

ACS108 Alternating current mains switch - basic application

1

2

3

4

5

I

H

V

CL

100 µs/div

I

(5 mA/div)

T

V

(200 V/div)

T

I

H

V

CL

V

I

1

2

3

4

5

I

H

V

CL

V

T

I

T

1

2

3

4

5

Load

220 Ω

ACS108

150 Ω

5 µH

+2 kV surge

generator

C

C

OUT

G

COM

Mains
voltage
230 V rms
50 Hz

I

T

V

T

Figure 17. Switching off of a high inductive load - typical clamping capability of

ACS108 (T

= 25 °C)

amb

2.1.2 Alternating current mains transient voltage ruggedness

The ACS108 switch is able to withstand safely the AC mains transients either by clamping
the low energy spikes or by breaking-over when subjected to high energy shocks, even with
high turn-on current rises.

The test circuit shown in Figure 18 is representative of the final ACS108 application, and is
also used to test the AC switch according to th e IEC 61000-4-5 st andard conditions. Thanks
to the load limiting the current, the ACS108 switch withstands the voltage spikes up to 2 kV
above the peak mains voltage. The protection is based on an overvoltage crowbar
technology. Actually, the ACS108 breaks over safely as shown in Figure 19. The ACS108
recovers its blocking voltage capability after the surge (switch off back at the next zero
crossing of the current).

Such non-repetitive tests can be done 10 times on each AC mains voltage polarity.

Figure 18. Overvoltage ruggedness t est circuit f or resistiv e and inductive loads , T

= 25 °C (

conditions equivalent to IEC 61000-4-5 standard)

amb

DocID6518 Rev 5 7/13

13

Alternating current mains switch - basic application ACS108

IT(4 A/div)

V

T

(200 V/div)

I

T max

= 17.2 A

dIT/dt = 1.8 A/µs

500 ns/div

Figure 19. Typical current and volt age waveforms across the ACS108 (+2 kV surge,

IEC 61000-4-5 standard)

8/13 DocID6518 Rev 5

ACS108 Package information

A

F

C

B

a

DE

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

®

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

®

is an ST trademark.

Figure 20. TO-92 dimension definitions

Ref

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

A1.35 0.053
B 4.70 0.185
C2.54 0.100
D 4.40 0.173
E 12.70 0.500

Table 6. TO-92 dimension values

Dimensions

Millimeters Inches

F 3.70 0.146
a 0.50 0.019

DocID6518 Rev 5 9/13

13

Package information ACS108

A

A1

e1

D

B1

H

E

e

1243

B

V

c

3.25

1.32

7.80

5.16

1.32

2.30 0.95

Figure 21. SOT-223 dimension definitions

Table 7. SOT-223 dimension values

Dimensions

Ref.

Millimeters Inches

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

A 1.80 0.071

A1 0.02 0.10 0.001 0.004

B 0.60 0.70 0.85 0.024 0.027 0.033

B1 2.90 3.00 3.15 0.114 0.118 0.124

c 0.24 0.26 0.35 0.009 0.010 0.014

(1)

D

6.30 6.50 6.70 0.248 0.256 0.264

e 2.3 0.090

e1 4.6 0.181

(1)

E

3.30 3.50 3.70 0.130 0.138 0.146
H 6.70 7.00 7.30 0.264 0.276 0.287
V10° max

1. Do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm (0.006inches)

Figure 22. SOT-223 footprint (dimensions in mm)

10/13 DocID6518 Rev 5

ACS108 Ordering information

ACS 1 08 - 6 S A -TR

AC switch series

Number of switches

Current

Voltage

Sensitivity

Package

Packing

08 = 0.8 A rms

6 = 600 V
8 = 800 V

S = 10 mA

A = TO-92
N = SOT-223

TR = Tape and reel 7” (SOT-223, 1000 pieces) 13” (TO-92, 2000 pieces)
AP = Ammopack (TO-92, 2000 pieces)
Blank = (TO-92, 2500 pieces)bulk

4 Ordering information

Figure 23. Ordering information scheme

Table 8. Ordering information

Order code Marking Package Weight Base Qty Delivery mode

ACS108-6SA

ACS108-6SA-TR TO-92 0.2 g 2000 Tape and reel

ACS1 086SA

TO-92 0 .2 g 2500 Bulk

ACS108-6SA-AP TO-92 0.2 g 2000 Ammopack
ACS108-6SN-TR ACS 108 6SN SOT-223 0.11 g 1000 T ape and reel

ACS108-8SA
ACS108-8SA-TR TO-92 0.2 g 2000 Tape and reel
ACS108-8SA-AP TO-92 0.2 g 2000 Ammopack

ACS1 088SA

TO-92 0 .2 g 2500 Bulk

ACS108-8SN-TR ACS 108 8SN SOT-223 0.11 g 1000 T ape and reel

DocID6518 Rev 5 11/13

13

Revision history ACS108

5 Revision history

Date Revision Changes

Apr_2004 1

21-Jun-2005 2 Marking information updated from ACSxxxx to ACS1xxx.

11-Jul-2012 3 Removed 500 V devices and added 600 V and 800 V devices.

27-Sep-2013 4 Corrected typographical error in Figure 4.

31-Oct-2013 5 Corrected character formatting issues in Section 2.1.1.

Table 9. Document revision history

Initial release. This datasheet covers order codes previously
described in the datasheet for ACS108-6S, Doc ID 11962, Rev 3
December 2010.

12/13 DocID6518 Rev 5

ACS108

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DocID6518 Rev 5 13/13

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