ST ACS120-7SB, ACS120-7SFP, ACS120-7ST User Manual

®

ASD™

AC Switch Family

MAIN APPLICATIONS

AC static switching in appliance control systems

■

Drive of low power high inductive or resistive

■

loads like

- relay, valve, solenoid, dispenser

- pump, fan, micro-motor

- defrost heater

FEATURES

Blocking voltage : V

■

Avalanche controlled : VCLtyp = 1100 V

■

Nominal conducting current : I

■

Gate triggering current : IGT<10mA

■

■ Switch integrated driver

■ High noise immunity : static dV/dt >500V/µs

DRM/VRRM

= +/-700V

T(RMS)

=2A

ACS120-7SB/SFP/ST

AC LINE SWITCH

COM

G

OUT

DPAK

ACS120-7SB

G

COM

OUT

TO-220FPAB

ACS120-7SFP

BENEFITS

■ Needs no more external protection snubber or

varistor

■

Enables equipment to meet IEC 61000-4-5

■

Reduces component count up to 80 %

■

Interfaces directly with the microcontroller

■

Eliminates any gate kick back on the
microcontroller

■

Allows straightforward connection of several
ACS™ on same cooling pad.

DESCRIPTION

The ACS120 belongs to the AC line switch family
built around the ASD™ concept. This high perfor­manceswitchcircuitisableto control a loadup to 2
A.

The ACS™ switch embeds a high voltage clamp­ingstructure to absorb the inductiveturnoff energy
anda gate level shifterdriver to separate thedigital
controller from the main switch. It is triggered with
a negative gate current flowing out of the gate pin.

G

COM

OUT

TO-220AB

ACS120-7ST

FUNCTIONAL DIAGRAM

OUT

S

ON

D

April 2003 - Ed: 2A

COM

G

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ACS120-7SB/SFP/ST

ABSOLUTE RATINGS (limiting values)

For either positive or negative polarity of pin OUT voltage in respect to pin COM voltage

Symbol Parameter Value Unit

V

DRM/VRRM

I

T(RMS)

I

TSM

2

I

t Fusing capability tp = 10ms 2.2 A²s

dI/dt Repetitiveon-state current critical rate

V

PP

Tstg Storagetemperature range - 40 to + 150 °C

Tj Operating junction temperature range - 30 to + 125 °C
Tl Maximum lead soldering temperature during 10s 260 °C

Note 1: according to test described by IEC61000-4-5 standard & Figure 3.

GATE CHARACTERISTICS (maximum values)

Symbol Parameter Value Unit

P

G (AV)

I

GM

V

GM

Repetitive peak off-state voltage Tj = -10 °C 700 V
RMS on-state current full cycle sine

wave 50 to 60 Hz

DPAK Tc = 115 °C 2 A

TO-220FPAB Tc = °C

TO-220AB Tc = 115 °C

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

of rise I

= 10mA (tr < 100ns)

G

Non repetitive line peak pulse voltage

Tj = 125°C

F =50 Hz 20 A
F =60 Hz 11 A

F = 120 Hz 50 A/µs

note 1

2kV

Average gate power dissipation 0.1 W
Peak gate current (tp = 20µs) 1 A
Peak positive gate voltage (in respect to pin COM) 5 V

THERMAL RESISTANCES

Symbol Parameter Value Unit

Rth (j-a) Junctionto ambient S = 0.5cm² DPAK 70 °C/W

TO-220FPAB 60 °C/W

TO-220AB 60 °C/W

Rth (j-l) Junction to tab/lead for full cycle sine wave

conduction

S = Copper surface under Tab

DPAK 2.6 °C/W

TO-220FPAB 3.5 °C/W

TO-220AB 2.6 °C/W

2/11

PARAMETER DESCRIPTION

Parameter Symbol Parameter description

ACS120-7SB/SFP/ST

I

GT

V

GT

V

GD

I

H

I

L

V

TM

V

TO

Triggering gate current
Triggering gate voltage
Non-triggering gate voltage
Holding current
Latching current
Peak on-state voltage drop

On state threshold voltage
Rd On state dynamic resistance
I

DRM/IRRM

Maximum forward or reverse leakage current
dV/dt Critical rate of rise of off-state voltage
(dV/dt)c Critical rate of rise of commutating off-state voltage
(dI/dt)c Critical rate of decrease of commutating on-state current
V

CL

I

CL

Clamping voltage

Clamping current

ELECTRICAL CHARACTERISTICS

For either positive or negative polarity of pin OUT voltage in respect to pin COM voltage.

Symbol Test Conditions Values Unit

I

GT

V

GT

V

GD

I

H

I

L

V

TM

V

TO

Rd Tj=125°C MAX 200 mΩ

I

DRM

I

RRM

dV/dt V

(dI/dt)c (dV/dt)c = 20V/µs Tj=125°C MIN 1 A/ms

V

CL

V

=12V (DC) RL=140Ω QII - QIII Tj=25°C MAX 10 mA

OUT

V

=12V (DC) RL=140Ω QII - QIII Tj=25°C MAX 1 V

OUT

V

OUT=VDRMRL

I

= 100mA gate open Tj=25°C MAX 45 mA

OUT

=3.3kΩ Tj=125°C MIN 0.15 V

IG= 20mA Tj=25°C MAX 65 mA
I

= 2.8A tp=380µs Tj=25°C MAX 1.3 V

OUT

Tj=125°C MAX 0.85 V

/

V

= 700V Tj=25°C MAX 2 µA

OUT

Tj=125°C MAX 200

=460V gate open Tj=110°C MIN 500 V/µs

OUT

ICL= 1mA tp=1ms Tj=25°C TYP 1100 V

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ACS120-7SB/SFP/ST

AC LINE SWITCH BASIC APPLICATION

The ACS120 device is well adapted to Washing machine, dishwasher, tumble drier, refrigerator,
air-conditioningsystems, and cookware.Ithas been designedespecially to switchon & off lowpower loads
such as solenoid, valve, relay, dispenser, micro-motor, pump, fan and defrost heaters.

Pin COM: Common drive reference to connect to the power line neutral
Pin G: Switch Gate input to connect to the digital controller
Pin OUT: Switch Output to connect to the load

ThisACS™switch is triggered with anegative gate current flowing outofthe gate pin G. Itcan be driven di­rectly by the digital controller through a resistor as shown on the typical application diagram.

Thanks to its thermal and turn off commutation performances, the ACS120 switch is able to drive with no
turn off additional snubber an inductive load up to 2 A.

TYPICAL APPLICATION DIAGRAM

L

AC

MAINS

N

-Vcc

D

COM

LOAD

L

M

R

OUT

ACS120

S

ON

G

ST72 MCU

HIGH INDUCTIVE SWITCH-OFF OPERATION

At the end of the last conduction half-cycle, the load current reaches the holding current level I

, and the

H

ACS™ switch turns off. Because of the inductance L of the load, the current flows then through the ava­lanche diode D and decreases linearly to zero. During this time, the voltage across the switch is limited to
the clamping voltage V

The energy stored in the inductance of the load depends on the holding current I

CL

.

and the inductance (up

H

to10 H); it canreach about 10 mJandis dissipated intheclamping diode section.TheACS switch sustains
the turn off energy because its clamping section is designed for that purpose.

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