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

®	ACS120-7SB/SFP/ST
ASD™	AC LINE SWITCH
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 : VDRM / VRRM = +/-700V

■Avalanche controlled : VCL typ = 1100 V

■Nominal conducting current : IT(RMS) = 2A

■Gate triggering current : IGT < 10 mA

■Switch integrated driver

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

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 performance switch circuit is able to control a load up to 2 A.

The ACS™ switch embeds a high voltage clamping 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.

April 2003 - Ed: 2A

COM

G

OUT

DPAK

ACS120-7SB

G

COM

OUT

TO-220FPAB

ACS120-7SFP

G

COM

OUT

TO-220AB

ACS120-7ST

FUNCTIONAL DIAGRAM

	OUT
	S
	ON
D
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
VDRM / VRRM	Repetitive peak off-state voltage		Tj = -10 °C	700	V
IT(RMS)	RMS on-state current full cycle sine	DPAK	Tc = 115 °C	2	A
	wave 50 to 60 Hz	TO-220FPAB	Tc = °C
		TO-220AB	Tc = 115 °C
ITSM	Non repetitive surge peak on-state current		F =50 Hz	20	A
	Tj initial = 25°C, full cycle sine wave		F =60 Hz	11	A
I2t	Fusing capability		tp = 10ms	2.2	A²s
dI/dt	Repetitive on-state current critical rate	Tj = 125°C	F = 120 Hz	50	A/μs
	of rise IG = 10mA (tr < 100ns)
VPP	Non repetitive line peak pulse voltage		note 1	2	kV
Tstg	Storage temperature 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
PG (AV)	Average gate power dissipation				0.1		W
IGM	Peak gate current (tp = 20µs)				1		A
VGM	Peak positive gate voltage (in respect to pin COM)				5		V
THERMAL RESISTANCES
Symbol	Parameter					Value	Unit
Rth (j-a)	Junction to 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	DPAK				2.6	°C/W
	conduction	TO-220FPAB				3.5	°C/W
		TO-220AB				2.6	°C/W

S = Copper surface under Tab

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	ACS120-7SB/SFP/ST
PARAMETER DESCRIPTION
Parameter Symbol	Parameter description
IGT	Triggering gate current
VGT	Triggering gate voltage
VGD	Non-triggering gate voltage
IH	Holding current
IL	Latching current
VTM	Peak on-state voltage drop
VTO	On state threshold voltage
Rd	On state dynamic resistance
IDRM / 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
VCL	Clamping voltage
ICL	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
IGT	VOUT=12V (DC)		RL=140Ω	QII - QIII	Tj=25°C	MAX	10	mA
VGT	VOUT=12V (DC)		RL=140Ω	QII - QIII	Tj=25°C	MAX	1	V
VGD	VOUT=VDRM RL=3.3kΩ				Tj=125°C	MIN	0.15	V
IH	IOUT= 100mA gate open				Tj=25°C	MAX	45	mA
IL	IG= 20mA				Tj=25°C	MAX	65	mA
VTM	IOUT = 2.8A	tp=380μs			Tj=25°C	MAX	1.3	V
VTO					Tj=125°C	MAX	0.85	V
Rd					Tj=125°C	MAX	200	m Ω
IDRM /	VOUT = 700V				Tj=25°C	MAX	2	μA
IRRM
					Tj=125°C	MAX	200
dV/dt	VOUT=460V gate open				Tj=110°C	MIN	500	V/ μs
(dI/dt)c	(dV/dt)c = 20V/μs				Tj=125°C	MIN	1	A/ms
VCL	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-conditioning systems, and cookware. It has been designed especially to switch on & off low power 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

This ACS™ switch is triggered with a negative gate current flowing out of the gate pin G. It can 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	LOAD
		L
	AC	M
	MAINS
		R
	N
		OUT
		ACS120
		S
		ON
	D
	COM	G

ST72 MCU

- Vcc

HIGH INDUCTIVE SWITCH-OFF OPERATION

At the end of the last conduction half-cycle, the load current reaches the holding current level IH , and the 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 VCL.

The energy stored in the inductance of the load depends on the holding current IH and the inductance (up to 10 H); it can reach about 10 mJ and is dissipated in the clamping diode section. The ACS switch sustains the turn off energy because its clamping section is designed for that purpose.

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