ACS102-6T1-TR ,Overvoltage protected AC switchElectrical characteristics (T = 25 °C, unless otherwise specified)jSymbol Test conditions Quadrant ..
ACS102-6TA , AC switch family Transient protected AC switch ACSTM
ACS102-6TA-TR ,Overvoltage protected AC switchAbsolute maximum ratings (T = 25 °C, unless otherwise specified)ambSymbol Parameter Value UnitTO-92 ..
ACS108 ,AC LINE SWITCHELECTRICAL CHARACTERISTICSFor either positive or negative polarity of pin OUT voltage respect to pi ..
ACS108 6S ,Overvoltage protected AC switchApplicationsFigure 1. Functional diagramOUT■ Alternating current on/off static switching in applian ..
ACS108-5SA ,AC LINE SWITCHAPPLICATIONSn AC on-off static switching in appliance &industrial control systemsn Drive of low pow ..
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ACS1026T-ACS102-6T1-TR-ACS102-6TA-TR
Overvoltage protected AC switch
ACS102-6T ransient protected AC switch (ACS™)
Features Needs no external protection snubber or
varistor Enables equipment to meet IEC 61000-4-5 Reduces component count by up to 80% Interfaces directly with the microcontroller Common package tab connection supports
connection of several alternating current
switches (ACS) on the same cooling pad Integrated structure based on ASD technology Overvoltage protection by crowbar technology High noise immunity - static dV/dt > 300 V/µs
Applications Alternating current on/off static switching in
appliances and industrial control systems Drive of low-power, high-inductive or resistive
loads like: relay, valve, solenoid dispenser, door lock micro-motor
DescriptionThe ACS102-6T belongs to the AC line switch
family. This high performance switch can control a
load of up to 0.2A.
The ACS102-6T switch includes an overvoltage
crowbar structure to absorb the overvoltage
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 TM: ACS is a trademark of STMicroelectronics
ASD: Application specific devices
Table 1. Device summary
Characteristics ACS102-6T
1 Characteristics
Table 2. Absolute maximum ratings (Tamb = 25 °C, unless otherwise specified) According to test described by IEC 61000-4-5 standard and Figure17
Table 3. Electrical characteristics (Tj = 25 °C, unless otherwise specified) Minimum IGT is guaranteed at 10% of IGT max For both polarities of OUT referenced to COM
ACS102-6T Characteristics
Table 4. Static electrical characteristics for both polarities of OUT referenced to COM
Table 5. Thermal resistance
Figure 2. Maximum power dissipation
versus on-state rms current
(full cycle)
Figure 3. On-state rms current versus
ambient temperature (full cycle)
Characteristics ACS102-6T
Figure 4. Relative variation of junction to
ambient thermal impedance versus
pulse duration and package
Figure 5. Relative variation of gate trigger,
holding and latching current versus
junction temperature
Figure 6. Non repetitive surge peak on-state
current versus number of cycles
Figure 7. Non repetitive surge peak on-state
current for a sinusoidal pulse, and
corresponding value of I²t
Figure 8. On-state characteristics
(maximal values)
Figure 9. SO-8 junction to ambient thermal
resistance versus copper surface
under tab
ACS102-6T Characteristics
Figure 10. Relative variation of critical rate
of decrease of main current (di/dt)c
versus junction temperature
Figure 11. Relative variation of critical rate of
decrease of main current (di/dt)c
versus (dV/dt)c
Figure 12. Relative variation of static dV/dt
versus junction temperature
Figure 13. Relative variation of the maximal
clamping voltage versus junction
temperature (min value)
Alternating current line switch - basic application ACS102-6T Alternating current line switch - basic applicationThe ACS102-6T switch is triggered by a negative gate current flowing from the gate pin G.
The switch can be driven directly by the digital controller through a resistor as shown in
Figure 14.
Thanks to its overvoltage protection and turn-off commutation performance, the ACS102-6T
switch can drive a small power, high-inductive load with neither varistor nor additional turn-
off snubber.
Figure 14. Typical application program
2.1 Protection against overvoltage: the best choice is ACSIn comparison with standard TRIACs, which are not robust against surge voltage, the
ACS102-6T is overvoltage self-protected, specified by the new parameter VCL . This feature
is useful in two operating conditions: in case of turn-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 clampingWith high inductive and low rms current loads the rate of decrease of the current is very low.
An overvoltage can occur when the gate current is removed and the OUT current is lower
than IH.
As shown in Figure 15 and Figure 16, at the end of the last conduction half cycle, the load
current decreases (1). The load current reaches the holding current level IH (2), and the
ACS turns off (3). The water valve, as an inductive load (up to 15 H), reacts as a current
generator and an overvoltage is created, which is clamped by the ACS (4). The current flows
through the ACS avalanche 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 is dissipated in the clamping section that is designed for this purpose. When the
energy has been dissipated, the ACS voltage falls back to the mains voltage value (5).
