Datasheet - ACS108-8SA - 0.8 A - 800 V overvoltage protected AC switch (ACS™)

Document overview

  • Manufacturer or author: STMICROELECTRONICS
  • PDF pages: 13

Technical content

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 supports connection of several alternating current switches on the same cooling pad
  • V CL gives headroom before clamping then 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, air flow dumper – lamp

Description

The ACS108-8SA 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. This device 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. Note: ®: A.S.D. is a registered trademark of STMicroelectronics Note: TM: ACS is a trademark of STMicroelectronics Product status link ACS108-8SA Product summary IT(RMS) 0.8 A VDRM, VRRM 800 V IGT 10 mA

0.8 A - 800 V overvoltage protected AC switch (ACS™)

DS12901 - Rev 1 - February 2019 For further information contact your local STMicroelectronics sales office.

1 Characteristics

Table 1. Absolute maximum ratings (Tamb = 25 °C, unless otherwise specified)

  1. according to test described by standard IEC 61000-4-5, see Figure 15. Overvoltage ruggedness test circuit for resistive and

Table 2. Electrical characteristics (Tj = 25 °C, unless otherwise specified)

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

Table 3. Static electrical characteristics

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

Table 4. Thermal characteristics

1.1 Characteristics (curves)

Figure 1. Maximum power dissipation versus rms on-state Figure 2. On-state rms current versus ambient Figure 3. Relative variation of thermal impedance junction Figure 4. Relative variation of holding and latching

2 Alternating current mains switch - basic application

power high inductive load with neither varistor nor additional turn-off snubber. Figure 13. 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 parameter VCL. voltage that can occur on the electrical network.

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

occur when the gate current is removed and the OUT current is lower than IH.

Figure 14. Switching off of a high inductive load - typical clamping capability of ACS108 (Tamb = 25 °C)

2.1.2 Alternating current mains transient voltage ruggedness

or by breaking-over when subjected to high energy shocks, even with high turn-on current rises. Figure 16. Typical current and voltage waveforms across the ACS108 (+2 kV surge, IEC 61000-4-5 standard). Such non-repetitive tests can be done 10 times on each AC mains voltage polarity.

3 Package information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.

3.1 TO-92 package information

  • Epoxy meets UL94, V0
  • Lead free plating + halogen-free molding resin

Figure 17. TO-92 package outline Table 5. TO-92 package mechanical data

  1. Inches dimensions given for information

Package information

DS12901 - Rev 1 page 10/13

4 Ordering information

Figure 18. Ordering information scheme Table 6. Ordering information

2500 Bulk

  1. First row = ACS108, second row = 8SA

Ordering information

DS12901 - Rev 1 page 11/13

Revision history

Table 7. Document revision history 25-Feb-2019 1 Initial release.