ACST2 STMICROELECTRONICS | Alldatasheet

Document overview

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Technical content

Alternating current switch Main features ■ Overvoltage crowbar technology ■ High noise immunity: static dV/dt > 500 V/µs The ACST2-8SFP in the TO-220FPAB package provides insulation voltage rated at 1500VRMS Main application ■ AC ON/OFF static switching in appliances & industrial control systems ■ Drive of low power highly resistive or inductive loads like: – solenoid, – pump, fan, micro-motor

Description

The ACST2 series belongs to the AC power switch family built around the ASD technology. This high performance device is adapted to home appliances or industrial systems and drives loads up to 2 A. This ACST2 switch embeds a Triac structure with a high voltage clamping device to absorb the inductive turn-off energy and withstand line transients such as those described in the IEC 61000-4-5 standards. The component needs a low gate current to be activated (I GT < 10 mA) and in the mean time provides a high electrical noise immunity such as those described in the IEC 61000-4-4 standards. Benefits ■ Enables equipment to meet IEC 61000-4-5 ■ High off-state reliability with planar technology ■ Needs no external overvoltage protection ■ Reduces component count ■ Interfaces directly with the micro-controller ■ High immunity against fast transients described in IEC 61000-4-4 standards Order code Functional diagram Symbol Value Unit IT(RMS) 2A VDRM/VRRM 800 V IGT 10 mA Part number Marking ACST2-8SFP ACST28S ACST2-8SB ACST28S COM COM OUT OUT G G TO-220FPAB ACST2-8SFP DPAK ACST2-8SB OUT G COM OUT G COM

1 Characteristics

Table 1. Absolute maximum ratings (limiting values)

  1. according to test describ ed by IEC 61000-4-5 standard and Figure 16

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

  1. minimum I GT is guaranteed at 5% of IGT max
  2. for both polarity of OUT pin referenced to COM pin

2 AC line switch basic application

the ACST2 switch can drive, without any additional snubber, an inductive load up to 2 A. Figure 15. Typical application diagram

2.1 Protection against overvoltage: the best choice is ACST

above the peak line voltage. The protection is based on an overvoltage crowbar technology. can be done 10 times on each AC line voltage polarity.

2.2 Electrical noise immunity

intrinsic immunity of the ACST2 is shown by the specified dV/dt equal to 500 V/µs @ 125° C.

3 Ordering information scheme

Figure 16. Overvoltage ruggedness test circuit Figure 17. Typical current and voltage

4 Package information

  • Epoxy meets UL94, V0

Table 5. TO-220FPAB dimensions

Figure 18. Footprint (dimensions in mm) conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Table 6. DPAK dimensions

5 Ordering information

6 Revision history

Part number Marking Package Weight Base Qty Packing mode ACST2-8SFP ACST28S TO-220FPAB 2.4g 50 Tube ACST2-8SB ACST28S DPAK 0.3g 50 Tube ACST2-8SB-TR ACST28S DPAK 0.3g 2500 Tape and Reel Date Revision Changes 01-Mar-2007 1 Initial release.