ACS108 STMICROELECTRONICS | Alldatasheet
Document overview
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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 VCL 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 –l a m p
Description
The ACS108 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. The ACS108 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. Figure 1. Functional diagram Table 1. Device summary OUT Output to connect to the load.
1 Characteristics
Table 2. Absolute maximum ratings (Tamb = 25 °C, unless otherwise specified)
0.8 ASOT-223
- According to test described by IEC 61000-4-5 standard and Figure 18
Table 3. Electrical characteristics (Tj = 25 °C, unless otherwise specified)
- Minimum I GT is guaranteed at 10% of IGT max
2 Alternating current mains switch - basic application
Figure 16. Typical application schematic
2.1 Protection against overvoltag e: the best choice is ACS
2.1.1 High inductive load switch-off: turn-off overvoltage clamping
With high inductive and low rms current loads the rate of decrease of the current is very low.
50 Hz)
Figure 17. Switching off of a high inductive load - typical clamping capability of
2.1.2 Alternating current main s transient voltage ruggedness
Such non-repetitive tests can be done 10 times on each AC mains voltage polarity. Figure 18. Overvoltage ruggedness test circuit for resistive and inductive loads, T
230 V rms
Figure 19. Typical current and voltage waveforms across the ACS108 (+2 kV surge,
3 Package information
specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 20. TO-92 dimension definitions Table 6. TO-92 dimension values
4 Ordering information
Figure 23. Ordering information scheme Table 8. Ordering information
5 Revision history
Table 9. Document revision history 21-Jun-2005 2 Marking information updated from ACSxxxx to ACS1xxx. 11-Jul-2012 3 Removed 500 V devices and added 600 V and 800 V devices. 27-Sep-2013 4 Corrected typographical error in Figure 4. 31-Oct-2013 5 Corrected character formatting issues in Section 2.1.1.