PDF ACST8 Data sheet ( Hoja de datos )

Número de pieza	ACST8
Descripción	OVER VOLTAGE PROTECTED AC POWER SWITCH
Fabricantes	STMicroelectronics
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No Preview Available ! ® ASD™ (AC Switch Family) ACST8 OVER VOLTAGE PROTECTED AC POWER SWITCH MAIN APPLICATIONS ■ AC static switching in appliance & industrial control systems ■ Washing machine with bi-rotational induction motor drive ■ Induction motor drive for: - refrigerator / freezer compressor - air conditioning compressor FEATURES ■ VDRM /VRRM = +/- 800V ■ Avalanche controlled device ■ IT(RMS) = 8A with TCASE = 90 °C ■ High noise immunity: static dV/dt > 750 V/µs ■ Gate triggering current : IGT < 30 mA ■ Snubberless turn off commutation: (dI/dt)c > 4.5A/ms BENEFITS ■ Enables equipment to meet EN61000-4-5 standard ■ High off-state reliability with planar technology ■ Need no external overvoltage protection ■ Reduces the power component count DESCRIPTION The ACST8-8C belongs to the AC power switch family built around the ASDTM technology. This high performance device is adapted to home appli- ances or industrial systems and drives an induc- tion motor up to 8A. This ACST switch embeds a triac structure with a high voltage clamping device to absorb the induc- tive turn off energy and withstand line transients such as those described in the IEC61000-4-5 standards. OUT G OUT COM TO-220FPAB ACST8-8CFP OUT G OUT COM TO-220AB ACST8-8CT G COM D2PAK ACST8-8CG Table 1: Order Codes Part Number ACST8-8CFP ACST8-8CT ACST8-8CG Marking ACST88C Figure 1: Functional Diagram OUT G COM TM: ASD is a trademark of STMicroelectronics. November 2004 REV. 6 1/10 1 page ACST8 3. AC LINE TRANSIENT VOLTAGE RUGGEDNESS The ACST8-8C switch is able to safely withstand the AC line transient voltages either by clamping the low energy spikes or by breaking over under high energy shocks. The test circuit in figure 3 is representative of the ACST application and is used to test the ACST switch according to the IEC61000-4-5 standard conditions. Thanks to the load impedance, the ACST switch with- stands voltage spikes up to 2 kV above the peak line voltage by breaking over safely. Such non repetitive testing can be done 10 times on each AC line voltage polarity. Figure 3: Overvoltage ruggedness test circuit for resistive and inductive loads according to IEC61000-4-5 standard R = 47Ω, L = 10µH & VPP = 2kV RL SURGE VOLTAGE AC LINE & GENERATOR VAC + VPP OUT COM G Figure 4: Maximum power dissipation versus RMS on-state current P(W) 11 10 α=180° 9 8 7 6 5 4 3 180° 2α α 1 IT(RMS)(A) 0 012345678 Figure 6: RMS on-state current versus ambient temperature IT(RMS)(A) 3.0 2.5 D2PAK 2.0 1.5 TO-220FPAB/TO-220AB 1.0 0.5 0.0 0 25 Tamb(°C) 50 75 α=180° Printed circuit board FR4 Natural convection 100 125 Figure 5: RMS on-state current versus case temperature IT(RMS)(A) 9 8 7 6 5 4 3 2 1 α=180° 0 0 25 TO-220FPAB TO-220AB/D2PAK TC(°C) 50 75 100 125 Figure 7: Relative variation of thermal impedance versus pulse duration (TO-220FPAB) K=[Zth/Rth] 1.E+00 Zth(j-c) 1.E-01 Zth(j-a) 1.E-02 1.E-03 1.E-03 1.E-02 tp(°C) TO-220FPAB 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 5/10 5 Page

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PDF Descargar	[ Datasheet ACST8.PDF ]

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