ACS102-5TX

® ACS102-5Tx AC LINE SWITCH ASD™ AC Switch Family MAIN APPLICATIONS AC on-off static switching in appliance & industrial control systems Drive of low power high inductive or resistive loads like - relay, valve, solenoid, dispenser - pump, fan, micro-motor - low power lamp bulb, door lock s s OUT FEATURES s s G COM s s s s s Blocking voltage : VDRM / VRRM = 500V Clamping voltage : VCL = 600 V Nominal current : IT(RMS) = 0.2 A Gate triggering current : IGT < 5 mA Switch integrated driver Triggering current is sourced by the gate SO-8 package: - drive reference COM connected to 2 cooling pins - 3.5 mm creepage distance from pin OUT to other pins TO-92 ACS102-5TA NC COM COM G NC OUT NC NC BENEFITS Needs no external overvoltage protection Enables equipment to meet IEC61000-4-5 & IEC 335-1 Reduces component count by up to 80 % Interfaces directly with a microcontroller Eliminates any stressing gate kick back on microcontroller Allows straightforward connection of several ACS™ on same cooling pad. s s s s s s SO-8 ACS102-5T1 NC: Not Connected FUNCTIONAL DIAGRAM OUT DESCRIPTION The ACS102 belongs to the AC line switch family built around the ASD™ concept. This high performance device is able to control an up to 0.3 A load device. The ACS™ switch embeds a high voltage clamping 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. For further technical information, please refer to AN1172 application note. ASD and ACS are a trademarks of STMicroelectronics. ACS102 S ON D COM October 2001 - Ed: 7B G 1/8 ACS102-5Tx ABSOLUTE RATINGS (limiting values) Symbol VDRM / VRRM IT(RMS) ITSM dI/dt VPP Tstg Tj Tl Parameter Repetitive peak off-state voltage RMS on-state current full cycle sine wave 50 to 60 Hz Non repetitive surge peak on-state current Tj initial = 25°C, full cycle sine wave Critical rate of repetitive rise of on-state current IG = 10mA with tr = 100ns Non repetitive line peak pulse voltage Storage temperature range Operating junction temperature range Maximum lead temperature for soldering during 10s TO-92 SO-8 Tj = 125 °C Tamb = 100 °C Tamb = 100 °C F =50 Hz F =60 Hz F =120 Hz note 1 Value 500 0.2 0.2 7.3 8 20 2 - 40 to + 150 - 30 to + 125 260 Unit V A A A A A/µs kV °C °C °C Note 1: according to test described by IEC61000-4-5 standard & Figure 3. SWITCH GATE CHARACTERISTICS (maximum values) Symbol PG (AV) IGM VGM Peak gate current (tp = 20µs) Peak positive gate voltage (respect to the pin COM) Parameter Average gate power dissipation Value 0.1 1 5 Unit W A V THERMAL RESISTANCES Symbol Rth (j-a) Rth (j-l) Junction to ambient Junction to leads for full AC line cycle conduction Parameter TO-92 SO-8 * TO-92 * with 40mm2 copper (ex: 35µm) surface under “com” pins Value 150 150 60 Unit °C/W °C/W °C/W ELECTRICAL CHARACTERISTICS For either positive or negative polarity of pin OUT voltage respect to pin COM voltage excepted note 3*. Symbol IGT VGT VGD IH VOUT=12V VOUT=12V RL=140Ω RL=140Ω Test Conditions Tj=25°C Tj=25°C Tj=125°C Tj=25°C MAX MAX MIN TYP MAX IL IG= 20mA tp=380µs Tj=25°C TYP MAX VTM IDRM IRRM dV/dt (dI/dt)c *(Note 3) VCL IOUT = 0.3A VOUT = VDRM VOUT = VRRM VOUT=400V gate open (dV/dt)c = 5V/µs ICL = 1mA IOUT > 0 (dV/dt)c = 10V/µs IOUT < 0 tp=1ms Tj=25°C TYP Tj=25°C Tj=25°C Tj=125°C Tj=110°C Tj=110°C MAX MAX MAX MIN MIN Values 5 0.9 0.15 20 tbd 25 tbd 1.2 2 200 300 0.1 0.15 600 V V/µs A/ms V µA mA Unit mA V V mA VOUT=VDRM RL=3.3kΩ IOUT= 100mA gate open tbd = to be defined 2/8 ACS102-5Tx AC LINE SWITCH BASIC APPLICATION The ACS102 device is well adapted to washing machines, dish washers, tumble driers, refrigerators, water heaters, and cookware. It has been designed especially to switch on & off low power loads such as solenoids, valves, relays, dispensers, micro-motors, pumps, fans, door locks, and low power lamps bulbs. Pin COM : Common drive reference, to connect to the power line neutral Pin G : Switch Gate input to connect to the digital controller through a resistor Pin OUT : Switch Output, to connect to the load This ACS™ switch is triggered with a negative gate current flowing out of the gate pin G. It can be driven directly by the digital controller through a resistor as shown on the typical application diagram. No protection device are required between the gate and COM terminals. The SO-8 version allows to connect several ACS102 devices on the same cooling PCB pad which is the COM pin. In appliance systems, the ACS102 switch intends to drive low power loads in full cycle ON / OFF mode. The turn off commutation characteristics of these loads are described in Table 1. Thanks to its thermal and turn-off commutation characteristics, the ACS102 switch drives a load, such as door lock, lamp, relay, valve and micro motor, up to 0.2A without any turn-off aid circuit. Switching off the ACS within one full AC line cycle will extend its current up to 0.3 A. Table 1: Low power load turn off commutation requirement (230V AC applications). LOAD Door lock, lamp Relay Valve Dispenser Micro-motor Pump Fan Load IRMS current (A) < 0.2 < 0.2 1 > 0.7 (dI/dt)c POWER FACTOR (A/ms) < 0.1 < 0.1 (dV/dt)c (V/µs) < 0.15 0.2 < 0.15 < 10 < 20 TYPICAL APPLICATION DIAGRAM L LOAD AC MAINS N L R OUT S ON ACS102 D COM G ST 72 MCU - Vcc 3/8 ACS102-5Tx HIGH INDUCTIVE SWITCH-OFF OPERATION At the end of the last conduction half-cycle, the load current reaches the holding current level IH, and the ACS™ switch turns off. Because of the inductance L of the load, the current flows through the avalanche diode D 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 depends on the holding current IH and the inductance (up to 10 H); it can reach about 20 mJ and is dissipated in the clamping diode section. The ACS™ switch sustains the turn off energy, because its clamping section is designed for that purpose. Fig. 1: Turn-off operation of the ACS102 switch with an electro valve: waveform of the gate current IG, pin OUT current IOUT & voltage VOUT. IOUT (10 mA/div) Fig. 2: ACS102 switch static characteristic. IOUT VCL = 650V IH IH VOUT VOUT (200V/div) VCL Time (400µs/div) AC LINE TRANSIENT VOLTAGE RUGGEDNESS The ACS102 switch is able to withstand safely the AC line transient voltages either by clamping the low energy spikes or by breaking over under high energy shocks. The test circuit of the figure 3 is representative of the final ACS™ application and is also used to stress the ACS™ switch according to the IEC61000-4-5 standard conditions. Thanks to the load, the ACS™ switch withstands the voltage spikes up to 2 kV above the peak line voltage. It will break over safely even on resistive load where the turn on current rate of increase is high as shown on figure 4. Such non repetitive test can be done 10 times on each AC line voltage polarity. Fig. 3: Overvoltage ruggedness test circuit for resistive and inductive loads according to IEC61000-4-5 standard. R = 150Ω, L = 5µH, VPP = 2kV. Fig. 4: Current and Voltage of the ACS™ during IEC61000-4-5 standard test with R = 150Ω, L = 5µH & VPP = 2kV. R L Vout (200 V/div) OUT Iout (2.5 A/div) AC LINE & SURGE VOLTAGE GENERATOR S ACSxx ON VAC + V PP D COM G dI/dt = 70 A/µs RG= 220 Ω 4/8 ACS102-5Tx Fig. 5: Maximum power dissipation versus RMS on-state current. P(W) 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 IT(RMS)(A) 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 Fig. 6: RMS on-state current versus ambient temperature. IT(RMS)(A) 0.25 0.20 0.15 0.10 0.05 Tamb(°C) 0.00 0 20 40 60 80 100 120 140 Fig. 7-1: Relative variation of thermal impedance junction to ambient versus pulse duration (ACS102-5TA) (TO-92). Fig. 7-2: Relative variation of thermal impedance junction to ambient versus pulse duration (printed circuit board FR4, e(Cu) = 35µm, S(Cu) = 40mm2 under “com” pins) (ACS102-5T1) (SO-8). Zth(j-a) / Rth(j-a) 1.00 Zth(j-a) / Rth(j-a) 1.00 0.10 0.10 tp(s) 0.01 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2 tp(s) 0.01 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 5E+2 Fig. 8: Relative variation of gate trigger current versus junction temperature. IGT [Tj] / IGT [Tj=25°C] 3.0 2.5 2.0 1.5 1.0 0.5 Tj(°C) 0.0 -40 -20 0 20 40 60 80 100 120 140 Fig. 9: Relative variation of holding and latching current versus junction temperature. IH,IL [Tj] / IH,IL [Tj=25°C] 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -40 -20 0 20 Tj(°C) 40 60 80 100 120 140 5/8 ACS102-5Tx Fig. 10: Surge peak on-state current versus number of cycles. Fig. 11: Non-repetitive surge peak on-state current for a sinusoidal pulse with width tp