ACS402-5SB4

® ACS402-5SB4 QUAD AC LINE SWITCH ARRAY ASD™ AC Switch Family MAIN APPLICATIONS n AC Line switch for appliance control systems n Drive of low power high inductive or resistive loads like: - solenoid, relay, valve, dispenser - micro-motor - door lock - low power lamp bulb - pump - fan FEATURES n 4 high voltage AC switch array n VDRM / VRRM = 500V n Avalanche controlled device IT(RMS) = 0.2 A per switch n IT(RMS) = 0.4 A for the total array n n Gate triggering current : IGT < 10 mA n Switch integrated driver DIL20 PIN OUT CONNECTION 1 OUT1 G1 OUT2 G2 Each ACS™ switch integrates a high voltage clamping structure to absorb the inductive turn off energy and a gate level shifter driver to separate the digital controller from each main switch. It is triggered with a negative gate current flowing out of the gate pin. Note: For further technical information, please refer to the Application note AN1172 FUNCTIONAL DIAGRAM OUT1 OUT2 OUT3 OUT4 BENEFITS n Miniaturizes 4 switches in 1 package. n Reduces the switch component count by up to 80%. n Needs no more external protection snubber & varistor. n Enables the equipment to meet IEC1000-4-5 standard. n Interfaces directly with the microcontroller. n Eliminates any stressing gate kick back on the microcontroller. DESCRIPTION The ACS402 belongs to the AC line switches array family built around the ASD™ concept. This high performance planar technology device includes 4 bi-directional a.c. switches able to control an 0.2 A resistive or inductive load. OUT3 G3 OUT4 G4 COM COM note : pins 1, 3, 5, 7, 9, 12, 14, 16, 18, 20 not connected. ACS402 S1 S2 S3 S4 ON ON ON ON D1 D2 D3 D4 Com G1 G2 G3 G4 November 1999 - Ed: 3B 1/6 ACS402-5SB4 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 rise of on-state current IG = 20mA with tr = 100ns Non repetitive line peak pulse voltage Storage temperature range Operating junction temperature range Maximum lead temperature for soldering during 10s per switch total array Tj = 25 °C Tamb = 90 °C Tamb = 75 °C F =50 Hz F =60 Hz Repetitive F =120 Hz note 1 Value 500 0.2 0.4 5 5.5 20 2 - 40 to + 150 0 to + 110 260 Unit V A A A A A/µs kV °C °C °C note 1 : according to test described by IEC 1000-4-5 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 RESISTANCE Symbol Rth (j-a) Junction to ambient Parameter Value 90 Unit °C/W ELECTRICAL CHARACTERISTICS PER SWITCH For either positive or negative polarity of pin OUT1, OUT2, OUT3, OUT4 voltage respect to pin COM voltage Symbol IGT VGT VGD IH VD = 12V VD = 12V Test conditions (DC) RL = 140Ω (DC) RL = 140Ω Tj=25°C Tj=25°C Tj=110°C Tj=25°C MAX MAX MIN TYP MAX IL IG = 20mA Tj=25°C TYP MAX VTM IDRM IRRM dV/dt (dI/dt)c VCL 2/6 IOUT = 0.3A VOUT = VDRM VOUT = VRRM VOUT = 400V gate open (dVOUT/dt)c = 10V/µs ICL = 1mA tp = 1ms tp = 380µs Tj=25°C Tj=25°C Tj=110°C Tj=110°C Tj=110°C Tj=25°C MAX MAX MAX MIN MIN TYP Values 10 1 0.2 25 60 30 65 1.1 2 50 500 0.1 600 Unit mA V V mA mA mA mA V µA µA V/µs A/ms V VOUT = VDRM RL = 3.3kΩ IOUT = 100mA gate open ACS402-5SB4 AC LINE SWITCH BASIC APPLICATION The ACS402 device is well adapted to washing machine, dishwasher, tumble drier, refrigerator, water heater and cookware. It has been designed especially to switch ON and OFF low power loads such as solenoid, valve, relay, micro-motor, pump, fan, door lock and low wattage lamp bulb. Pin COM: Common drive reference to connect to the power line neutral Pin G: Switch Gate input to connect to the digital controller Pin OUT: Switch Output to connect to the load Each 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. Note that no protection device (zener or capacitors) should be added between gates and common terminals. In appliances systems, this ACS™ switch intends to drive low power load in full cycle ON / OFF mode. The turn off commutation characteristics of these loads can be classified in 3 groups as shown in table 1. Thanks to its thermal and turn off commutation performances, each switch of the ACS402 is able to drive an inductive or resistive load up to 0.2 A with no additional turn off snubber. Table 1: Load grouping versus their turn off commutation requirement (230V AC applications). IRMS LOAD (A) Door lock Lamp Relay Valve Dispenser Micro-motor Pump Fan < 0.3 < 0.6 < 0.1 1 1 > 0.7 POWER FACTOR (A/ms) 0.15 0.4 < 0.05 (dI/dt)c (dV/dt)c (V/µs) 0.15 0.15 0.2 > 0.2 < 0.1 < 0.3 < 10 < 10 < 10 < 20 TYPICAL APPLICATION DIAGRAM VALVE / DISPENSER DOOR LOCK RELAY PUMP/FAN L MAINS M N OUT1 OUT2 OUT3 OUT4 S1 S2 S3 S4 ACS402 ON ON ON ON D1 D2 D3 D4 COM G1 G2 G3 G4 PA0 Vcc PA1 Vss PA2 PA3 ST72 MCU 3/6 ACS402-5SB4 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 section that is especially designed for that purpose. Fig 1: Turn-off operation of the ACS402 switch with an electro valve: waveform of the gate current IG, pin OUT current IOUT & voltage VOUT. Fig 2: ACS402 switch static characteristic. IOUT (10 mA/div) IOUT VCL = 650V IH IH VOUT VOUT (200V/div) VCL Time (400µs/div) AC LINE TRANSIENT VOLTAGE RUGGEDNESS Each ACS402 switch is able to sustain safely the AC line transient voltages either by clamping the low energy spikes or by breaking over under high energy shocks, even with high turn-on current rises. 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 IEC1000-4-5 standard conditions. Thanks to the load, the ACS™ switch sustains 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 rise 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 IEC 1000-4-5 standard. R = 150Ω, L = 5µH, VPP = 2kV. Fig 4: Current and voltage of the ACS™ during IEC 1000-4-5 standard test with a 220Ω - 10µH load & VPP = 2kV. Vout( 200 V/ v) di R L I out( A / v) 2 di OUT AC LINE & SURGE VOLTAGE GENERATOR S ACSxx ON VAC + V PP D dIdt= 100 A / / µs COM G RG= 220 Ω 4/6 ACS402-5SB4 Fig 5: Relative variation of gate trigger current versus junction temperature 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 0 25 50 Tj(°C) 75 100 125 IGT[Tj]/IGT[Tj=25°C] Fig 6: Relative variation of holding & latching currents versus junction temperature IH[Tj]/IH[Tj=25°C] & IL[Tj]/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 0 25 50 Tj(°C) 75 100 125 Fig 7: On state characteristics @Tj max VTO = 0.90 V & RT = 0.3 Ω (maximum values) Pon = V TO . 2. 2 . I T ( RMS ) Π + RT x I T ( RMS ) 2 Fig 8: Maximum total RMS current versus ambient temperature on an inductive load (PF>0.1) and a low repetitive rate (F