ACPL-W345-500E

Data Sheet ACPL-P345 and ACPL-W345 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Rail-toRail Output Voltage in Stretched SO6 Description Features The Broadcom® ACPL-P345/W345 contains an AlGaAs LED, which is optically coupled to an integrated circuit with a power output stage. This optocoupler is ideally suited for driving power, GaN(Gallium Nitride), and SiC(Silicon Carbide) MOSFETs used in inverter or AC-DC/DC-DC converter applications. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices. The voltage and high peak output current supplied by this optocoupler make it ideally suited for direct driving MOSFETs at high frequency for high efficiency conversion. The ACPL-P345 and ACPL-W345 have the highest insulation voltage of VIORM = 891 Vpeak and VIORM = 1140 Vpeak respectively in the IEC/EN/DIN EN 60747-5-5.             1.0A maximum peak output current 0.8A minimum peak output current Rail-to-rail output voltage 120 ns maximum propagation delay 50 ns maximum propagation delay difference LED current input with hysteresis 100 kV/µs minimum Common Mode Rejection (CMR) at VCM = 1500V ICC = 4.0 mA maximum supply current Under Voltage Lock-Out protection (UVLO) with hysteresis Wide operating VCC range: 10V to 20V Industrial temperature range: –40°C to +105°C Safety approval: – UL Recognized 3750/5000 VRMS for 1 min. – CSA – IEC/EN/DIN EN 60747-5-5 VIORM = 891/1140 VPEAK Applications    Power, GaN, and SiC MOSFET gate drive AC and Brushless DC motor drives Switching power supplies CAUTION! It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. The components featured in this datasheet are not to be used in military or aerospace applications or environments. Broadcom AV02-4079EN August 15, 2018 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Functional Diagram Truth Table ANODE 1 6 V CC NC 2 5 V OUT CATHODE 3 4 V EE NOTE: LED VCC – VEE Positive Going (Turn-On) VCC to VEE Negative Going (Turn-Off VO OFF 0V to 20V 0V to 20V LOW ON 0V to 8.1V 0V to 7.1V LOW ON 8.1V to 9.1V 7.1V to 8.1V TRANSITION ON 9.1V to 20V 8.1V to 20V HIGH A 1-µF bypass capacitor must be connected between pins VCC and VEE. Ordering Information ACPL-P345 is UL Recognized with 3750VRMS for 1 minute per UL1577. ACPL-W345 is UL Recognized with 5000 VRMS for 1 minute per UL1577. Option Part Number RoHS Compliant Package Surface Mount ACPL-P345 ACPL-W345 -000E Stretched SO-6 X -500E X -060E X -560E X Tape and Reel IEC/EN/DIN EN 60747-5-5 Quantity 100 per tube X X 1000 per reel X 100 per tube X 1000 per reel To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. Example 1: ACPL-P345-560E to order product of Stretched SO-6 Surface Mount package in Tape and Reel packaging with IEC/EN/ DIN EN 60747-5-5 Safety Approval in RoHS compliant. Example 2: ACPL-W345-000E to order product of Stretched SO-6 Surface Mount package in Tube packaging and RoHS compliant. Option data sheets are available. Contact your Broadcom sales representative or authorized distributor for information. Broadcom AV02-4079EN 2 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Package Outline Drawings ACPL-P345 Stretched SO-6 Package (7-mm Clearance) 1.27 (0.050) BSG 0.381 ±0.127 (0.015 ±0.005) + 0.254 *4.580 – 0 + 0.010 ( 0.180 – 0.000) Land Pattern Recommendation 0.76 (0.03) 1.27 (0.05) 10.7 (0.421) 2.16 (0.085) 7.62 (0.300) 1.590 ±0.127 6.81 (0.268) (0.063 ±0.005) 0.45 (0.018) 45° 3.180 ±0.127 (0.125 ±0.005) 7° 7° 7° 0.20 ±0.10 7° (0.008 ±0.004) 1 ±0.250 (0.040 ±0.010) 5° NOM. 9.7 ±0.250 (0.382 ±0.010) 0.254 ±0.050 (0.010 ±0.002) Floating Lead Protusions max. 0.25 (0.01) Dimensions in Millimeters (Inches) Lead Coplanarity = 0.1 mm (0.004 Inches) *Total package length (inclusive of mold flash) 4.834 mm ±0.254 mm (0.190” ±0.010”) Broadcom AV02-4079EN 3 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet ACPL-W345 Stretched SO-6 Package (8-mm Clearance) + 0.254 *4.580 – 0 + 0.010 ( 0.180 – 0.000) 1.27 (0.050) BSG 0.381 ±0.127 Land Pattern Recommendation 0.76 (0.03) (0.015 ±0.005) 1 6 2 5 3 4 1.27 (0.05) 7.62 (0.300) + 0.127 6.807 – 0 + 0.005 ( 0.268 – 0.000) 1.590 ±0.127 (0.063 ±0.005) 7° 45° 0.45 (0.018) 1.905 (0.075) 12.65 (0.5) 3.180 ±0.127 (0.125 ±0.005) 7° 0.20 ±0.10 (0.008 ±0.004) 0.254 ±0.050 7° 7° (0.010 ±0.002) 0.750 ±0.250 (0.0295 ±0.010) 35° NOM. 11.500 ±0.25 (0.453 ±0.010) Floating Lead Protusions max. 0.25 (0.01) Dimensions in Millimeters (Inches) Lead Coplanarity = 0.1 mm (0.004 Inches) *Total package length (inclusive of mold flash) 4.834 mm ±0.254 mm (0.190” ±0.010”) Recommended Pb-Free IR Profile Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision). Non- Halide Flux should be used. Regulatory Information The ACPL-P345/W345 is approved by the following organizations. UL Recognized under UL 1577, component recognition program up to VISO = 3750 VRMS (ACPL-P345) and VISO = 5000 VRMS (ACPL-W345). CSA CSA Component Acceptance Notice #5, File CA 88324 IEC/EN/DIN EN 60747-5-5 (Option 060 Only) Maximum Working Insulation Voltage VIORM = 891 Vpeak (ACPL-P345) and VIORM = 1140 Vpeak (ACPL-W345) Broadcom AV02-4079EN 4 ACPL-P345 and ACPL-W345 Data Sheet 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 IEC/EN/DIN EN 60747-5-5 Insulation Characteristics (Option 060) Description Symbol Installation classification per DIN VDE 0110/39, Table 1 for rated mains voltage ≤ 150 VRMS for rated mains voltage ≤ 300 VRMS for rated mains voltage ≤ 450 VRMS for rated mains voltage ≤ 600 VRMS ACPL-P345 Option 060 ACPL-W345 Option 060 I – IV I – IV I – III I – III I – IV I – IV I – IV I – IV I – III 40/105/21 40/105/21 for rated mains voltage ≤ 1000 VRMS Climatic Classification Pollution Degree (DIN VDE 0110/39) Unit 2 2 VIORM 891 1140 VPEAK Input to Output Test Voltage, Method ba VIORM × 1.875 = VPR, 100% Production Test with tm = 1 second, Partial discharge < 5 pC VPR 1671 2137 VPEAK Input to Output Test Voltage, Method aa VIORM × 1.6 = VPR, Type and Sample Test, tm = 10 seconds, Partial discharge < 5 pC VPR 1426 1824 VPEAK VIOTM 6000 8000 VPEAK TS 175 230 600 175 230 600 °C mA mW >109 >109  Maximum Working Insulation Voltage Highest Allowable Overvoltagea (Transient Overvoltage tini = 60 seconds) Safety-limiting values – maximum values allowed in the event of a failure Case Temperature Input Current Output Power Insulation Resistance at TS, VIO = 500 V IS,INPUT PS, OUTPUT RS a. Refer to IEC/EN/DIN EN 60747-5-5 Optoisolator Safety Standard section of the Broadcom Regulatory Guide to Isolation Circuits, AV02-2041EN, for a detailed description of Method a and Method b partial discharge test profiles. NOTE: Broadcom These optocouplers are suitable for “safe electrical isolation” only within the safety limit data. Maintenance of the safety data shall be ensured by means of protective circuits. Surface mount classification is Class A in accordance with CECC 00802. AV02-4079EN 5 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Insulation and Safety-Related Specifications Parameter Symbol ACPL-P345 ACPL-W345 Units Conditions Minimum External Air Gap (Clearance)a L(101) 7.0 8.0 mm Measured from input terminals to output terminals, shortest distance through air. Minimum External Tracking (Creepage)a L(102) 8.0 8.0 mm Measured from input terminals to output terminals, shortest distance path along body. 0.08 0.08 mm Through insulation distance conductor to conductor, usually the straight line distance thickness between the emitter and detector. > 175 > 175 V IIIa IIIa Minimum Internal Plastic Gap (Internal Clearance)a Tracking Resistance (Comparative Tracking Index) CTI Isolation Group DIN EN 60112 (2010-05) Material Group (DIN VDE 0110, 1/89, Table 1) a. All Broadcom data sheets report the creepage and clearance inherent to the optocoupler component itself. These dimensions are needed as a starting point for the equipment designer when determining the circuit insulation requirements. However, once mounted on a printed circuit board, minimum creepage and clearance requirements must be met as specified for individual equipment standards. For creepage, the shortest distance path along the surface of a printed circuit board between the solder fillets of the input and output leads must be considered (the recommended Land Pattern does not necessarily meet the minimum creepage of the device). There are recommended techniques such as grooves and ribs which may be used on a printed circuit board to achieve desired creepage and clearances. Creepage and clearance distances will also change depending on factors such as pollution degree and insulation level. Absolute Maximum Ratings Parameter Symbol Min. Max. Unit Storage Temperature TS –55 125 °C Operating Temperature TA –40 105 °C Output IC Junction Temperature TJ — 125 °C Average Input Current IF(AVG) — 25 mA Peak Transient Input Current ( 5 V 12, 13 Threshold Input Voltage High to Low VFHL 0.8 — — V VF 1.2 1.55 1.95 V IF = 9 mA 13 VF/TA — –1.7 — mV/°C Input Reverse Breakdown Voltage BVR 5 — — V IR = 100 µA Input Capacitance CIN — 70 — pF f = 1 MHz, VF = 0V UVLO Threshold VUVLO+ 8.1 8.6 9.1 V VO > 5 V, IF = 9 mA VUVLO- 7.1 7.6 8.1 UVLO Hysteresis UVLOHYS 0.5 1.0 — Input Forward Voltage Temperature Coefficient of Input Forward Voltage VCC – 0.3 VCC – 0.2 Test Conditions Figure 2, 4 Note b, c 10, 11 V a. Maximum pulse width = 10 µs. b. In this test, VOH is measured with a DC load current. When driving capacitive loads, VOH will approach VCC as IOH approaches zero amps. c. Maximum pulse width = 1 ms. Broadcom AV02-4079EN 7 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Switching Specifications (AC) All typical values are at TA = 25°C, VCC – VEE = 10V, VEE = Ground. All minimum and maximum specifications are at recommended operating conditions (TA = –40°C to 105°C, IF(ON) = 7 mA to 11 mA, VF(OFF) = –3.6V to 0.8V, VEE = Ground), unless otherwise noted. Parameter Symbol Min. Typ. Max. Unit Propagation Delay Time to High Output Level tPLH 30 55 120 ns Propagation Delay Time to Low Output Level tPHL 30 55 120 ns Pulse Width Distortion PWD — 0 50 ns –50 — +50 ns tPSK — — 40 ns Rise Time tR — 8 30 ns Fall Time tF — 8 30 ns Output High Level Common Mode Transient Immunity |CMH| 100 — — kV/µs TA = 25°C, IF = 9 mA, VCC = 20V, VCM = 1500V with split resistors Output Low Level Common Mode Transient Immunity |CML| 100 — — kV/µs TA = 25°C, VF = 0V, VCC = 20V, VCM = 1500V with split resistors Propagation Delay Difference Between PDD Any Two Parts (tPHL – tPLH) Propagation Delay Skew Test Conditions Rg = 10, Cg = 10 nF, f = 200 kHz , Duty Cycle = 50%, VCC = 10V Figure Note 8, 9, 10, 11 a 18, 19 b c Cg = 1 nF, f = 200 kHz, Duty Cycle = 50%, VCC = 10V 12, 14 15 d, e f a. The difference between tPHL and tPLH between any two ACPL-P345 parts under the same test condition. b. Propagation Delay Difference (PDD) is the difference between tPHL and tPLH between any two units under the same test condition. c. tPSK is equal to the worst case difference in tPHL and/or tPLH that will be seen between units at any given temperature and specified test conditions. d. Pin 2 needs to be connected to LED common. Split resistor network in the ratio 1.5:1 with 232 at the anode and 154 at the cathode. e. Common mode transient immunity in the high state is the maximum tolerable dVCM/dt of the common mode pulse, VCM, to assure that the output will remain in the high state (that is, VO > 10.0V). f. Common mode transient immunity in a low state is the maximum tolerable dVCM/dt of the common mode pulse, VCM, to assure that the output will remain in a low state (meaning VO < 1.0V). Broadcom AV02-4079EN 8 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Package Characteristics All typical values are at TA = 25°C. All minimum/maximum specifications are at recommended operating conditions, unless otherwise noted. Parameter Input-Output Momentary Withstand Voltagea Symbol Device Min. Typ. Max. Unit Test Conditions VISO ACPL-P345 3750 — — VRMS RH < 50%, t = 1 min., TA = 25°C b, c ACPL-W345 5000 — — VRMS RH < 50%, t = 1 min., TA = 25°C c, d Input-Output Resistance RI-O — >5012 —  VI-O = 500 VDC Input-Output Capacitance CI-O — 0.6 — pF f =1 MHz LED-to-Ambient Thermal Resistance R11 — 135 — °C/W LED-to-Detector Thermal Resistance R12 — 27 — Detector-to-LED Thermal Resistance R21 — 39 — Detector-to-Ambient Thermal Resistance R22 — 47 — Figure Note c e a. The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating. For the continuous voltage rating, refer to your equipment level safety specification or Broadcom Application Note 1074, Optocoupler Input-Output Endurance Voltage. b. In accordance with UL1577, each optocoupler is proof tested by applying an insulation test voltage ≥ 4500VRMS for 1 second (leakage detection current limit, II-O ≤ 5 µA). c. Device considered a two-terminal device: pins 1, 2, and 3 shorted together and pins 4, 5, and 6 shorted together. d. In accordance with UL1577, each optocoupler is proof tested by applying an insulation test voltage ≥ 6000VRMS for 1 second (leakage detection current limit II-O ≤ 5 µA). e. The device was mounted on a high conductivity test board as per JEDEC 51-7. Broadcom AV02-4079EN 9 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Typical Performance Plots Figure 1: High Output Rail Voltage vs. Temperature Figure 2: VOH vs. Temperature (VOH - VCC) - HIGH OUTPUT VOLTAGE DROP - V VOH - HIGH OUTPUT RAIL VOLTAGE - V 10.005 IF = 9 mA IOUT = 0 mA V CC = 10V V EE = 0V 10 9.995 9.99 9.985 9.98 -40 -20 0 20 40 60 TA - TEMPERATURE - °C 80 100 Figure 3: VOL vs. Temperature IF = 9 mA V OUT = VCC – 10V V CC = 10V V EE = 0V -0.150 -0.200 -0.250 -0.300 -0.350 -40 -20 0 20 40 60 TA - TEMPERATURE - °C 80 100 -1 -1.5 3.0 ICC - SUPPLY CURRENT - mA IOH - OUTPUT HIGH CURRENT - A -0.100 3.5 -0.5 -2 -2.5 -3 -4 -40 2.5 2.0 1.5 1.0 0.5 -3.5 -20 0 20 40 60 TA - TEMPERATURE - °C 80 0.0 -40 100 Figure 5: ICC vs. VCC 3 10 VO - OUTPUT VOLTAGE - V 12 2.5 2 1.5 IIccL CCL IF = 9 mA for ICCH V F = 0V for I CCL T A = 25°C V EE = 0V 1 0.5 10 Broadcom 12 IF = 9 mA for ICCH V F = 0V for I CCL V CC = 10V V EE = 0V -20 0 IIccL CCL IIccH CCH 20 40 60 TA - TEMPERATURE - °C 80 100 Figure 6: IFLH Hysteresis 3.5 0 IF = 9 mA IOUT = -100 mA V CC = 10V V EE = 0V -0.050 Figure 4: ICC vs. Temperature 0 ICC - SUPPLY CURRENT - mA 0.000 IIccH CCH T A = 25°C V CC = 10V V EE = 0V 8 6 IFLHON IfLH 4 IfHL IFLHOFF 2 14 16 VCC - SUPPLY VOLTAGE - V 18 20 0 0 0.5 1 1.5 2 2.5 IFLH - LOW TO HIGH CURRENT THRESHOLD - mA 3 AV02-4079EN 10 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Figure 7: IFLH vs. Temperature Figure 8: Propagation Delay vs. IF 70 IFLH - LOW TO HIGH CURRENT THRESHOLD - mA 2.5 TP - PROPAGATION DELAY - ns 2.0 1.5 1.0 V CC = 10V V EE = 0V 0.5 0.0 IFLH ON IfLH -40 -20 0 IFLH OFF ifHL 20 40 60 TA - TEMPERATURE - °C 80 60 55 50 TPLH TpLH 45 TPHL TpHL 40 100 Figure 9: Propagation Delay vs. Temperature 7 7.5 8 8.5 9 9.5 10 IF - FORWARD LED CURRENT - mA 11 60 IF = 9 mA V CC = 10V, V EE = 0V R g= 10Ω, C g = 10 nF DUTY CYCLE = 50% f = 200 kHz 60 59 TP - PROPAGATION DELAY - ns TP - PROPAGATION DELAY - ns 65 55 TPLH TpLH 50 45 -40 -20 0 20 40 TA - TEMPERATURE - °C 60 IF = 9 mA, T A = 25°C V CC = 10V, V EE = 0V C g= 10 nF DUTY CYCLE = 50% f = 200 kHz 58 57 56 TPLH TpLH TpHL TPHL 55 54 53 TPHL TpHL 80 52 100 Figure 11: Propagation Delay vs. Cg 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Rg - SERIES LOAD RESISTANCE - Ω Figure 12: Rise and Fall Time vs. Cg 40 70 60 35 TR/TF - RISE & FALL TIME - ns IF = 9 mA, T A = 25°C V CC = 10V, V EE = 0V R g= 10Ω, DUTY CYCLE = 50% f = 200 kHz 65 TPLH TPLH TPHL TPHL 55 50 IF = 9 mA, T A = 25°C V CC = 10V, VEE = 0V DUTY CYCLE = 50% f = 200 kHz 30 25 20 15 TrTR 10 TfTF 5 45 10.5 Figure 10: Propagation Delay vs. Rg 70 TP - PROPAGATION DELAY - ns V CC = 10V, V EE = 0V T A = 25°C R g= 10Ω, C g = 10 nF DUTY CYCLE = 50% f = 200 kHz 65 0 Broadcom 5 10 15 Cg - SERIES LOAD CAPACITANCE - nF 20 0 0 1 2 3 4 5 6 7 Cg - SERIES LOAD CAPACITANCE - nF 8 9 10 AV02-4079EN 11 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Figure 13: Input Current vs. Forward Voltage IF - FORWARD CURRENT - mA 100 10 1 0.1 1.4 1.45 1.5 1.55 1.6 1.65 VF - FORWARD VOLTAGE - V 1.7 1.75 1.8 Figure 14: tr and tf Test Circuit and Waveforms IF 1 IF = 7 to 11 mA , 200 kHz, 50% Duty Cycle 6 tr 1 μF 2 VO 5 + _ 90% 50% 1 nF 3 tf V CC = 10V V OUT 10% 4 tPLH tPHL Figure 15: .CMR Test Circuit with Split Resistors Network 232 Ω 5V 1 6 2 5 3 4 + _ 1 μF VO V CC = 20V + _ + _ 154 Ω V CM = 1500V Broadcom AV02-4079EN 12 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Application Information Product Overview Description The ACPL-P345/W345 is an optically isolated power output stage capable of driving power, GaN, or SiC MOSFET. Based on BCDMOS technology, this gate drive optocoupler delivers higher peak output current, better rail-to-rail output voltage performance and two times faster speed than the previous generation products. The high peak output current and short propagation delay are needed for fast MOSFET switching to reduce dead time and improve system overall efficiency. Rail-to-rail output voltage ensures that the MOSFET’s gate voltage is driven to the optimum intended level with no power loss across the MOSFET. This helps the designer lower the system power which is suitable for bootstrap power supply operation. It has very high CMR (common mode rejection) rating that allows the microcontroller and the MOSFET to operate at very large common mode noise found in industrial motor drives and other power switching applications. The input is driven by direct LED current and has a hysteresis that prevents output oscillation if insufficient LED driving current is applied. This will eliminates the need of additional Schmitt trigger circuit at the input LED. The stretched SO6 package which is up to 50% smaller than conventional DIP package facilitates smaller more compact design. These stretched packages are compliant to many industrial safety standards, such as IEC/EN/DIN EN 60747-5-5, UL 1577 and CSA. Recommended Application Circuit The recommended application circuit shown in Figure 16 illustrates a typical gate drive implementation using the ACPL-P345. The supply bypass capacitors (1 µF) provide the large transient currents necessary during a switching transition. Because of the transient nature of the charging currents, a low current (4.0 mA) power supply will be enough to power the device. The split resistors (in the ratio of 1.5:1) across the LED will provide a high CMR response by providing a balanced resistance network across the LED. The gate resistor RG serves to limit gate charge current and controls the MOSFET switching times. In PC board design, care should be taken to avoid routing the MOSFET drain or source traces close to the ACPL-P345 input as this can result in unwanted coupling of transient signals into ACPL-P345 and degrade performance. The stretched SO6 package which is up to 50% smaller than conventional DIP package facilitates smaller and more compact design. These stretched packages are compliant to many industrial safety standards such as IEC/EN/DIN EN 60747-5-5, UL 1577 and CSA. Figure 16: Recommended Application Circuit with Split Resistors LED 232Ω + _ ANODE 1 NC 2 154Ω CATHODE 3 VCC 6 VOUT 5 VEE 4 1 μF Rg VCC =10V + _ + HVDC Q1 Q2 Broadcom - HVDC AV02-4079EN 13 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Selecting the Gate Resistor (RG) Step 1: Calculate Rg minimum from the IOL peak specification. The MOSFET and Rg in Figure 16 can be analyzed as a simple RC circuit with a voltage supplied by ACPL-P345/W345. Rg t VCC VEE I OLPEAK 10  0V 1A 10 : The external gate resistor, Rg and internal minimum turn-on resistance, RDSON will ensure the output current will not exceed the device absolute maximum rating of 1.0A. Figure 17: Recommended High-CMR Drive Circuit VDD = 5.0V: R 1 = 232 Ω r1% R 2 = 154 Ω r1% R 1 /R2 ≈ 1.5 +5V R 1 ANODE 1 ILP C LA 2 μC R2 3 CATHODE 6 VCC 5 VOUT ILN C LC 4 VEE LED Drive Circuit Considerations for High CMR Performance Figure 17 shows the recommended drive circuit for the ACPL-P345/W345 that gives optimum common-mode rejection. The two current setting resistors balance the common mode impedances at the LED’s anode and cathode. Common-mode transients can be capacitive coupled from the LED anode, through CLA (or cathode through CLC) to the output-side ground causing current to be shunted away from the LED (which is not wanted when the LED should be on) or conversely cause current to be injected into the LED (which is not wanted when the LED should be off). Table 1 shows the directions of ILP and ILN depend on the polarity of the common-mode transient. For transients occurring when the LED is on, common-mode rejection (CMH, since the output is at "high" state) depends on LED current (IF). For conditions where IF is close to the switching threshold (IFLH), CMH also depends on the extent to which ILP and ILN balance each other. In other words, any condition where a common-mode transient causes a momentary decrease in IF (meaning when dVCM/dt > 0 and |ILP| > |ILN|, referring to Table 1) will cause a common-mode failure for transients which are fast enough. Likewise for a common-mode transient that occurs when the LED is off (that is, CML, since the output is at "low" state), if an imbalance between ILP and ILN results in a transient IF equal to or greater than the switching threshold of the optocoupler, the transient “signal” may cause the output to spike above 1V, which constitutes a CML failure. The balanced ILED-setting resistors help equalize the common mode voltage change at the anode and cathode. The shunt drive input circuit will also help to achieve high CML performance by shunting the LED in the off state. Table 1: Common Mode Pulse Polarity and LED Current Transients dVCM/dt ILP Direction Positive (>0) Away from LED anode through CLA Away from LED cathode through CLC Negative( |ILN|, IF Is Momentarily Increase Decrease Decrease Increase AV02-4079EN 14 ACPL-P345 and ACPL-W345 Data Sheet 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 Dead Time and Propagation Delay Specifications Figure 18: Minimum LED Skew for Zero Dead Time The ACPL-P345/W345 includes a Propagation Delay Difference (PDD) specification intended to help designers minimize “dead time” in their power inverter designs. Dead time is the time period during which both the high and low side power transistors (Q1 and Q2 in Figure 16) are off. Any overlap in Q1 and Q2 conduction will result in large currents flowing through the power devices between the high and low voltage motor rails. VOUT1 To minimize dead time in a given design, the turn on of LED2 should be delayed (relative to the turn off of LED1) so that under worst-case conditions, transistor Q1 has just turned off when transistor Q2 turns on, as shown in Figure 18. The amount of delay necessary to achieve this condition is equal to the maximum value of the propagation delay difference specification, PDDMAX, which is specified to be 100 ns over the operating temperature range of –40°C to 105°C. Delaying the LED signal by the maximum propagation delay difference ensures that the minimum dead time is zero, but it does not tell a designer what the maximum dead time will be. The maximum dead time is equivalent to the difference between the maximum and minimum propagation delay difference specifications as shown in Figure 19. The maximum dead time for the ACPL-P345/W345 is 100 ns (= 50 ns – (–50 ns)) over an operating temperature range of –40°C to 105°C. Note that the propagation delays used to calculate PDD and dead time are taken at equal temperatures and test conditions since the optocouplers under consideration are typically mounted in close proximity to each other and are switching identical MOSFETs. LED Current Input with Hysteresis ILED1 VOUT2 ILED2 Q1 ON Q1 OFF Q2 ON Q2 OFF tPHL MAX tPLH MIN PDD* MAX = (tPHL - tPLH) MAX = tPHL MAX - tPLH MIN Note: For PDD calculations, the propagation delays are taken at the same temperature and test conditions. Figure 19: Waveforms for Dead Time ILED1 VOUT1 VOUT2 ILED2 Q1 ON Q1 OFF Q2 ON Q2 OFF tPLH MIN tPHL MAX tPLH MIN (tPHL - tPLH) MAX tPLH MAX PDD* MAX MAXIMUM DEAD TIME (DUE TO OPTOCOUPLER) = (tPHL MAX - tPHL MIN) + (tPLH MAX - tPLH MIN) = (tPHL MAX - tPLH MIN) + (tPHL MIN - tPLH MAX) = PDD* MAX - PDD* MIN Note: For Dead Time and PDD calculations, all propagation delays are taken at the same temperature and test conditions. The detector has optical receiver input stage with built in Schmitt trigger to provide logic compatible waveforms, eliminating the need for additional wave shaping. The hysteresis (Figure 6) provides differential mode noise immunity and minimizes the potential for output signal chatter. Broadcom AV02-4079EN 15 1.0-Amp Output Current Power, GaN, and SiC MOSFET Gate Drive Optocoupler with Railto-Rail Output Voltage in Stretched SO6 ACPL-P345 and ACPL-W345 Data Sheet Thermal Model for ACPL-P347/ W347 Stretched SO6 Package Optocoupler Definitions: This thermal model assumes that an 6-pin single-channel plastic package optocoupler is soldered into a 7.62 cm × 7.62 cm printed circuit board (PCB) per JEDEC standards. The temperature at the LED and Detector junctions of the optocoupler can be calculated using the following equations. R11: Junction to Ambient Thermal Resistance of LED due to heating of LED Equation 1: R12: Junction to Ambient Thermal Resistance of LED due to heating of Detector (Output IC) R21: Junction to Ambient Thermal Resistance of Detector (Output IC) due to heating of LED. R22: Junction to Ambient Thermal Resistance of Detector (Output IC) due to heating of Detector (Output IC). P1: Power dissipation of LED (W). P2: Power dissipation of Detector/Output IC (W). T1: Junction temperature of LED (°C). T2: Junction temperature of Detector (°C). Ta: Ambient temperature. T1 = (R11 × P1 + R12 × P2) + Ta Equation 2: T2 = (R21 × P1 + R22 × P2) + Ta Using the given thermal resistances and thermal model formula in this data sheet, we can calculate the junction temperature for both LED and the output detector. Both junction temperatures should be within the absolute maximum rating. Ambient Temperature: Junction to Ambient Thermal Resistances were measured approximately 1.25 cm above the optocoupler at ~23°C in still air Thermal Resistance °C/W R11 135 R12 27 R21 39 R22 47 Related Documents AV02-0421EN Applicaiton Note 5336 Gate Drive Optocoupler Basic Design for IGBT / MOSFET AV02-3698EN Application Note 1043 Common-Mode Noise: Sources and Solutions AV02-0310EN Reliability Data Plastics Optocouplers Product ESD and Moisture Sensitivity Broadcom AV02-4079EN 16 Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries and/or the EU. Copyright © 2017–2018 by Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. For more information, please visit www.broadcom.com. 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