Isolated Precision Half-Bridge Driver, 4 A Output ADuM7234 FEATURES GENERAL DESCRIPTION Isolated high-side and low-side outputs Working Voltage High-side or low-side relative to input: ±350 V peak High-side/low-side differential: 350 V peak 4 A peak output current High frequency operation: 1 MHz maximum High common-mode transient immunity: >25 kV/μs High temperature operation: 105°C Narrow body, 16-lead SOIC Safety and regulatory approvals (pending) UL recognition UL 1577 1000 V rms input-to-output withstand voltage The ADuM7234 1 is an isolated, half-bridge gate driver that employs the Analog Devices, Inc., iCoupler® technology to provide independent and isolated high-side and low-side outputs. Combining high speed CMOS and monolithic transformer technology, this isolation component provides outstanding performance characteristics superior to optocoupler-based solutions. APPLICATIONS In comparison to gate drivers employing high voltage level translation methodologies, the ADuM7234 offers the benefit of true, galvanic isolation between the input and each output and between each input. Each output may be operated up to ±350 V peak relative to the input, thereby supporting low-side switching to negative voltages. The differential voltage between the high side and low side may be as high as 350 V peak. By avoiding the use of LEDs and photodiodes, this iCoupler gate drive device is able to provide precision timing characteristics not possible with optocouplers. Furthermore, the reliability and performance stability problems associated with optocoupler LEDs are avoided. Isolated IGBT/MOSFET gate drives Plasma displays Industrial inverters Switching power supplies As a result, the ADuM7234 provides reliable control over the switching characteristics of IGBT/MOSFET configurations over a wide range of positive or negative switching voltages. FUNCTIONAL BLOCK DIAGRAM VIA 2 ADuM7234 ENCODE 16 VDDA DECODE VIB 3 15 VOA 14 GNDA VDD1 4 13 NC GND1 5 12 NC DISABLE 6 VDD1 7 11 VDDB ENCODE NC 8 DECODE 10 VOB 9 GNDB 07990-001 NC 1 Figure 1. 1 Protected by U.S. Patents 5,952,849 and 6,291,907. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved. ADuM7234 TABLE OF CONTENTS Features .............................................................................................. 1 Regulatory Information ................................................................4 Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................5 General Description ......................................................................... 1 ESD Caution...................................................................................5 Functional Block Diagram .............................................................. 1 Pin Configuration and Function Descriptions..............................6 Revision History ............................................................................... 2 Typical Performance Characteristics ..............................................7 Specifications..................................................................................... 3 Applications Information .................................................................8 Electrical Characteristics ............................................................. 3 Common-Mode Transient Immunity ........................................8 Package Characteristics ............................................................... 4 Insulation Lifetime ........................................................................9 Insulation and Safety-Related Specifications ............................ 4 Outline Dimensions ....................................................................... 10 Recommended Operating Conditions ...................................... 4 Ordering Guide .......................................................................... 10 REVISION HISTORY 1/10—Rev. Sp0 to Rev. A Changes to Table 1 ............................................................................ 3 1/09—Revision Sp0: Initial Version Rev. A | Page 2 of 12 ADuM7234 SPECIFICATIONS ELECTRICAL CHARACTERISTICS All voltages are relative to their respective ground. 4.5 V ≤ VDD1 ≤ 5.5 V, 12 V ≤ VDDA ≤ 18 V, 12 V ≤ VDDB ≤ 18 V. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are at TA = 25°C, VDD1 = 5 V, VDDA = 15 V, VDDB = 15 V. Table 1. Parameter DC SPECIFICATIONS Input Supply Current, Quiescent Output Supply Current A or Output Supply Current B, Quiescent Input Supply Current, 2 Mbps Output Supply Current A or Output Supply Current B, 2 Mbps Input Currents Logic High Input Threshold Logic Low Input Threshold Logic High Output Voltages Logic Low Output Voltages Undervoltage Lockout, VDDA or VDDB Supply Positive-Going Threshold Negative-Going Threshold Hysteresis Output Short-Circuit Pulsed Current 1 SWITCHING SPECIFICATIONS Minimum Pulse Width 2 Maximum Switching Frequency 3 Propagation Delay 4 Change vs. Temperature Pulse Width Distortion, |tPLH − tPHL| Channel-to-Channel Matching, Rising or Falling Edges 5 Channel-to-Channel Matching, Rising vs. Falling Edges 6 Part-to-Part Matching, Rising or Falling Edges 7 Part-to-Part Matching, Rising vs. Falling Edges 8 Output Rise/Fall Time (10% to 90%) Symbol Min Typ Max Unit IDDI(Q) IDDA(Q), IDDB(Q) 1.0 1.5 2.2 3.2 mA mA IDDI(2) IDDA(2), IDDB(2) 1.4 22 3.0 30 mA mA −10 0.7 × VDD1 +0.01 +10 VDDA − 0.15, VDDB − 0.15 VDDA, VDDB μA V V V IOA, IOB = −20 mA V IOA, IOB = 20 mA IIA, IIB, IDISABLE VIH VIL VOAH,VOBH 0.3 × VDD1 VOAL,VOBL 0.15 VDDBUV+ VDDBUVVDDBUVH IOA(SC), IOB(SC) 8.0 7.4 0.3 2.0 8.9 8.2 0.7 4.0 PW tPHL, tPLH 160 130 PWD tR/tF 8 1 14 CL = 1000 pF 0 ≤ VIA, VIB, VDISABLE ≤ VDD1 9.8 9.0 A 100 2 130 Test Conditions 14 11 ns Mbps ns ps/°C ns ns CL = 1000 pF CL = 1000 pF CL = 1000 pF CL = 1000 pF CL = 1000 pF CL = 1000 pF 25 ns CL = 1000 pF 55 63 30 ns ns ns CL = 1000 pF, input tr = 3 ns CL = 1000 pF, input tr = 3 ns CL = 1000 pF 200 Short-circuit duration less than 1 second. Average power must conform to the limit shown under the Absolute Maximum Ratings. The minimum pulse width is the shortest pulse width at which the specified timing parameters are guaranteed. The maximum switching frequency is the maximum signal frequency at which the specified timing parameters are guaranteed. 4 tPHL propagation delay is measured from the 50% level of the falling edge of the VIx signal to the 50% level of the falling edge of the VOx signal. tPLH propagation delay is measured from the 50% level of the rising edge of the VIx signal to the 50% level of the rising edge of the VOx signal. 5 Channel-to-channel matching, rising, or falling edges, is the magnitude of the propagation delay difference between two channels of the same part when the inputs are either both rising or falling edges. The supply voltages and the loads on each channel are equal. 6 Channel-to-channel matching, rising vs. falling edges is the magnitude of the propagation delay difference between two channels of the same part when one input is a rising edge and the other input is a falling edge. The supply voltages and loads on each channel are equal. 7 Part-to-part matching, rising or falling edges, is the magnitude of the propagation delay difference between the same channels of two different parts when the inputs are either both rising or falling edges. The supply voltages, temperatures, and loads of each part are equal. 8 Part-to-part matching, rising vs. falling edges, is the magnitude of the propagation delay difference between the same channels of two different parts when one input is a rising edge and the other input is a falling edge. The supply voltages, temperatures, and loads of each part are equal. 2 3 Rev. A | Page 3 of 12 ADuM7234 PACKAGE CHARACTERISTICS Table 2. Parameter Resistance (Input-to-Output) 1 Capacitance (Input-to-Output)1 Input Capacitance IC Junction-to-Ambient Thermal Resistance 1 Symbol RI-O CI-O CI θJA Min Typ 1012 2.0 4.0 76 Max Unit Ω pF pF °C/W Test Conditions f = 1 MHz The device is considered a 2-terminal device: Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together. INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 3. Parameter Rated Dielectric Insulation Voltage Minimum External Air Gap (Clearance) Symbol Minimum External Tracking (Creepage) Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group Maximum Working Voltage Compatible with 50 Years Service Life L(I01) Value 1000 4.0 min Unit V rms mm L(I02) 4.0 min mm 0.025 min >600 I 354 mm V CTI VIORM V peak Conditions 1 minute duration Measured from input terminals to output terminals, shortest distance through air Measured from input terminals to output terminals, shortest distance path along body Insulation distance through insulation DIN IEC 112/VDE 0303 Part 1 Material Group (DIN VDE 0110, 1/89, Table 1) Continuous peak voltage across the isolation barrier RECOMMENDED OPERATING CONDITIONS Table 4. Parameter Operating Temperature Input Supply Voltage 1 Output Supply Voltages1 Input Signal Rise and Fall Times Common-Mode Transient Immunity, Input-to-Output 2 Common-Mode Transient Immunity, Between Outputs2 Transient Immunity, Supply Voltages2 1 2 Symbol TA VDD1 VDDA, VDDB Min −40 4.5 12 −35 −35 −35 Max +105 5.5 18 100 +35 +35 +35 Unit °C V V ns kV/μs kV/μs kV/μs All voltages are relative to their respective ground. See the Common-Mode Transient Immunity section for additional data. REGULATORY INFORMATION The ADuM7234 is approved by the organization listed in Table 5. Table 5. UL (Pending) Recognized under 1577 component recognition program 1 Single/basic insulation, 1000 V rms isolation voltage File E214100 1 In accordance with UL 1577, each ADuM7234 is proof tested by applying an insulation test voltage of 1200 V rms for 1 sec (current leakage detection limit = 5 μA). Rev. A | Page 4 of 12 ADuM7234 ABSOLUTE MAXIMUM RATINGS Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; Functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 6. Parameter Storage Temperature (TST) Ambient Operating Temperature (TA) Input Supply Voltage (VDD1) 1 Output Supply Voltage1 (VDDA, VDDB) Input Voltage1 (VIA, VIB) Output Voltage1 VOA VOB Input-to-Output Voltage 2 Output Differential Voltage 3 Output DC Current (IOA, IOB) Common-Mode Transients 4 Rating −55°C to +150°C −40°C to +105°C −0.5 V to +7.0 V −0.5 V to +27 V −0.5 V to VDDI + 0.5 V Ambient temperature = 25°C, unless otherwise noted. −0.5 V to VDDA + 0.5 V −0.5 V to VDDB + 0.5 V −350 V peak to +350 V peak 350 V peak −800 mA to +800 mA −100 kV/μs to +100 kV/μs ESD CAUTION 1 All voltages are relative to their respective ground. Input-to-output voltage is defined as GNDA − GND1 or GNDB − GND1. 3 Output differential voltage is defined as GNDA − GNDB. 4 Refers to common-mode transients across any insulation barrier. Common-mode transients exceeding the absolute maximum ratings may cause latch-up or permanent damage. 2 Rev. A | Page 5 of 12 ADuM7234 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS NC 1 16 VDDA VIA 2 15 VOA VDD1 4 GND1 5 ADuM7234 TOP VIEW (Not to Scale) DISABLE 6 14 GNDA 13 NC 12 NC 11 VDDB VDD1 7 10 VOB NC 8 9 GNDB NC = NO CONNECT 07990-002 VIB 3 Figure 2. Pin Configuration Table 7. ADuM7234 Pin Function Descriptions Pin No. 1, 8, 12 13 2 3 4, 7 Mnemonic NC VIA VIB VDD1 5 6 9 10 11 14 15 16 GND1 DISABLE GNDB VOB VDDB GNDA VOA VDDA Description No Connect. Pin 12 and Pin 13 are floating and should be left unconnected. Logic Input A. Logic Input B. Input Supply Voltage, 4.5 V to 5.5 V. Pin 4 and Pin 7 are internally connected. Connecting both pins to VDD1 is recommended. Ground Reference for Input Logic Signals. Input Disable. Disables the isolator inputs and refresh circuits. Outputs take on the default low state. Ground Reference for Output B. Output B. Output B Supply Voltage, 12 V to 18 V. Ground Reference for Output A. Output A. Output A Supply Voltage, 12 V to 18 V. Table 8. Truth Table (Positive Logic) VIA/VIB Input H L X X VDD1 State Powered Powered Unpowered Powered DISABLE L L X H VOA/VOB Output H L L L Notes Output returns to the input state within 1 μs of VDD1 power restoration. Rev. A | Page 6 of 12 ADuM7234 1.2 166 1.0 164 PROPAGATION DELAY (ns) 0.8 0.6 0.4 0.2 CHANNEL B FALL 162 160 158 CHANNEL A RISE 156 CHANNEL B RISE 154 0 0.5 1.0 DATA RATE (Mbps) 1.5 2.0 152 4.5 07990-012 0 Figure 3. Typical Input Supply Current Variation with Data Rate 5.0 INPUT SUPPLY VOLTAGE (V) 5.5 Figure 6. Typical Propagation Delay Variation with Input Supply Voltage (Output Supply Voltage = 15.0 V) 166 25 164 PROPAGATION DELAY (ns) 20 OUTPUT CURRENT (mA) CHANNEL A FALL 07990-015 INPUT CURRENT (mA) TYPICAL PERFORMANCE CHARACTERISTICS 15 10 5 CHANNEL A FALL CHANNEL B FALL 162 160 158 CHANNEL A RISE 156 CHANNEL B RISE 0 0.5 1.0 DATA RATE (Mbps) 1.5 2.0 152 12 07990-013 0 155 150 145 0 20 40 60 TEMPERATURE (°C) 80 100 120 07990-014 PROPAGATION DELAY (ns) 160 –20 18 Figure 7. Typical Propagation Delay Variation with Output Supply Voltage (Input Supply Voltage = 5.0 V) Figure 4. Typical Output Supply Current Variation with Data Rate 140 –40 15 OUTPUT SUPPLY VOLTAGE (V) 07990-016 154 Figure 5. Typical Propagation Delay Variation with Temperature Rev. A | Page 7 of 12 ADuM7234 APPLICATIONS INFORMATION COMMON-MODE TRANSIENT IMMUNITY In general, common-mode transients consist of linear and sinusoidal components. The linear component of a commonmode transient is given by VCM, linear = (ΔV/Δt)t where ΔV/Δt is the slope of the transient shown in Figure 11 and Figure 12. Figure 9 and Figure 10 characterize the ability of the ADuM7234 to operate correctly in the presence of sinusoidal transients. The data is based on design simulation and is the maximum sinusoidal transient magnitude (2πf V0) that the ADuM7234 can tolerate without an operational error. Values for immunity against sinusoidal transients are not included in Table 4 because measurements to obtain such values have not been possible. 250 The transient of the linear component is given by Figure 8 characterizes the ability of the ADuM7234 to operate correctly in the presence of linear transients. The data, based on design simulation, is the maximum linear transient magnitude that the ADuM7234 can tolerate without an operational error. This data shows a correlation with the data that is listed in Table 4, which is based on measured data. 50 TRANSIENT IMMUNITY (kV/µs) 200 dVCM/dt = ΔV/Δt 150 BEST-CASE PROCESS VARIATION WORST-CASE PROCESS VARIATION 100 50 0 0 35 250 500 750 1000 1250 FREQUENCY (MHz) 1500 1750 2000 Figure 9. Transient Immunity (Sinusoidal Transients), 27°C Ambient Temperature 30 250 25 20 BEST-CASE PROCESS VARIATION WORST-CASE PROCESS VARIATION 15 TRANSIENT IMMUNITY (kV/µs) TRANSIENT IMMUNITY (kV/µs) 40 07990-004 45 10 0 –40 –20 0 20 40 TEMPERATURE (°C) 60 80 100 07990-003 5 Figure 8. Transient Immunity (Linear Transients) vs. Temperature The sinusoidal component (at a given frequency) is given by 200 150 BEST-CASE PROCESS VARIATION WORST-CASE PROCESS VARIATION 100 50 0 where: V0 is the magnitude of the sinusoidal. f is the frequency of the sinusoidal. 0 250 500 750 1000 1250 FREQUENCY (MHz) 1500 1750 Figure 10. Transient Immunity (Sinusoidal Transients), 100°C Ambient Temperature The transient magnitude of the sinusoidal component is given by dVCM/dt = 2πf V0 Rev. A | Page 8 of 12 2000 07990-005 VCM, sinusoidal = V0sin(2πft) ADuM7234 15V ΔV Δt Figure 11. Common-Mode Transient Immunity Waveforms, Input to Output VDDA /VDDB GNDA/GNDB VDDB /VDDA GNDA/GNDB 15V ΔV VDDA /VDDB GNDA/GNDB VDDB /VDDA GNDB/GNDA 15V 15V Δt ΔV 15V 15V Δt 07990-007 15V Figure 12. Common-Mode Transient Immunity Waveforms, Between Outputs VDDA /VDDB ΔVDD Δt GNDA/GNDB GNDA/GNDB 07990-008 VDDA /VDDB Figure 13. Transient Immunity Waveforms, Output Supplies INSULATION LIFETIME All insulation structures eventually break down when subjected to voltage stress over a sufficiently long period. The rate of insulation degradation depends on the characteristics of the voltage waveform applied across the insulation. In addition to the testing performed by the regulatory agencies, Analog Devices conducts an extensive set of evaluations to determine the lifetime of the insulation structure within the ADuM7234. Bipolar ac voltage is the most stringent environment. The goal of a 50-year operating lifetime under the ac bipolar condition determines the maximum working voltage recommended by Analog Devices. In the case of unipolar ac or dc voltage, the stress on the insulation is significantly lower. This allows operation at higher working voltages while still achieving a 50-year service life. The working voltage listed in Table 3 can be applied while maintaining the 50-year minimum lifetime provided the voltage conforms to either the unipolar ac or dc voltage cases. Any cross insulation voltage waveform that does not conform to Figure 15 or Figure 16 should be treated as a bipolar ac waveform, and its peak voltage should be limited to the 50-year lifetime voltage value listed in Table 3. Note that the voltage presented in Figure 15 is shown as sinusoidal for illustration purposes only. It is meant to represent any voltage waveform varying between 0 V and some limiting value. The limiting value can be positive or negative, but the voltage cannot cross 0 V. Analog Devices performs accelerated life testing using voltage levels higher than the rated continuous working voltage. Acceleration factors for several operating conditions are determined. These factors allow calculation of the time to failure at the actual working voltage. Table 3 lists the peak voltage for 50 years of service life for a bipolar ac operating condition and the maximum Analog Devices recommended working voltage. In many cases, the approved working voltage is higher than the 50year service life voltage. Operation at these high working voltages can lead to shortened insulation life in some cases. Rev. A | Page 9 of 12 RATED PEAK VOLTAGE 07990-009 Δt 5V The insulation lifetime of the ADuM7234 depends on the voltage waveform type imposed across the isolation barrier. The iCoupler insulation structure degrades at different rates depending on whether the waveform is bipolar ac, unipolar ac, or dc. Figure 14, Figure 15, and Figure 16 illustrate these different isolation voltage waveforms. 0V Figure 14. Bipolar AC Waveform RATED PEAK VOLTAGE 07990-010 15V VDDA AND VDDB GNDA AND GNDB ΔV 15V 5V 0V Figure 15. Unipolar AC Waveform RATED PEAK VOLTAGE 07990-011 VDDA AND VDDB GNDA AND GNDB VDD1 GND1 VDD1 GND1 07990-006 15V 0V Figure 16. DC Waveform ADuM7234 OUTLINE DIMENSIONS 10.00 (0.3937) 9.80 (0.3858) 4.00 (0.1575) 3.80 (0.1496) 9 16 1 8 6.20 (0.2441) 5.80 (0.2283) 1.27 (0.0500) BSC 1.75 (0.0689) 1.35 (0.0531) 0.25 (0.0098) 0.10 (0.0039) COPLANARITY 0.10 SEATING PLANE 0.51 (0.0201) 0.31 (0.0122) 0.50 (0.0197) 0.25 (0.0098) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 060606-A COMPLIANT TO JEDEC STANDARDS MS-012-AC CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 17. 16-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-16) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model 1 ADuM7234BRZ ADuM7234BRZ-RL7 1 No. of Channels 2 2 Output Peak Current (A) 4 4 Output Voltage (V) 15 15 Temperature Range −40°C to +105°C −40°C to +105°C Z = RoHS Compliant Part. Rev. A | Page 10 of 12 Package Description 16-Lead SOIC_N 16-Lead SOIC_N, 7-Inch Tape and Reel Option (1,000 Units) Package Option R-16 R-16 ADuM7234 NOTES Rev. A | Page 11 of 12 ADuM7234 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07990-0-1/10(A) Rev. A | Page 12 of 12