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| July 13, 2009 Automotive Grade AUIR2085S HIGH SPEED, 100V, SELF OSCILLATING 50% DUTY CYCLE, HALF-BRIDGE DRIVER Features * * * * * * * * * * * Product Summary Half-Bridge 100 V 1.0A & 1.0A 500kHz 50ns - 200ns +/- 25ns Simple primary side control solution to enable halfTopology bridge DC-Bus Converters for 48V distributed systems with reduced component count and board space VOFFSET Integrated 50% duty cycle oscillator & half-bridge driver Io+ & I o- (typical) IC in a single SO-8 package Programmable switching frequency with up to 500kHz fOSC (max) max per channel +/- 1A drive current capability optimized for low charge Deadtime MOSFETs HO/LO Pulse Matching Adjustable dead-time 50ns - 200ns Floating channel designed for bootstrap operation up to +100Vdc High and low side pulse width matching to +/- 25ns Package Options Adjustable overcurrent protection Undervoltage lockout and internal soft start Leadfree, RoHS compliant Automotive qualified* Typical Applications * * * DC-DC Converters HEV Auxiliary Converter Battery Management Converters 8 - Lead SOIC AUIR2085S Typical Connection Diagram COM * Qualification standards can be found on IR's web site www.irf.com AUIRS2085 AUIR2085S (c) 2008 International Rectifier AUIR2085S Table of Contents Typical Connection Diagram Description/Feature Comparison Qualification Information Absolute Maximum Ratings Recommended Operating Conditions Dynamic Electrical Characteristics Static Electrical Characteristics Functional Block Diagram Input/Output Pin Equivalent Circuit Diagram Lead Definitions Lead Assignments Package Details Tape and Reel Details Part Marking Information Ordering Information Page 1 3 4 5 5 6 6 7 9 10 10 12 13 14 15 www.irf.com (c) 2008 International Rectifier 2 AUIR2085S Description The AUIR2085S is a self oscillating half-bridge driver IC with 50% duty cycle ideally suited for 36V - 75V half-bridge DC-bus converters. This product is also suitable for push-pull converters without restriction on input voltage. Each channel frequency is equal to fOSC, which can be set by selecting RT & CT, where fOSC = 1/(2*RT.CT). Dead-time can be controlled through proper selection of CT and can range from 50ns to 200ns. Internal soft-start increases the pulse width during power up and maintains pulse width matching for the high and low outputs throughout the start up cycle. Typically soft-start duty cycle varies beginning from 5-10% ramping up to about 50% over 1000 cycles. The AUIR2085S initiates a soft start at power up and after every overcurrent condition. Undervoltage lockout prevents operation if VCC is less than 7.5V. www.irf.com (c) 2008 International Rectifier 3 AUIR2085S Qualification Information Qualification Level Automotive (per AEC-Q100) Comments: This family of ICs has passed an Automotive qualification. IR's Industrial and Consumer qualification level is granted by extension of the higher Automotive level. MSL3 260C SOIC8N (per IPC/JEDEC J-STD-020) Class M3 (per AEC-Q100-003) Class H2 (per AEC-Q100-002) Class C5 (per AEC-Q100-011) Class II, Level B (per AEC-Q100-004) Yes Moisture Sensitivity Level ESD Machine Model Human Body Model Charged Device Model IC Latch-Up Test RoHS Compliant Qualification standards can be found at International Rectifier's web site http://www.irf.com/ Exceptions to AEC-Q100 requirements are noted in the qualification report. Higher MSL ratings may be available for the specific package types listed here. Please contact your International Rectifier sales representative for further information. www.irf.com (c) 2008 International Rectifier 4 AUIR2085S Absolute Maximum Ratings Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM. The thermal resistance and power dissipation ratings are measured under board mounted and still air conditions. Symbol VB VCC VS VHO VLO OSC VCS dVs/dt ICC PD RthJA TJ TS TL Definition High side floating supply voltage Low side supply voltage High side floating supply offset voltage High side floating output voltage Low side output voltage OSC pin voltage CS pin voltage Allowable offset voltage slew rate Supply current Package power dissipation @ TA 25C Thermal resistance, junction to ambient Junction temperature Storage temperature Lead temperature (soldering, 10 seconds) Min. -0.3 -- VB - 25 VB - 0.3 -0.3 -0.3 -0.3 -- -- -- -- -- -55 -- Max. 150 25 VB + 0.3 VB + 0.3 VCC + 0.3 VCC + 0.3 VCC + 0.3 50 20 0.625 200 150 150 300 V Units V/ns mA W C/W C Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol Definition Min. Max. Units VB High side floating supply voltage VS + 10 VS + 15 V VS Steady state high side floating supply offset voltage 100 -5 () VCC Supply voltage 10 15 ICC Supply current -- 5 mA RT Timing resistor 10 100 k CT Timing capacitor 47 470 pF fosc Operating frequency (per channel) -- 500 kHz TA Ambient temperature -40 125 C Care should be taken to avoid output switching conditions where the VS node flies inductively below ground by more than 5V. www.irf.com (c) 2008 International Rectifier 5 AUIR2085S Dynamic Electrical Characteristics VCC = VBS = 12V, CLOAD = 1000pF, and TA = 25C unless otherwise specified. Symbol tr tf fOSC tDT tDCS PM Definition Turn-on rise time Turn-off fall time Per channel output frequency HO/LO output dead time Overcurrent shut down delay HO/LO pulse width mismatch Min -- -- 500 50 -- -25 Typ 40 20 -- -- 200 -- Max Units Test Conditions 60 ns VS = 0V 30 CT = 100pF, -- kHz RT = 10k -- ns -- Pulse on CS 25 VS = 0V ~ 100V Static Electrical Characteristics VCC = VBS = 12V, CLOAD = 1000pF, and TA = 25C unless otherwise specified. Symbol VOH VOL IIeak IQBS IQCC VCS+ VCSVCCUV+ VCCUVVBSUV+ VBSUVIO+ IODefinition High level output voltage, VCC or VBS - VO Low level output voltage Offset supply leakage current Quiescent VBS supply current Quiescent VCC supply current Overcurrent shutdown threshold Overcurrent shutdown threshold Undervoltage positive going threshold Undervoltage negative going threshold High side undervoltage positive going threshold High side undervoltage negative going threshold Output high short circuit current Output low short circuit current Min -- -- -- -- -- 250 150 6.8 6.3 6.8 6.3 -- -- Typ -- -- -- -- -- 300 200 7.3 6.8 7.3 6.8 1.0 1.0 Max Units 1.5 0.1 50 150 1.5 350 250 7.8 7.3 7.8 7.3 -- -- A V A mA mV mV Test Conditions V www.irf.com (c) 2008 International Rectifier 6 AUIR2085S Functional Block Diagram AUIR2085S COM www.irf.com (c) 2008 International Rectifier 7 AUIR2085S www.irf.com (c) 2008 International Rectifier 8 AUIR2085S Input/Output Pin Equivalent Circuit Diagrams VCC ESD Diode CS RESD ESD Diode ESD Diode ESD Diode COM www.irf.com (c) 2008 International Rectifier 9 AUIR2085S Lead Definitions PIN 1 2 3 4 5 6 7 8 Symbol CS OSC COM LO VCC VS HO VB Current sense input Oscillator pin Logic supply return Low side output Logic supply Floating supply return High side output High side floating supply Description Lead Assignments www.irf.com (c) 2008 International Rectifier 10 AUIR2085S Pin Descriptions Cs: The input pin to the overcurrent comparator. Exceeding the overcurrent threshold value specified in "Static Electrical Parameters" Section will terminate output pulses and start a new soft start cycle as soon as the voltage on the pin reduce below the threshold value. OSC: The oscillator-programming pin. Only two components are required to program the internal oscillator frequency: a resistor connected between the VCC pin and the OSC pin, and a capacitor connected from the OSC to COM. The approximate oscillator frequency is determined by the following simple formula: fOSC = 1 / (2 * RT * CT) Where frequency is in Hertz (Hz), RT resistance in Ohms () and CT capacitance in Farads (F). The recommended range of timing resistors is between 10k and 100k and range of time capacitances is between 47pF and 470pF. The timing resistors less than 10k should be avoided. The value of the timing capacitor determines the amount of dead time between the two output drivers: lower the CT, shorter the dead time and vice versa. It is not recommended to use a timing capacitor below 47pF, for best performance keep the timing components physically as close as possible to the AUIR2085S. Separated ground and VCC traces to the timing components are encouraged. COM: Signal ground and power ground for all functions. Due to high current and high frequency operation, a low impedance circuit board ground plane is highly recommended. HO, LO: High side and low side gate drive pins. The high and low side drivers can directly drive the gate of a power MOSFET. The drivers are capable of 1A peak source and sink currents. It is recommended that the high and low drive pins be very close to the gates of the high side and low side MOSFETs to prevent any delay and distortion of the drive signals. VB: The high side power input connection. The high side supply is derived from a bootstrap circuit using a low-leakage Schottky diode and a ceramic capacitor. To prevent noise, the Schottky diode and bypass capacitor should be very close to the AUIR2085S. VS: The high side power return connection. VS should be connected directly to the source terminal of high side MOSFET with a trace as short as possible. VCC: The IC bias input connection for the device. Although the quiescent VCC current is very low, total supply current will be higher, depending on the gate charge of the MOSFETs connected to the HO and LO pins, and the programmed oscillator frequency, total VCC current is the sum of quiescent VCC current and the average current at HO and LO. Knowing the operating frequency and the MOSFET gate charge (Qg) at selected VCC voltage, the average current can be calculated from: Iave = 2 x Qg X fOSC To prevent noise problem, a bypass ceramic capacitor connected to VCC and COM should be placed as close as possible to the AUIR2085S. AUIR2085S has an under voltage lookout feature for the IC bias supply, VCC. The minimum voltage required on VCC to make sure that IC will work within specifications must be higher than 8.5V (10V minimum VCC is recommended to prevent asymmetrical gates signal on HO and LO pins that are expected when VCC is between 7.5V and 8.5V). www.irf.com (c) 2008 International Rectifier 11 AUIR2085S Package Details: www.irf.com (c) 2008 International Rectifier 12 AUIR2085S Tape and Reel Details: LOADED TAPE FEED DIRECTION B A H D F C NOTE : CONTROLLING DIMENSION IN MM E G CARRIER TAPE DIMENSION FOR 8SOICN Metric Imperial Code Min Max Min Max A 7.90 8.10 0.311 0.318 B 3.90 4.10 0.153 0.161 C 11.70 12.30 0.46 0.484 D 5.45 5.55 0.214 0.218 E 6.30 6.50 0.248 0.255 F 5.10 5.30 0.200 0.208 G 1.50 n/a 0.059 n/a H 1.50 1.60 0.059 0.062 F D C E B A G H REEL DIMENSIONS FOR 8SOICN Metric Code Min Max A 329.60 330.25 B 20.95 21.45 C 12.80 13.20 D 1.95 2.45 E 98.00 102.00 F n/a 18.40 G 14.50 17.10 H 12.40 14.40 Imperial Min Max 12.976 13.001 0.824 0.844 0.503 0.519 0.767 0.096 3.858 4.015 n/a 0.724 0.570 0.673 0.488 0.566 www.irf.com (c) 2008 International Rectifier 13 AUIR2085S Part Marking Information www.irf.com (c) 2008 International Rectifier 14 AUIR2085S Ordering Information Standard Pack Base Part Number Package Type Form AUIR2085S SOIC8 Tube/Bulk Tape and Reel Quantity 95 2500 AUIR2085S AUIR2085STR Complete Part Number The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This document supersedes and replaces all information previously supplied. For technical support, please contact IR's Technical Assistance Center http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Revision History www.irf.com (c) 2008 International Rectifier 15 |
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