Application Note AN- IRS and IR Comparison By Jason Nguyen, Min Fang, David New Table of Contents Page Introduction... Block Diagrams... Electrical Characteristic Differences... Figures... Summary...9 Introduction The IRS is a new HVIC product that replaces the IR HVICs and is pin-to-pin compatible with its corresponding predecessor. In many cases, little or no change is necessary to use the new products. This application note describes the various differences between the IRS and the IR HVICs. The IRS is a high voltage, high speed power MOSFET and IGBT drivers with independent high and low side referenced output channels. Proprietary HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. The logic input is compatible with standard CMOS or LSTTL output, down to. V logic. The output driver features a high pulse current buffer stage designed for minimum driver crossconduction. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which operates up to V.
Block Diagrams The IRS and IR share the same block diagram. There are no functional changes between corresponding part numbers. Electrical Characteristic Differences All measurement conditions remain unchanged unless noted. Parameters not mentioned in this document have not changed. Absolute imum Ratings There are no changes in the Absolute imum Ratings. Recommended Operating Conditions There are no changes in the Recommended Operating Conditions.
Dynamic Electrical Characteristics Parameter IR IRS Symbol Definition typ max typ max t r Turn-on rise time (Vs = V) t f Turn-off fall time (Vs = V) 8 8 Units ns The IRS has faster rise and fall times when compared to the IR. Static Electrical Characteristics Parameter IR IRS Symbol Definition min typ max min typ max V IH Logic "" input voltage.9 - -. - - V IL Logic "" input voltage - -.8 - -.8 V SD,TH+!SD input positive going threshold.9 - -. - - V SD,TH-!SD input negative going threshold - -.8 - -.8 V OH High level output voltage, - V O -.8. -.. Io = ma Io = ma V OL Low level output voltage, V O -.. -.. Io = ma Io = ma I O+ Output high short circuit pulsed current (V O = V, VIN=Logic "", PW <= us) - 9 - I O- Output low short circuit pulsed current (V O = V, VIN = Logic "", PW <= us) - - Units V ma With the IRS,. The V IH and V SD,TH+ has been reduced to. V for better. V logic compatibility.. The V OH and V OL are tested using a new standardized test condition of I O = ma. The output driver s on resistance is slightly lower for IRS.. The typical values for I O+ and I O- are marginally higher, which allows faster switching. Figures This figures shown in this section compare figures shown in the IR (left column) and IRS (right column) datasheets. Illustrations that have not changed between the two datasheets have not been included in this section.
IR IRS Turn-On Rise Time (ns) Turn-On Rise Time (ns) 7 - - 7 Figure 9A. Turn-On Rise Time vs.temperature 7 - - 7 Figure 9A. Turn-On Rise Time vs.temperature Turn-On Rise Time (ns) Turn-On Rise Time (ns) Figure 9B. Turn-On Rise Time Figure 9B. Turn-On Rise Time Turn-Off Fall Time (ns) Turn-Off Fall Time (ns) - - 7 - - 7 Figure A. Turn-Off Fall Time vs. Temperature Figure A. Turn-Off Fall Time vs. Temperature
Turn-Off Fall Time (ns) Turn-Off Fall Time (ns) Figure B. Turn-Off Fall Time vs. Input voltage Figure B. Turn-Off Fall Time vs. Input voltage - - 7 Figure A. Logic "" Input Voltage vs. Temperature - - 7 Figure A. Logic "" Input Voltage vs. Temperature V BAIS Figure B. Logic "" Input Voltage V BAIS Figure B. Logic "" Input Voltage
SD Input Positive Going threshold (V) - - 7 SD Input Positive Going threshold (V) - - 7 Figure A. SD Input Positive Going Threshold vs. Temperature Figure A. SD Input Positive Going Threshold vs. Temperature SD Input Positive Going threshold (V) SD Input Positive Going threshold (V) V CC V CC Figure B. SD Input Positive Going Threshold vs. Supply Figure B. SD Input Positive Going Threshold vs. Supply High Level Output Voltage (V) High Level Output Voltage (V)..... - - 7 - - 7 Figure A. High Level Output Voltage vs. Temperature (Io = ma) Figure A. High Level Output Voltage vs. Temperature (Io = ma)
High Level Output Voltage (V) High Level Output Voltage (V)....... V BAIS V BAIS Figure B. High Level Output Voltage (Io = ma) Figure B. High Level Output Voltage (Io = ma) Low Level Output Voltage (V)..... - - 7 Figure 7A. Low Level Output Voltage vs.temperature (Io = ma) Low Level Output Voltage (V)..... - - 7 Figure 7A. Low Level Output Voltage vs.temperature (Io = ma) Low Level Output Voltage (V).. Figure 7B. Low Level Output (Io = ma) Low Level Output Voltage (V)..... Figure 7B. Low Level Output (Io = ma) 7
Output Source Current (ma) Output Source Current (ma) - - 7 - - 7 Figure A. Output Source Current vs. Temperature Figure A. Output Source Current vs. Temperature Output Source Current (ma) Output Source Current (ma) Figure B. Output Source Current Figure B. Output Source Current 8 Output Sink Current (ma) Output Sink Current (ma) - - 7 - - 7 Figure A. Output Sink Current vs.temperature Figure A. Output Sink Current vs.temperature 8
9 Output Sink Current (ma) Output Sink Current (ma) 7 Figure B. Output Sink Current Figure B. Output Sink Current Summary As shown by this document, the IRS and the IR are very similar with only a few parametric differences. 9