User Guide for FEBFOD8332 FEBFOD8333 Evaluation Board
Contents
1. Evaluation board or kit is for demonstration purposes only and neither the Board nor this User s Guide constitute a sales contract or create any kind of warranty whether express or implied as to the applications or products involved Fairchild warrantees that its products meet Fairchild s published specifications but does not guarantee that its products work in any specific application Fairchild reserves the right to make changes without notice to any products described herein to improve reliability function or design Either the applicable sales contract signed by Fairchild and Buyer or if no contract exists Fairchild s standard Terms and Conditions on the back of Fairchild invoices govern the terms of sale of the products described herein DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY FUNCTION OR DESIGN FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS NOR THE RIGHTS OF OTHERS LIFE SUPPORT POLICY FAIRCHILD S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which a 2 A critical component is any2. VLen1 Vo1 and Voz Waveform File Control Setup Measure Analyze Utilities Help 3 04 PM 2 00 GSa s 64 0 kpts VLED1 TP4 41 Je era 1 23 7725000 s gt 3 Scales Source Vertical Scale Offset Horizontal Scale Position channel 1 5 00 V div 10 040 V 1 00000 us div 3 7725000 us S BBEEEEAS Xx 1 00 s Figure 10 FOD833x with Totem Pole Current Buffer Vi gpi Vo1 and Vo Waveform During Soft Turn Off 2014 Fairchild Semiconductor Corporation 13 FEBFOD833x Rev 1 0 0 FAIRCHILD 7 Conclusion The FEBFOD833x evaluation board allows the user to quickly evaluate the performance of the Fairchild FOD833x smart gate driver optocoupler Measurement results clearly demonstrate the AC performance and critical protection features of the product that are needed during IGBT fault conditions With proper booster circuit design the gate drive capability can be enhanced without affecting key features such as desaturation detection and soft turn off timings 8 Revision History Description July 2014 Initial Release WARNING AND DISCLAIMER Replace components on the Evaluation Board only with those parts shown on the parts list or Bill of Materials in the Users Guide Contact an authorized Fairchild representative with any questions This board is intended to be used by certified professionals in a lab environment following proper safety procedures Use at your own risk The
3. the totem pole current buffer The jumper configurations are shown in Table 1 on the next page 4 If soft turn off evaluation is required J11 must be left open with no shorting jumper installed This allows the DESAT pin to be charged above DESAT threshold voltage 5 Scope shots of the signals are shown in the subsequent section using the board in standalone set up and with the totem pole current buffer 6 Additional evaluation is accomplished by changing the jumper configuration For example the board can be configured to positive gate drive Vo 0 V only requiring one power supply source at each side of the isolation barrier The DESAT threshold voltage seen at TP7 and the blanking time can also be varied using jumper J8 and by soldering additional capacitor on the C6 pads 7 The test points and their corresponding signals are listed in Table 2 2014 Fairchild Semiconductor Corporation 10 FEBFOD833x Rev 1 0 0 FAIRCHILD EN C NN ble1 EVB Jumper Configurations Vo Swing 5 V to 15 V FOD833x Standalone Vo Swing 5 V to 15 V FOD833x and Totem Pole Vo swing 5 V to 15 V X X X X Xx FOD833x and Totem Pole for Soft Turn off Evaluation Vo swing 5 V to 15 V X X FOD833x Standalone for Soft Turn off Evaluation Note 1 X Jumper short blank jumper open Table 2 Test Points TP2 Vcc Positive Supply Voltage 3 V to 15 V for Fault Sense Optocoupler 2014 Fairchild Semicond
4. FAIRCHILD User Guide for FEBFOD8332 FEBFOD8333 Evaluation Board Input LED Drive 2 5 A Output Current IGBT Drive Optocoupler with Desaturation Detection Isolated Fault Sensing and Active Miller Clamp Featured Fairchild Products FOD8332 FOD8333 Direct questions or comments about this evaluation board to Worldwide Direct Support Fairchild Semiconductor com 2014 Fairchild Semiconductor Corporation FEBFODS33x Rev 1 0 0 FAIRCHILD Table of Contents l Sa SE dA dies S e 3 l l Peatures and Benefits uoc PR rnit e duree uua EAE RE ETEA 4 1 2 Applications CREER aaen iannis D Operations ecce neenon ETE eee ener eere rete nennen s eene iranan 6 Circuit Schematic MMMM asec ccc ae na eseeesscececstecassseescesecssecessseeseceeeanees 8 Setup and Operation EM oa seen eneeedsnceesstensssssnsaceeccceneassensncecssnes 10 Test Procedu and Conditions ESPERE eene 10 Scope Soi PEDE EBD IA 12 Cong iis OnE oo ERO eese EDD 14 REVISION DISTO BEN A ooo oo RRP o occ oooi ooo oouo oo ee 14 2014 Fairchild Semiconductor Corporation 2 FEBFOD833x Rev 1 0 0 FAIRCHILD This user guide supports the evaluation kit for the FOD8332 and FOD8333 It should be used in conjunction with the FOD8332 and FOD8333 datasheets as well as Fairch
5. V CLAMP 10 ry Vm 5 Vien 9 JE J o HVDC Figure 3 Typical Application Circuit The internal gate driving circuitry of FOD833x can be used with either a single positive power supply Vpp or a dual positive and negative supply Vpp and Vss The output driver stage Vo is made up of a pair of PMOS and NMOS transistors which facilitates close to rail to rail output swing This allows a tight control of gate voltage during on state and short circuit condition Due to the low Rps ow of the MOSFETs the power dissipation is reduced as compared to bipolar type driver output stages The absolute maximum rating of the output peak current IopgAk is 3 A FOD833x provides short circuit protection by means of desaturation detection circuits that monitor the collector emitter voltage of the IGBT When the DESAT voltage increases above the threshold voltage a short circuit condition 1s detected and the driver output stage executes a soft IGBT turn off and is eventually driven low The soft turn off feature ensures the safe turn off of the IGBT under fault conditions This reduces the voltage spike on the collector of the IGBT Without this the IGBT would see a heavy spike on the collector resulting in a permanent damage to the device when it is turned off immediately The FAULT open drain output is triggered active LOW to report a desaturation error to the micro controller The FAULT signal is reset when Vigp 1s pulled from LOW to HIGH
6. component of a life support device or are intended for surgical implant into the body or b support or system whose failure to perform can be reasonably expected to sustain life or c whose failure to perform when properly used in cause the failure of the life support device or system or to affect its accordance with instructions for use provided in the labeling can be safety or effectiveness reasonably expected to result in significant injury to the user ANTI COUNTERFEITING POLICY Fairchild Semiconductor Corporation s Anti Counterfeiting Policy Fairchild s Anti Counterfeiting Policy is also stated on our external website www fairchildsemi com under Sales Support Counterfeiting of semiconductor parts is a growing problem in the industry All manufacturers of semiconductor products are experiencing counterfeiting of their parts Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation substandard performance failed applications and increased cost of production and manufacturing delays Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above Products customers buy either from Fairchild directly or from Authorized Fairchild Distribut
7. driver driving a 10 nF capacitor load or FOD833x with the totem pole current buffer driving a 51 nF capacitor load 2014 Fairchild Semiconductor Corporation 9 FEBFOD833x Rev 1 0 0 FAIRCHILD 4 Setup and Operation The setup requires three power supply sources Vcc on one side of the isolation barrier Vpp positive supply and Vss negative supply on the other side of the isolation barrier The input signal is applied at the Vj gp and the resulting output is used to drive either a 10 nF capacitor load Cg or a totem pole current buffer which in turn drives a bigger 5 nF capacitor load C9 Test points located at selected positions as indicated in the schematics allow the user to probe out the signals and measure the switching characteristics of the device 5 Test Procedures and Conditions This section describes the default setup of the FEBFOD833x evaluation board Please refer to the schematic in Figure 6 1 Connect the power supplies across the following connector A Across Vcc and GND Set the voltage to 5 V A Across Vpp and Vg GND of the power supply Set the voltage to 15 V Across Vg and Vss GND of the power supply Set the voltage to 5 V This power supply configuration enables Vo to swing from 5 V to 15 V 2 Apply the following signal at Vy gp 10 kHz square wave 50 duty cycle amplitude 5 V 3 Evaluation can be completed with the FOD833x as a standalone gate driver or together with
8. ent Driving Capability for Most Medium Power IGBTs High Noise Immunity Characterized by CMR 35 kV us at Vem 1500 Va 1414 Vy Working Insulation Voltage and 8000 V a Transient Isolation Voltage Rating Output Voltage Swing Rail to Rail Low Power Dissipation Soft IGBT Turn Off High Speed 250 ns Propagation Delay 2 33V 5V CMOS TTL Compatible Inputs 2014 Fairchild Semiconductor Corporation 4 FEBFOD833x Rev 1 0 0 FAIRCHILD 1 2 Applications Motor Drives Industrial Inverters Solar Power Inverters Uninterruptible Power Supplies UPS Induction Heating Isolated IGBT Drive Pee ses e see eee eee eee GND ot r n 186 v EL lite 15 Vcc 2 5 I5 0 V cnp le ccc EE FAULT 9 re 14 6 DESAT GND o 4 4 c V Ep4 i Ves d VLED1 m 41 Vo VLED1 Wo VcLAMP MILLER 1 CLAMP VLED1 3 O Ves Figure 2 FOD8332 and FOD8333 Block Diagram 2014 Fairchild Semiconductor Corporation 5 FEBFOD833x Rev 1 0 0 FAIRCHILD 2 5 e O o 3 o hs 4 Operations The application circuit and the timing diagram illustrate the functional use of the FOD833x between a micro controller and a three phase system as well as the interaction of the internal and external signals FOD8332 1 GND1 Ve 16 J poi d Voc 0 1HF CBLANK Rf DDESAT FAULT s i o HVDC CFF 1002 GNO VDD 0 1uF Q11 Vcr RLED VLED Re qi AT d VLED EE EH 3 Phase AC JUL E 7
9. for FOD8332 or automatically after tpesarmure for FOD8333 The DESAT fault detector should be disabled for a short period blanking time before the IGBT turns on to allow the collector voltage to fall below the DESAT threshold This blanking period protects against false trigger of the DESAT while the IGBT is turning on 2014 Fairchild Semiconductor Corporation 6 FEBFOD833x Rev 1 0 0 FAIRCHILD Normal Fault Condition Reset Operation IF Blanking Time VDESAT 1 _ Vo FAULT Figure 4 FOD8332 Timing Diagram Normal Fault Condition Automatic Operation Reset o Blanking Time VDESAT o J bL l NY FAULT Figure 5 FOD8333 Timing Diagram The FOD833x is also designed with an under voltage detection circuit to prevent the application of insufficient gate voltage to the IGBT This could be dangerous as it would drive the IGBT out of saturation and into the linear operation where the losses are very high and the device is quickly overheated 2014 Fairchild Semiconductor Corporation 7 FEBFOD833x Rev 1 0 0 FAIRCHILD 3 Circuit Schematic The FEBFOD833x evaluation board with a booster circuit is designed for the evaluation of FOD833x timing sequence and AC test performance when driving an IGBT power module It is recommended to be used in conjunction with the datasheet The FOD833x is designed to perform as a stand alone optically coupled gate driver in most applications If larger gate drive capab
10. ild s application notes and technical support team Please visit Fairchild S website at www fairchildsemi com 1 Overview Fairchild FOD833x smart gate driver optocoupler an advanced 2 5 A output current IGBT drive optocoupler offers the critical protection necessary for preventing fault conditions that lead to destructive thermal runaway of IGBTs Pin for pin compatible with current solutions the FOD833x consists of an integrated gate drive optocoupler featuring low Rpswony CMOS transistors to drive the IGBT from rail to rail and high speed isolated feedback circuitry for fault sensing It is ideally suited for driving fast switching power IGBTs and MOSFETs FOD833x herein refers to FOD8332 or FOD8333 The key difference between these two products is the reset mechanism The FAULT signal is reset when V gp is pulled from LOW to HIGH for FOD8332 or automatically after tpesarmut for FOD8333 The FOD833x offers best in class noise immunity resulting from its proprietary Optoplanar coplanar packaging technology The optoplanar technology ensures safe insulation thickness of more than 0 4mm in attaining reliable high voltage isolation certified by UL1577 and DIN EN TEC60747 5 5 standards Figure 1 3 Dimensional Illustration of the Internal Die Set of Fairchild s Optoplanar Package Construction 2014 Fairchild Semiconductor Corporation 3 FEBFOD833x Rev 1 0 0 FAIRCHILD 1 1 Features and Benefits 2 5 A Output Curr
11. ility is needed for large IGBT modules or parallel operation an output booster stage may be added to driver for optimum performance One possible implementation is by a discrete NPN PNP totem pole configuration These booster transistors should be fast switching and have sufficient current gain to deliver the desired peak output current P Lo iC C Cdesat 2 0 1uF 100pF R3 100 R2 NC TP m TP2 saa Vec U1 CS FOD8332 0 tuF Vec L1 C1 C RF C2 m C7 C8 2 4 TuF 10K GND VE 47uF 1206 4 7uF 1206 Vdd GND 20v 0 1uF Vec VLED2 f a Vo 1 CF H Fat vesar NC m IL T3 lt e I 4 GND von r V lt 1a Rg VLED1 Vss 204206 Vo1 a 180 7 VLED 1 Vo t mE ives VLED Rg1 4 771206 TD4 1 VLED1 1 VL l CLED VLED1 ss O OQO E o Rg2 4 7 1206 VLED 1 1 a MJD44H11 VLEDI Lj DU R1 180 E Rg3 PS lt gt MEDI E J7 121206 O O tO O Sa Cg Ros 4 7 1206 MJD45H11 T Rg5 4 7 1206 Figure 6 Circuit Schematic 2014 Fairchild Semiconductor Corporation 8 FEBFOD833x Rev 1 0 0 FAIRCHILD Figure 6 Photograph of the Board This board consists of a FOD833x component a non inverting bipolar NPN PNP totem pole current buffer two capacitor loads 10nF 51 nF as well as connectors and test terminals for power supplies and input signals The FOD833x can be evaluated as a stand alone gate
12. ors are genuine parts have full traceability meet Fairchild s quality standards for handling and storage and provide access to Fairchild s full range of up to date technical and product information Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors EXPORT COMPLIANCE STATEMENT These commodities technology or software were exported from the United States in accordance with the Export Administration Regulations for the ultimate destination listed on the commercial invoice Diversion contrary to U S law is prohibited U S origin products and products made with U S origin technology are subject to U S Re export laws In the event of re export the user will be responsible to ensure the appropriate U S export regulations are followed 2014 Fairchild Semiconductor Corporation 14 FEBFOD833x Rev 1 0 0
13. uctor Corporation 11 FEBFOD833x Rev 1 0 0 FAIRCHILD 6 Scope Shots File Control Setup Measure Analyze Utilities Help 2 31 PM 2 00 GSa s 400 kpts On E v Mab T AN MHMMMMMMAMNM ED1 TPA 41 Vol TP9 42 i Q fa m lle eir xl Scales Source Vertical Scale Offset Horizontal Scale Position channel 1 5 00 V div 10 040 V 20 0000 us div 5 7720000 us channel 2 5 00 V div 10 020 V 20 0000 wus div 5 7720000 us 1 of 2 Figure 7 FOD833x without Totem Pole Current Buffer Vi gp and Vo1 Waveform File Control Setup Measure Analyze Utilities Help 2 39 PM 2 00 GSa s 64 0 kpts T VLED1 TP4 ba Vol TP9 42 Source Vertical Scale Offset Horizontal Scale Position channel 1 5 00 V div 10 040 V 1 00000 us div 3 7725000 us channel 2 5 00 V div 19 020 V 1 00000 us div 3 7725000 us Figure 8 FOD833x without Totem Pole Current Buffer Vi gpi and Vo Waveform During Soft Turn Off 2014 Fairchild Semiconductor Corporation 12 FEBFOD833x Rev 1 0 0 FAIRCHILD File Control Setup Measure Analyze Utilities Help 3 07 PM 2 00 GSa s 400 kpts On can vi Vv JANI VY T ALED 1 TP4 1 f 3H le e w 20 0 us 3 7725000 us 0 bd Scales Source Vertical Scale Offset Horizontal Scale Position channel 1 5 00 V div 10 040 V 20 0000 us div 3 7725000 us Figure 9 FOD833x with Totem Pole Current Buffer
Download Pdf Manuals
Related Search