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BG2B-5015

BG2B-5015

  • 厂商:

    POWEREX(鑫鸿)

  • 封装:

    -

  • 描述:

    Powerex IGBT Modules - Power Management, IGBT Power Module Driver Evaluation Board

  • 数据手册
  • 价格&库存
BG2B-5015 数据手册
Application Second Release: July 10, 2012 NOTES: BG2B – Universal Gate Drive Prototype Board Description: The BG2B is a two channel gate drive circuit for high power IGBT modules. The BG2B utilizes Powerex hybrid gate drivers and DC to DC converters to provide efficient switching of modules rated up to 400A. The hybrid gate drivers include high speed opto-couplers for control signal isolation and desaturation detection to protect the IGBT from short circuit conditions. The hybrid DC to DC converters provide fully isolated control power for each driving channel. The BG2B also provides an isolated fault feedback signal. Features:  1.5A, 3A or 5A Peak Output Current  2500VRMS isolation for control power and signals  Standard AMP MTA .100” input connector  Operates from a single 15 VDC or 24 VDC supply  Wide output voltage swing +15V/-8V  Compact Size 3” x 2.2” (76mm x 56mm) Applications: BG2B is designed for use with Powerex NF and A series IGBT modules.   Use VLA106-15242 DC to DC converter for operation with 15 VDC control power Use VLA106-24242 DC to DC converter for operation with 24 VDC control power Ordering Information: BG2B-1515 is a kit with a bare BG2B board, two M57159L-01 and two VLA106-15242 BG2B-3015 is a kit with a bare BG2B board, two VLA504-01 and two VLA106-15242 BG2B-5015 is a kit with a bare BG2B board, two VLA503-01 and two VLA106-15242 BG2B Application Guide Peak Drive Current (IOP) Minimum RG Typical Application* Part Number M57159L-01 +/- 1.5A 4.2 Ω Up to 100A VLA504-01 +/- 3A 3.0 Ω Up to 200A VLA503-01 +/- 5A 2.0 Ω Up to 400A Gate Driver (IGBT Module Rating) DC/DC Converter VLA106-15242 for 15 VDC input VLA106-24242 for 24 VDC input * Compatible IGBT module depends on voltage rating, switching frequency and selected RG. Refer to Powerex application notes for details. Note: VLA504-01 and VLA503-01 gate drivers replace older types M57959L and M57962L. VLA106-15242 replaces the older M57145L-01 1 Figure 2: VLA106-15242, VLA106-24242 Block Diagram VCE Detector t Adjust 2 trip 1 VCE 4 VCC Control 14 Input 180 Interface Buffer detect + 9 VIN - 3.3K 8 10 11 Rectifier Fault Latch and Timer Fault 8 Oscillator Figure 1: VLA503-01/VLA504-01/M57159L-01 Block Diagram 24V VZ=8.2V 3 VCC 2 VO 1 VEE Voltage Regulator Current Limiter 5 VO 13 Opto Coupler 6 VEE Circuit Explanation: The BG2B is a basic two channel gate driver designed around the recommended application circuits for the Powerex M57159L-01, VLA503-01 and VLA504-01 hybrid IGBT gate drivers in combination with either VLA106-15242 or VLA106-24242 isolated DC to DC converters. A functional block diagram of the VLA503/504-01 and M57159L-01 hybrid gate drivers is shown for reference in Figure 1. These gate drivers are optimized for use with Powerex NF and A series IGBT modules. The drivers use a high speed open collector type opto-coupler to provide 2500VRMS isolation of control signals. The output stage is designed to provide high current gate drive with the appropriate on- and off-state bias voltages for large IGBT modules. The gate driver includes a desaturation detection circuit to provide protection against short circuit conditions. For additional detailed information on the characteristics and operation of these gate drivers please refer to the individual device data sheets. Figure 2 shows a block diagram of the VLA106-15242 and VLA106-24242 hybrid DC to DC converters. These two devices are identical except that VLA106-15242 is designed to operate from a 15 VDC input and the VLA106-24242 is designed to operate from a 24 VDC input. These DC to DC converters use a transformer to provide 2500VRMS isolation for gate drive power. The converter’s regulated 24VDC output is split using a resistor and zener diode to provide +15.8V and -8.2V for the hybrid gate driver. For additional detailed information on the operation of the hybrid gate drivers and DC to DC converters please see the individual device data sheets. A complete schematic and component selection guide for the BG2B is shown in Figure 3. The board will normally be operated with two input voltage sources. A 5V logic source (+V L) provides drive for the high speed opto-couplers inside the hybrid gate drivers and pull-up voltage for the fault signal isolation optos OP1 and OP2. A control power supply (+VS) provides power for the gate driver and is connected to the primary side of the DC to DC converters at pins 8,9 and 10,11. The +VS source is decoupled with the low impedance electrolytic capacitors C4 and C8. These capacitors are connected close to the input pins of each DC to DC converter to provide a stable, well-filtered DC source. A 150uF capacitor was selected for C4 and C8 to provide the required ripple current and filtering assuming a maximum driving load and a significant distance to the main filter capacitor of the +VS supply. These capacitors will be larger than necessary if the driving load is smaller or the VS supply main filter capacitors are nearby. The DC to DC converters provide isolated gate drive power which consists of +15.8V (VCC) at pin 3 and -8.2 (VEE) at pin 1 with respect to common at pin 2. The gate drive power supplies are decoupled using the low impedance electrolytic capacitors C1, C2, C5, and C6. It is very important that these capacitors have low enough impedance and sufficient ripple current capability to provide the required high current gate drive pulses. The 82uF low impedance capacitors used on the BG2B are sized to supply 5A gate pulses at a 10KHz rate. If the application is operating at lower frequency or lower peak current it may be possible to reduce the size of these capacitors. The isolated VEE and VCC supplies provided by the DC to DC converters are connected to the hybrid gate drivers at pins 4 and 6 to provide gate drive power. The hybrid gate driver amplifies the control input signal and produces high current gate drive at pin 5. The gate drive current is adjusted by selecting the appropriate series gate resistance (RG). RG will normally be adjusted to provide suitable drive for the module being used considering dynamic performance, losses and switching noise. For more information on selecting RG see Powerex IGBT module application notes. Protection against gate voltage surges is provided by DZ1, DZ2, DZ4, and DZ5. These zener diodes also help to control short circuit currents by shunting miller current away from the gate. 2 Figure 3: BG2B Schematic and Component Selection VLA106-15242/VLA106-24242 11 8 3 R1 + + C1 C2 5 + OP1 CN1 +VL CN2 DZ3 C4 GND +VS FO IN1 IN2 D1 D2 1 14 13 14 13 DZ1 DZ2 RG1 C3 10 10 J1 1 E1 M57159L-01/VLA503-01/VLA504-01 VLA106-15242/VLA106-24242 11 1 8 3 DZ6 OP2 14 13 14 13 10 10 + E2 G2 R2 + C5 C6 R3 D3 D4 1 C8 + G1 DZ4 DZ5 RG2 C7 J2 11 M57159L-01/VLA503-01/VLA504-01 Component Selection: Designation D1, D2, D3, D4 DZ1, DZ2, DZ4, DZ5 DZ3, DZ6 C1, C2, C5, C6 C4, C8 C3, C7* R1, R2 R3 OP1, OP2 CN1** CN2 Typical Value 0.5 A, 1000V 16V, 1W 30V, 1W 82F, 35V 150uF, 35V 0-200 pF 4.7k, 0.25W 4.7K, 0.25W NEC PS2501 MTA .100” ¼” Ring Lug Description VCE detection diode – ultra fast recovery Gate Voltage Surge Protection Detect input pin surge voltage protection Power supply filter – Electrolytic, low Impedance Control power filter – Electrolytic, low impedance Adj. Trip time – Multilayer ceramic or film* Fault sink current limiting resistor Fault feedback pull-up resistor Opto-coupler for fault signal isolation Input and gate drive connectors Collector voltage sensing connection Example: Mfg./PN ON Semi MUR1100E 1N4745 1N4751 Panasonic EEU-FC1V820 Panasonic EEU-FC1V151 EPCOS B37979--------- NEC PS2501 AMP 640457-6 AMP 34151 * Not required in all applications. Please see hybrid gate driver application notes for details. ** Recommended mating connector AMP CST-100 Housing P/N 770602-6 with crimp contact 770666-2. Short circuit protection is provided by means of desaturation detection. For details on the operation of this circuit consult the hybrid gate driver individual data sheets. The collector voltage of each IGBT is detected through the series connected high voltage blocking diodes D1, D2 and D3, D4. The combined blocking voltage of the series connected diodes must be equal to or greater than the VCES rating of the IGBT. For applications using lower voltage IGBT modules it is possible to use a single detection diode in each channel. DZ3 and DZ6 protect the gate driver’s detect input (Pin 1) from voltage surges during reverse recovery of the high voltage blocking diodes. The capacitors C3 and C7 are used to adjust the drivers protection circuit trip time. The driver’s default settings are sufficient for many applications so it may be possible to omit these capacitors. For details on the use of C3 and C7 consult the individual gate driver data sheets. If the gate driver’s short circuit protection is activated it immediately shuts down the gate drive and pulls pin 8 low to indicate a fault. Current flows from Vcc (pin 3 of DC to DC converter) through the LED in fault isolation opto (OP1, OP2) to pin 8. The transistor in the fault isolation opto turns on and pulls the fault signal line (FO) at pin 4 of CN1 low. This opto isolated signal can now be used by the controller to detect the fault condition. 3 Figure 4: BG2B External Wiring Diagram C1 CN2 RC Filter to remove noise on fault signal RC~10us To logic level control circuits CMOS type buffer must sink 15mA G1 E1 CN1 GND +VS FO IN1 IN2 +VL C2E1 E2 G2 1 E2 IGBT Module Interface Circuit Requirements: A typical interface circuit for the BG2B is shown in Figure 4. A single control power supply (+VS) is connected to pin 5 of CN1 with its common at pin 6. This supply provides all of the gate drive power for both channels via the hybrid DC to DC converters. The current drawn from the +VS supply will vary from less than 100mA to more than 500mA depending on the switching frequency and size of IGBT being driven. Consult the hybrid gate driver application notes for details on determining the required supply current for the gate driver. The gate driver supply current can then be converted into current drawn from the +VS supply using the efficiency specification on the DC to DC converter data sheet. A 5V logic supply is connected at pin 1 of CN1 and shares the same common at pin 6 of CN1 as the 15V control supply. The 5V supply is directly connected to pin 14 of the hybrid gate driver which is internally connected to the anode of the LED in the high speed opto coupler. The 5V supply is also used to pull the output side of the fault isolation opto couplers high. The control signal interface is designed for use with standard 5V CMOS logic. The control input signals at pins 2 and 3 of connector CN1 are used to turn the IGBTs on and off. These signals are active low which means that the gate driver output will be high (IGBT on) when they are pulled low. These control pins are connected directly to pin 13 of the hybrid gate driver which is connected internally through a 180Ω limiting resistor to the cathode of the LED in the high speed opto coupler (see figure 1). When the control signal is pulled low, current flows from the 5V logic supply through the LED to turn the gate driver’s output on. The control pins must be pulled low with a buffer that is capable of sinking at least 16mA in order to turn on the high speed opto coupler inside the hybrid gate driver. A CMOS buffer that actively pulls its output high in the off state (74HC04 or similar) is recommended for maintaining good common mode noise immunity. Open collector drive that allows IN1 and IN2 to float will degrade common mode noise immunity and is therefore not recommended. The fault signal line on pin 4 of CN1 is active low which means that a fault condition will be indicated by a low level signal. During normal operation pin 4 is pulled high to the +VL supply by the 4.7K resistor R3. If either of the hybrid gate drivers detects a short circuit condition its fault isolation opto (OP1, OP2) will turn on and pull pin 4 of CN1 low. When a fault is detected the hybrid gate drivers disable the output and produce a fault signal for a minimum of 1ms. Any signal on the fault line that is significantly shorter than 1ms can not be a legitimate fault so it should be ignored. Therefore, for a robust noise immune design, it is recommended that an RC filter with a time constant of approximately 10μs be added between pin 4 and the controller as shown in figure 4. Printed Circuit Layout: Figure 5 shows the layout of the BG2B two channel gate driver board. The compact 3” x 2.2” circuit board with only 24 components clearly demonstrates the advantage of using hybrid gate drivers and DC to DC converters. One important feature is the use of three ground plane islands for the regions of the PCB having high voltage differences. Two of the islands are tied to the IGBT emitter/circuit common (Pin 2 of the DC to DC converters) of each output channel. The third island is connected to logic interface common at pin 6 of CN1. This layout provides shielding to help prevent undesirable coupling of noise between the control side and the gate drive channels. Additional Information: Detailed information about the operation and electrical characteristics of the M57159L01, VLA503-01 and VLA-504-01 hybrid gate drivers can be found on the individual device data sheets. Electrical 4 characteristics such as input voltage range, efficiency, and output voltage regulation of the VLA106-15242 and VLA106-24242 DC to DC converters can also be found on the individual device data sheets. Information about calculating gate drive current and selection of series gate resistors (RG) can be found in the general IGBT module and gate drive application notes. For applications using higher current IGBT modules refer to the application notes for the VLA500-01 hybrid gate driver and BG2A reference design. For applications using high frequency optimized NFH series IGBT modules refer to the VLA502-01 application note. All of these documents are available on the Powerex website at www.pwrx.com. For design assistance with any of the products covered in this application note contact your local Powerex representative or Powerex application engineering at (724) 925-7272. Figure 5: BG2B Printed Circuit Board Layout Component Side Solder Side 5
BG2B-5015 价格&库存

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