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EVDD408, EVDD409, EVDI409, EVDN409 And EVDD414
General Description IXDD408, IXDD409, IXDI409, IXDN409 And IXDD414 Gate Driver IC Evaluation Boards
There are three test points on the board: Control, Gate and Drain. These allow the user to easily attach an oscilloscope probe and the associated ground to the circuit to verify performance.
The EVDD408/EVDD409/EVDI409/EVDN409/EVDD414 evaluation boards are general-purpose circuit boards designed to simplify the evaluation of the IXYS IXDD408, IXDD409, IXDI409, IXDN409 and IXDD414 gate drive ICs, as well as to provide a building block for power circuit development. Any of the four gate driver package types (SO8, Dip 8, 5pin TO-220 and the 5pin TO-263) may be installed in the driver (the 5-Pin TO-263 is factory installed). The board enables the user to drive MOSFETs or IGBTs in the TO-220, TO-247, TO-264 or SOT-227 packages. The evaluation board design allows these MOSFETS to be attached to a heat sink, and in so doing the board assembly can be used as a ground referenced, low side power switch for both single-ended and push-pull configurations. The board layout for the gate driver in the TO-220 and the TO-263 packages (designator U1B), allows the ground tab to be soldered to the ground plane for cooling in high-power, high frequency applications with large MOSFET devices. Circuitry for the TriState function is also included on the evaluation board. Figure 1 is a photograph of the Evaluation Board loaded with an IXDD408YI TO-263 driver and a SOT-227 MOSFET. The low level inputs are shown on the left side of the board. Control is a TTL high true input which controls the on or off state of the power switch Q1, Q2, or Q3. Enable is a low true input, which controls the Tri-State output (IXDD408, IXDD409 and IXDD414 devices only). VCC-IN is the low voltage, (825V) power input, (see Figure 3 below). Figure 2 illustrates the MOSFET mounting of a TO-220, TO-247, or TO-264 device. The MOSFET is mounted on the back side of the PCB. A large through hole is provided so that the device can be attached to a heat sink. The SOT-227 (shown in the photograph) is mounted in a similar manner. Circuit Operation The schematic diagram for the evaluation board is shown in Figure 4. The control gate is applied to R6 then on the input pin 2 of the IC. This signal input is followed in time by the output pins 7 and 6. Pins 1 and 8 are attached to +VCC via a de-coupling network comprised of R1, C1 and R2, C2. Pins 4 and 5 are attached to the circuit ground plane. This is the preferred arrangement of the bypassing for the Vcc input power. The enable pin 3 is attached to the drain of Q4. This device is used to level translate and provide an invert function for the Tri-State mode when used with the IXDD408, IXDD409 and IXDD414 devices. (The IXDI409 and IXDN409 devices do not utilize the enable input.) The drain of Q4 is also attached to the gate of the MOSFET thru RA and DA. In the Tri-State mode the turn-off time of the power MOSFET is determined by the time constant of the input gate capacitance Ciss and the value of the resistor RA. See the IXDD408 and IXDD414 data sheets for additional information on this mode of operation. The U1 output is available at pins 7 and 6. These are attached to the MOSFET via the two one-Ohm resistors R4 and R5. The values of these resistors may be changed to optimize the performance of the specific device being driven.
Figure 1 - EVDD408/EVDD409/EVDI409/EVDN409/EVDD414 Evaluation Board SOT-227 Device Installed For Illustration Purposes Only
Evaluation PCB TO-220, TO-247, TO-264, or SOT-227
Heat Sink
Kapton Insulator
Figure 2 - Evaluation Board Side View Showing Power Device Installed In A High-Power Configuration
INPUT CONTROL GND1 ENABLE * GND2 VCC-IN GND 3
FUNCTION Control Input - 3V into 1K Ohms Ground 1 LOW = True, HIGH = Tri-State Mode Ground 2 VCC input - 8V to 25V Ground 3
* Enable function applies to IXDD408, IXDD409 and IXDD414 devices only
Figure 3 - Input Pin-Out Table
The Evaluation Boards are supplied with either IXDD408YI, IXDD409YI, IXDI409YI, IXDN409YI or IXDD414YI 5-Pin TO263 devices installed, depending upon the evaluation baord part number ordered. To use the evaluation board with a different package type, the installed device must be removed, and the new device installed in the appropriate location.
Ordering Information
Part Number EVDD408 EVDD409 EVDI409 EVDN409 EVDD414 Installed Device IXDD408YI 5-Pin TO-263, 8A With Enable IXDD409YI 5-Pin TO-263, 9A With Enable IXDI409YI 5-Pin TO-263, 9A Inverting IXDN409YI 5-Pin TO-263, 9A Non-Inverting IXDD414YI 5-Pin TO-263, 14A With Enable
Copyright (c) IXYS CORPORATION 2001, 2002
First Release
EVDD408/EVDD409/EVDI409/EVDN409/EVDD414
Figure 4 - EVDD408/EVDD409/EVDI409/EVDN409/EVDD414 Schematic Diagram
NOTES: 1) The schematic shows all three output switches, however only one device can be installed at any one time. 2) The pin-out for device U1 reflects the 8-pin package types (PI and SI). See the IXDD408, IXDD/I/N409 and IXDD414 data sheet for the pin-out of the TO-220 and TO-263 (YI and CI) packages.
Figure 5 - IXDD408 14ns Gate Rise Time, CL=2500pF
Figure 6 - IXDD408 28ns Gate Rise Time, CL=10000pF
Figure 7 - IXDD408 Typical Waveform F=500KHz, CL=10000pF
Figure 8 - IXDD414 11ns Gate Rise Time CL=2500pF
Figure 9 - IXDD414 18ns Gate Rise Time CL=10000pF, R4 & R5=0
Figure 10 - IXDD414 Typical Waveform F=500KHz, CL=10000pF
NOTE:
The capacitive loads used to generate the waveforms above are fixed value ceramic components. All measurements are made at the GATE test point.
IXYS Semiconductor GmbH Edisonstrasse15 ; D-68623; Lampertheim Tel: +49-6206-503-0; Fax: +49-6206-503627 e-mail: marcom@ixys.de Directed Energy, Inc. An IXYS Company 2401 Research Blvd. Ste. 108 Ft. Collins, CO 80526 Tel: 970-493-1901; Fax: 970-493-1903 e-mail: deiinfo@directedenergy.com www.directedenergy.com Doc #9200-0231 Rev 2
IXYS Corporation 3540 Bassett St; Santa Clara, CA 95054 Tel: 408-982-0700; Fax: 408-496-0670 e-mail: sales@ixys.net www.ixys.com
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