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USER GUIDE

UG499: Si828x-AW-GDB Gate Driver Boards

Skyworks Solutions, Inc. • Phone [949] 231-3000 • [email protected] • www.skyworksinc.com

206359B • Skyworks Proprietary Information • Products and Product Information are Subject to Change without Notice

10

November 10, 2022

Figure 5. Over-Current Trip Level

Figure 6. DESAT Behavior

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Содержание UG499

Страница 1: ...30 A peak output current with integrated boost circuit Independent control of turn on turn off timing through gate resistor selection Isolated power supplies 5 kVRMS safety rated isolation 125 kV µs common mode transient immunity CMTI Reverse polarity protection for 12 V input supply Differential inputs for increased noise immunity DESAT detection and soft shutdown for short circuit protection Gat...

Страница 2: ... circuit allows the switch to be shut down in a controlled manner if desaturation is detected The circuit includes an enhanced Miller Clamp feature to ensure switch turn off is maintained in the presence of high slew rate drain collector or source emitter signals Desaturation faults are indi cated via the FLT pin Operation is restored by toggling the RST pin via the Reset signal on the JT3 I O hea...

Страница 3: ...3 This connector is located in the center of the Si828x AW GDB In the XM3 Evaluation Tool test setup the JT3 connector pro vides the I O interface connections across the Differential Transceiver Daughter Board Companion Tool to the lab bench instrumentations including power supply function generator control signals etc In the XM3 Inverter Reference Design the JT3 connector provides direction conne...

Страница 4: ...l be pulled down through a soft shutdown resistor RSS The drain source limit can be config ured through on board resistors The over current fault is latched upon detection and must be cleared by the user with a high pulse of at least 500 ns on the RESET signal RTD NTC RTD output is a differential signal that returns the resistance of the temperature sensor NTC integrated into XM3 modules The signa...

Страница 5: ...at the bottom of the Si828x AW GDB and provide direct connections to the Wolfspeed XM3 SiC half bridge modules Table 2 provides a listing and locations of the signals on the module connectors HS Gate The high side gate pin is driven by the Si8281 Isolated Gate Driver IC and external BOM circuitry meant to enhance the drive soft shutdown and Miller clamp functions for higher gate capacitance switch...

Страница 6: ... Yes L L L Z9 Notes 1 H High L Low X Irrelevant Z High Impedance 2 PWM EN is active high and has a pull up resistor on the input 3 Reset_Input is active high and has a pull down resistor on the input 4 PS DIS is active low and has a pull up resistor on the input 5 An Overcurrent condition is induced when both PWM inputs are high This condition must be disallowed by external overlap protection 6 A ...

Страница 7: ...c Phone 949 231 3000 sales skyworksinc com www skyworksinc com 206359B Skyworks Proprietary Information Products and Product Information are Subject to Change without Notice 7 November 10 2022 5 Gate Driver Connections Figure 3 Si828x Gate Driver Board Top Side Silkscreen ...

Страница 8: ...frequency that varies inversely with the resistance The resis tance to frequency relationship is displayed in the Table 4 below The resistance to frequency circuits is located on the high voltage side to provide direct connection to the XM3 thermistor sensor Then a digital isolator is used to transmit the fre quency encoded signal back to the primary side and its differential signals are connected...

Страница 9: ...de separate isolated power supplies for both the high side and low side driver The default configuration pro vides a driver power supply that is regulated to 19 V Since the source pin of each channel is biased about 3 6 V above the converter s reference the gate will see a voltage swing from 15 V to 4 V when measured with respect to the source pin The DC DC converter may be operated with a differe...

Страница 10: ...olutions Inc Phone 949 231 3000 sales skyworksinc com www skyworksinc com 206359B Skyworks Proprietary Information Products and Product Information are Subject to Change without Notice 10 November 10 2022 Figure 5 Over Current Trip Level Figure 6 DESAT Behavior ...

Страница 11: ...ediately when the high side gate is taken high If bench testing of the gate driver is required without the XM3 module one may short the HS Drain connection to the high side source to prevent the overcurrent fault from tripping The low side exhibits the same behavior and one may short the high side source low side drain to the low side source for bench testing The Reset signal must be activated to ...

Страница 12: ...utions Inc Phone 949 231 3000 sales skyworksinc com www skyworksinc com 206359B Skyworks Proprietary Information Products and Product Information are Subject to Change without Notice 12 November 10 2022 8 Dimensions Figure 7 Si828x Gate Driver Board GDB Dimensions ...

Страница 13: ...TENESS OF THE INFORMATION TEXT GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES INCLUDING BUT NOT LIMITED TO ANY SPECIAL INDIRECT INCIDENTAL STATUTORY OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT LIM ITATION LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN...

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