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EVALSTGAP2S: isolated 4 A single gate driver demonstration board Introduction The EVALSTGAP2S board allows evaluating all the STGAP2S features while driving a half-bridge power stage with voltage rating up to 1700 V in TO-220 or TO-247 package. The board allows to easily select and modify the values of relevant external components in order to facilitate driver’s performance evaluation under different applicative conditions and fine pre-tuning of the final application’s components.
UM2754 Board description and configuration Board description and configuration The board allows tuning several design parameters, giving the possibility to evaluate and optimize the performance and switching characteristics of the power stage. The user can select and mount the power switch of choice either in TO-220 or TO-247 package; the board also allows installing an optional heatsink.
UM2754 Logic supply voltage (VDD) Logic supply voltage (VDD) It is possible to provide the gate driver control logic supply VDD in three alternative ways to match driver input threshold with the controlling signals voltage swing: • Using the onboard 3.3 V Zener D2 regulator to supply VDD. The Zener is supplied from DC-DC input voltage VAUX.
UM2754 Gate driver supply voltage (VH) Gate driver supply voltage (VH) It is possible to provide the gate driver supply voltage VH in several alternative ways: • Using isolated DC-DC converters in the standard SIP7 package (U5, U6). • Using the bootstrap diode D3 by supplying the low-side driver via J1 and mounting the resistor R3 (initial suggested value 10 Ω).
UM2754 Drivers logic input signals Drivers logic input signals Drivers logic input signals can be applied through the dedicated pins of J9 or J10 connector (refer to Table 1 details). It is possible to reduce the required driving signals exploiting the onboard jumpers according to Table Table 6.
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