AN603 Vishay Semiconductors, AN603 Datasheet
AN603
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AN603 Summary of contents
Page 1
... All control inputs are pulled outputs are open drain. Truth Tables have been provided for each mode of operation. Bootstrap Reg. CAP CAP A B High-Side U.V. Lockout Bootstrap Reg. Input Logic One Shot One Shot DD AN603 Vishay Siliconix . The FAULT DD 23 CAP A Charge Pump CAP ...
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... AN603 Vishay Siliconix Full H-Bridge Operation When operating as a full H-bridge, the control inputs become DIR, QS, PWM, BRK, and EN. When connecting the bridge for anti-phase operation, the DIR input is driven by the control system PWM signal. When connected for sign-magnitude operation, the DIR input controls direction, and the system PWM signal drives the PWM input ...
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... This result is particularly useful when a maximum acceleration rate is required at power on. Figure 3 shows typical current waveforms for both durations of the off period. One Shot 100 mV FIGURE 2. Current Limit Circuitry FIGURE 3. Current Waveforms AN603 Vishay Siliconix Current From 3-Phase MOSFET Bridge R SENSE 10 s www.vishay.com FaxBack 408-970-5600 ...
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... AN603 Vishay Siliconix Cross Conduction Protection When driven as an anti-phase H-bridge or in the independent half-bridge mode, the high-side and low-side MOSFETs of each active phase are toggled. To prevent shoot-through, each half-bridge has break-before-make circuitry. This delays the MOSFET turn-on for approximately 250 ns from the turn-off of the opposite MOSFET ...
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... MOSFETs rely on the PC board to serve as a heat sink. Wide traces should be connected to the Drain pins of the power MOSFETs to draw heat away from their packages and transfer the heat into the PC board. These traces should be at least 0.1” wide. Top Copper FIGURE 5. AN603 Vishay Siliconix LITTLE FOOT ...
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... AN603 Vishay Siliconix By separating the controller and the power MOSFETs, the Si9978DW yields a good balance between circuit integration, compact H-bridge size and flexibility in application. The controller functions are highly integrated, leaving only a few www.vishay.com FaxBack 408-970-5600 6 external passive components. The integration makes it easy ...