The TMS320F240 DSP supports 8 PWM channel outputs, made up of 3 complementary pairs (6 outputs) with programmable deadbands and 2 independent outputs generated by-simple compare functions. The DSP240 board uses the 8 PWM channel outputs to generate the 8 gate signals, and converts these outputs to 8 isolated gate driver outputs through HCPL-316J gate driver chips. Two of the gate drive outputs require dead band compensation to be software-calculated. Isolated supplies are generated on-card for each gate drive circuit. Gate fault signals from the eight HCPL-316J's are linked together and connected to the PDPINT* interrupt. This provides a hardware interrupt to the DSP immediately on detection of a fault, which disables the PWM signals within 200 nanoseconds using internal hardware logic within the DSP.
2 Ağustos 2007 Perşembe
Gate Drive Interface
The TMS320F240 DSP supports 8 PWM channel outputs, made up of 3 complementary pairs (6 outputs) with programmable deadbands and 2 independent outputs generated by-simple compare functions. The DSP240 board uses the 8 PWM channel outputs to generate the 8 gate signals, and converts these outputs to 8 isolated gate driver outputs through HCPL-316J gate driver chips. Two of the gate drive outputs require dead band compensation to be software-calculated. Isolated supplies are generated on-card for each gate drive circuit. Gate fault signals from the eight HCPL-316J's are linked together and connected to the PDPINT* interrupt. This provides a hardware interrupt to the DSP immediately on detection of a fault, which disables the PWM signals within 200 nanoseconds using internal hardware logic within the DSP.
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