Isolated Drive Transmitter

The UC1726 Isolated Drive Transmitter, and its companion chip, the UC1727 Isolated High Side IGBT Driver, provide a unique solution to driv- ing isolated power IGBTs They are particularly suited to drive the high side devices on a high voltage H-bridge. The UC1726 device transmits the drive Logic and drive power, along with transferring and receiving fault information with the isolated Gate circuit using a low cost pulse trans- former. This drive system utilizes a duty cycle modulation technique that gives in- stantaneous response to the drive control transitions, and reliably passes steady state, or DC conditions. High frequency operation, up to 750kHz, allows the cost and size of the coupling transformer to be minimized. The UC1726 CAN be powered from a single VCC supply which internally generates a Voltage Reference for the Logic circuitry. It CAN also be placed into a low power shutdown mode that disables the internal reference. The ICs Logic circuitry CAN be powered from an external supply, VL, to mini- mize overall power dissipation. Fault Logic monitors the Isolated High Side IGBT Driver UC1727 for faults. Based on user defined Timing the UC1726 distinguishes valid faults, which it responds to by setting the fault latch pin. This also disables the Gate drive information until the fault reset pin is toggled to a Logic one. The UC1726 operates over an 8 to 35 volt supply range. The typical VCC voltage will be greater than 28 volts to be compatible with the UC1727. The undervoltage lockout circuitry of the Isolated High Side IGBT Driver UC1727 locks out the drive information during its undervoltage lockout. By Texas Instruments
UC1726 's PackagesUC1726 's pdf datasheet

UC1726 Pinout, Pinouts
UC1726 pinout,Pin out
This is one package pinout of UC1726,If you need more pinouts please download UC1726's pdf datasheet.

UC1726 Application circuits
UC1726 circuits
This is one application circuit of UC1726,If you need more circuits,please download UC1726's pdf datasheet.

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