LYD105A Driver and Protection Power Supplies

LYD105A mainly integrates the functions of drive, protection and system control, specifically including the following features:
(1) Three-phase IGBT inverter bridge with gate drive circuit and protection circuit.
(2) The upper bridge arm driver power supply uses bootstrap power technology;
(3) All drivers share a common power supply;
(4) Containing isolated high-voltage fast level shifting circuit (level shifter); (5) The control signal does not require optical transmission.
(5) Control signals do not require optocoupler isolation.

LYD105A is the most important feature is to achieve a single power supply drive, its core technology is the drive power using bootstrap power technology and level shifting circuit, the schematic diagram shown in Figure 4. Among them, bootstrap power consists of R1, D1, C1, IGBT1 and IGBT2 constitute one phase of the bridge arm. It can be seen that the charging circuit of the bootstrap power supply is R1, D1, C1, IGBT2 and N. This single-supply drive technology provides conditions for the system to be designed with a common ground scheme.

LYD105A can efficiently control the development, based on specific system libraries or toolboxes, such as: MATLAB/Simulink. the use of this software is valuable for the direct generation of real-time control algorithms, such as obtaining the dSPACE controller board.