The ultrasonic PCB power circuit board relates to a high-power ultrasonic driving device, belonging to the field of ultrasonic driving circuits. The device includes a control module, a DDS signal generation module, a power amplification module, and an output resonance matching module. It can flexibly adjust the output to pulse or continuous ultrasound at any frequency and duty cycle, accurately matching the frequency required by the ultrasonic transducer resonance, and enabling the driving circuit to have pulse emission and continuous emission functions. This utility model can drive 17kHz in pulse or continuous mode? 200KHz ultrasonic cleaning transducer.
The ultrasonic PCB power circuit board is characterized in that it includes a control module, DDS signal generation module, power amplification module, and output resonance matching module. The control module is used to output the control signal A that communicates with the DDS signal generation module, and the control signal B that outputs pulses or continuous waves is transmitted to the power amplification module. The DDS signal generation module outputs one or more sets of inverted high-frequency signals C, The power amplification module is used to amplify the inverted high-frequency signal C output by the DDS signal generation module, and output high-power pulse or continuous square wave D to the output resonance matching module based on the control signal B. The output resonance matching module is used to obtain standard sine wave drive through resonance of high-power pulse or continuous square wave D.
The power amplification module of the ultrasonic PCB power circuit board includes field-effect transistor drivers A1 and A2. A1 and A2 drive the rear circuit to work when the mode selection signal MODE is low level. The rear circuit of A1 and A2 is the excitation end circuit P1 and the bridge amplifier circuit P2. The excitation end circuit P1 contains high-frequency high-power field-effect transistors D1-1 and D1-2, D1-3 and D1-4, which respectively form two groups of totem poles. The output of the two groups of totem poles is to transformer L1, In the resonant state, the output is output backward to the amplifier circuit at the output end of the later stage. The driving square wave generated by the excitation end is divided into four drives through the high-frequency transformer T1, corresponding to four high-frequency high-power field-effect transistors: D2-1, D2-2, D2-3, and D2-4. 3. The high-frequency high-power ultrasonic driving device as claimed in claim 1, characterized in that the output resonance matching module is composed of a frequency selection network composed of capacitors and inductors.
