DC1197A

DC1197A is a demo board for LT3572 dual full-bridge piezo driver with 900mA boost converter. Demonstration circuit 1197 features LT3572 in a 800KHz step-up converter circuit, designed for 30V output from a 3V to 5V input. The high output voltage is then used by the dual full-bridge drivers. The LT3572 is capable of independently driving two Piezo motors with two input PWM signals. The motors respond accordingly based on the duty cycle and the frequency of the PWM signals. The drivers operate in an H-bridge fashion, where the OUTA and OUTB pins are the same polarity as the PWMA and PWMB pins respectively and the (active low) OUTA and (active low) OUTB are inverted from PWMA and PWMB respectively. A (active low)PGOOD pin indicates when the output of the step-up converter is in regulation and the Piezo drivers can start switching. The step-up converter and both Piezo drivers have their own shutdown control.

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