Hi SIR,.
Is it possible for cost down UCC27531 instead of BJT, TPS61170 for charge pump?
or one of the parts for this reference besides ultrasonics,..
Hello,
TPS61170 generates 30V
UCC27531 is a high side driver. 30V is supplied to the UCC27531 via TPS61170.
UCC27531: "its main purpose is to create a 50% duty cycle 30V square wave pulses to excite the transducer. There is one main reason why we used a driver IC instead of a simple circuit consisting of transistors to step up the transmit pulses. The driver ICs offer integrated shoot-through protection, which is needed because shoot-through has two consequences:
a. It drains the output caps of the boost converter quickly. We would need a boost converter with much more power to compensate for these losses.
b. It could simply thermally destroy the transistor stage. "
Is this what you are looking for ?, if not, could you elaborate your question.
further details on Fluid level sensing can be found under 
