AN57 Apex Inkjet Printhead Driver Power Dissipation
Printing industries are rapidly converting from conventional techniques, like offset lithography and rotogravure, to digital technology like inkjet. The printheads of many industrial inkjet printers use piezoelectric technology. In the printheads of so called 'drop-on-demand' (DoD) inkjet printers the piezoelectric nozzles produce ink drops when driven by electric pulses. Since the nozzles behave like electric capacitors and the amount of nozzles in a printhead being fired varies continuously, the amplifier driving the printhead "sees' a very dynamic, capacitive load. Apex Microtechnolog/s power operational amplifiers are very well suited to drive DoD inkjet printheads as they meet the power requirements of and can be tuned to this specific application by external components. This application note describes a way to derive the internal power dissipation of an Apex power op amp driving a DoD inkjet printhead.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2016/10/14 |
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Rev A |
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AN57U;AN57 |
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534 KB |
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