Could you me what this transformer is doing in dc circuit?

AI Thread Summary
A thermoelectric generator induces DC current, but a transformer cannot directly step up DC voltage. Instead, the transformer operates by creating an AC current through a switch in the primary circuit, typically functioning at frequencies between 10 kHz and 100 kHz. This AC current is then stepped up in voltage to power the circuit. The chip also features a charge pump and allows for user-programmable output voltages of 2.35V, 3.3V, 4.1V, or 5V. The datasheet provides further insights into its functionalities.
amit016
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Thermoelectric generator induce DC current and I just wants to understand how can a transformer step up DC. If there is something else please make me clear.
 

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This chip is complicated, but the essence of your question is easily answered. The pin marked SW is a switch that closes the primary circuit to ground at the circuit's operating frequency, which is typically 10's of kHz to 100 kHz. This creates an AC current in the transformer primary that steps up in voltage to power the rest of the circuit. There is also a "charge pump" consisting of C1 and circuitry in the chip.
 
what a neat little chip
The datasheet makes a good read

Dave
 
davenn said:
what a neat little chip
The datasheet makes a good read

Dave
Indeed. You can get the datasheet from their LTC3108 product page.

What I like about it is the output is user programmable using VS1 and VS2 for:
2.35V, 3.3V, 4.1V, or 5V
 
thanks guys, for your time. I appreciate that.
 

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