Analog Devices LTC3779 | Demoboard DC2456A

Description

Demonstration circuit 2456A is a high voltage, high efficiencysynchronous buck-boost DC/DC converter witha 16V to 120V input voltage range. It can supply a 10Amaximum load current with a 48V output. The demoboard features the LTC®3779EFE controller. The constantfrequency current mode architecture allows a phase-lockablefrequency of up to 600kHz, while an optional outputcurrent feedback loop provides support for applicationssuch as battery charging. With a wide input range, wideoutput range and seamless transfers between operationmodes, the LTC3779 is ideal for Industrial, Automotive,Medical, Military and Avionics applications. The light load operation mode of the converter is determinedwith the MODE pin. Use JP2 jumper to select pulseskippingmode or forced continuous mode (CCM) operation.The switching frequency is pre-set at about 200kHz.The converter can also be externally synchronized to anexternal clock through the PLLIN pin (PLLIN terminal onthe board). To shut down the converter, force the RUN pinbelow 1.2V (SW1: OFF). The power good output (PGOODterminal) is low when the output voltage is outside of the±10% regulation window.

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