DC2456A

Demonstration circuit 2456A is a high voltage, high efficiency synchronous buck-boost DC/DC converter with a 16V to 120V input voltage range. It can supply a 10A maximum load current with a 48V output. The demo board features the LTC®3779EFE controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 600kHz, while an optional output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range and seamless transfers between operation modes, the LTC3779 is ideal for industrial, automotive, medical, military and avionics applications. The light load operation mode of the converter is determined with the MODE pin. The converter can also be externally synchronized to an external clock through the PLLIN pin (PLLIN terminal on the board). The power good output (PGOOD terminal) is low when the output voltage is outside of the ±10% regulation window.

• Switching frequency is pre-set at about 200KHz
• Typical efficiency of 98.7% (72VIN, 48VOUT, 10A)
• Typical output ripple of 480mV 48VIN, 48VOUT, 10A

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