Step-up DC/DC controller without transformers is 96% efficient

23 February 2005 Power Electronics / Power Management

The LT3782 is a step-up DC/DC controller with 2-phase operation to deliver high output power using only two inductors, eliminating the need for power and current sense transformers. This device from Linear Technology can regulate a 50 V output at 4 A load current with 96% efficiency from an input source ranging from 10 V to 36 V. 2-phase operation minimises input and output ripple currents and reduces the value requirements of both the input and output capacitors. It can drive industrial grade high power MOSFETs at high efficiency. It also has adjustable slope compensation, time delay, and undervoltage lockout, as well as synchronous operation and clock synchronisation. The LT3782 uses a constant frequency (150 to 500 kHz) current mode architecture to improve both line and load regulation. It operates from 6 V to 40 V and comes in 28-lead SSOP package.

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