Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3782
Edited by the Electronicstalk Editorial
Team on 01 April 2005
Step-up DC/DC controller is 96%
efficient
The LT3782 is a step-up DC/DC controller with two-phase operation to deliver high output power using only two inductors.
Linear Technology has introduced the LT3782, a step-up DC/DC controller with two-phase operation to deliver high output power using only two inductors, eliminating the need for power and current sense transformers The LT3782 can regulate a 50V output at 4A load current with 96% efficiency from an input source ranging from 10V to 36V
This article was originally published on Electronicstalk on 3 Oct 2008 at 8.00am (UK)
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The 2-phase operation minimises input and output ripple currents and reduces the value requirements of both the input and output capacitors.
With 10V gate drive and 4A peak drive current, the LT3782 can drive industrial grade high power MOSFETs at high efficiency.
Furthermore, with adjustable slope compensation, time delay, and undervoltage lockout, as well as synchronous operation and clock synchronisation, a power supply designer can tailor the circuit to achieve optimum performance.
Applications for the LT3782 include automotive, avionics, telecomms and basestations where a step-up DC/DC convertor must deliver high power with low heat dissipation and occupy a small space.
The LT3782 uses a constant frequency (150 to 500kHz) current mode architecture to improve both line and load regulation, reduce the size of inductors and capacitors and provide a precision pulse-by-pulse current limit.
For synchronous applications, the LT3782 provides synchronous gate signals with programmable falling edge delay to avoid cross conduction when using external MOSFET drivers.
The LT3782 operates from a wide input range of 6 to 40V; the maximum output voltage is dependent on the choice of external components.
Other features include soft-start to reduce inrush current and duty cycle clamp to protect the MOSFETs and improve system reliability.
The LT3782 is offered in a thermally enhanced 28-lead SSOP and is rated for operation from -40 to +125C.
The 1000-piece price is $4.70 each. Request a free brochure from Linear Technology Corp ...
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