Analog Devices LTC3829EUH | Demoboard DC1675A

Description

Demonstration circuit 1675A is a high efficiency, 6-phase, synchronous buck converter with a 7V to 14V input range that utilizes two LTC®3829 controllers. It can supply 120A maximum load current with a 1.5V output voltage. The LTC3829 is a feature-rich single-output 3-phase synchronousbuck controller with on-chip drivers and remote output voltage sensing. This board is set up with a sense resistor configuration for current sensing. Optional inductor DCR current sensing is possible. The temperature compensation function can guarantee accurate current limit over awide temperature range with DCR sensing.

The Stage Shedding™ function allows the controller to decrease the number of phases to one during a light load condition to save switching losses. Nonlinear control and active voltage positioning (AVP) can improve the transient response. The LTC3829 is suitable for an input voltage ranging from 4.5V to 38V and an output voltage up to 5V. It can provide high efficiency, high power density and versatile power solutions for telecom and datacom systems, industrial and medical instruments, DC power distributionsystems and computer systems. The LTC3829 is available in 38-pin 5mm × 7mm QFN and 38-pin TSSOP packages.

To shut down the converter, set the RUN pin voltage below 1.2V (JP1: Off). Use the JP4 jumper to select Burst Mode® operation, stage shedding mode or forced continuous mode operation at light load. The nonlinear control function is set by JP5 and JP6. The switching frequency is pre-set atabout 400kHz, and can be easily modified from 250kHz to 770kHz. An on-board dynamic circuit is also available for a transient test. Please see LTC3829 data sheet for more detailed information.

Features

Remarks:L1,L2,L3,L4,L5,L6=0.33uH And L7,L8=10uH Used Refer page no.7,8,9.

More information

• Datasheet
• IC product information