LTC3829IUHF#PBF

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LTC3829IUHF#PBF is a PolyPhase multi-phase buck controllers from the PolyPhase family of DC/DC switching controllers from Linear Technology Corporation. It is designed to operate from a wide range of input voltages and provides up to 60A of output current. The controller is ideal for use in high-performance power management applications, such as notebooks/portable computers, servers and graphics cards. In addition, the LTC3829IUHF#PBF can be used to efficiently power multiple loads in a single system.

The LTC3829IUHF#PBF is an integrated controller with dual current mode constant frequency control loops that enable it to precisely control two phases in an interleaved buck converter. It features a wide input voltage range of 4.5V to 32V and operates at up to 200kHz per phase. This can be scaled down in discrete steps to maximise efficiency. It also features Adaptive Voltage Positioning (AVP), which enables the controller to switch between voltage levels to maximise efficiency, while current sharing between phases ensures uniform performance over time and temperature.

The controller also features an integrated soft-start function and output voltage tracking, which allows for output voltage sequencing during system start-up. In addition, the LTC3829IUHF#PBF provides a number of protection features, such as overcurrent protection, undervoltage lockout and Overtemperature shutdown.

The LTC3829IUHF#PBF is an excellent choice for high-current and high-efficiency designs, as it provides a highly efficient power conversion solution, which enables optimal load-tracking, high efficiency and accurate current sharing across phase.

The controller works by using a dual-phase control loop, which generates two phase-shifted pulse width modulation (PWM) signals with complementary duty cycles. These PWMs are then used to drive two interleaved, phase-shifted switches in order to generate two constant-frequency switching waveforms, which are 180° out of phase. This ensures that the two waveforms do not cancel each other out, resulting in improved efficiency.

The controller then uses the feedback signal from the current sensing output to monitor the current in each phase and adjust its PWM signal accordingly, in order to maintain the current flowing out of the converter in each phase. This process is known as “current mode control” and allows for accurate load tracking at all load conditions.

The LTC3829IUHF#PBF is an outstanding solution for powering multiple loads in a single system, providing accurate load tracking at high efficiency. It also offers flexible solutions for providing power to a wide range of loads and its integrated protection features ensure reliable operation over time and temperature.

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