TPS40090PWG4

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TPS40090PWG4 Application Field and Working Principle

The TPS40090PWG4 is a multi-phase power controller controller for isolated DC/DC converters with integrated feedback control, providing up to four output phases for efficiency and reliability. The controller provides the necessary control signals and MOSFET AH comparator circuit interface for operating a multi-phase power stage. It aims to manage a buck, boost-buck, or SEPIC topology converter, featuring a wide range of capabilities and flexibility in order to manage demanding loads and optimize overall circuit performance.

Topology Applicability

The TPS40090PWG4 device has been specifically implemented to power an isolated DC/DC converter, either in a single or multi-phase configuration, featuring up to four output phases. The controller outputs several frames for regulating a power converter, operating a buck, boost-buck, or SEPIC topology. It can also manage a flyback-transformer-based converter design.

Key Features

The TPS40090PWG4 offers several key features for high performance, reliability, and flexibility. It includes an adaptive on-time control method, voltage feedforward technique, programmable soft-start, cycle-by-cycle current limit, adaptive deadtime, adjustable UVLO and OVLO, input and output disconnect control, remote sense, and over-temperature thermal protection. Multiple disparate output phases are allowed. It has support for up to 19V output in buck configuration, and up to 30V in boost-buck or boost configurations. The deadtime control adjusts its duration automatically, according to the switching frequency and high-side floating voltage.

Principle of Operation

At its most basic picture, the TPS40090PWG4 powers a multi-phase power stage with dedicated control signals, as well as a MOSFET AH comparator circuit. This controller has three major blocks, an oscillator, modulator, and drivers, as well as an analog buffer. The oscillator provides a fundamental switching frequency of 200 kHz for multi-phase applications, and it can be programmable for other outputs. The modulator is in charge of interpreting the detection signals from the drivers, as well as the reference signals, andgenerate the appropriate pulse width modulation signals according to their values.

The drivers are responsible for raising the signal to the correct voltage level, then the comparator circuit interface is used to provide a signal to the proper gate of the FD MOSFET. This signal conditions and provides the necessary dead-time. The analog buffer helps to extract the precise output voltage from the measurement results, by providing a feedback signal for the control system.

Conclusion

The TPS40090PWG4 is a multi-phase power phase controller for isolated DC/DC converter designs, offering up to four phase outputs with great flexibility, efficiency, and reliability. The controller provides all the necessary control signals from a single IC, and it features adaptive on-time control, voltage feed-forward, programmable soft-start, cycle-by-cyle current limit, adaptive dead-time, adjustable UVLO and OVLO, input and output disconnect control, and over-temperature protection.

The TPS40090PWG4 also allows multi-phase output phases and manipulation of different power topologies, including buck, boost-buck, and flyback topologies. The controller provides an oscillator, a modulator, and a driver interface, working together with the MOSFET AH comparator in order to provide the right voltage signals to the topology of choice. This controller has all the features for a much reliable, flexible and efficient solution for isolated DC/DC converter designs.

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