TPS546C23EVM1-746

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The TPS546C23EVM1-746 is one of a series of evaluation modules (EVMs) from Texas Instruments for use in the development of power management solutions. It is part of the DC/DC and AC/DC (Off-Line) SMPS (Switched Mode Power Supply) family of EVMs and is suitable for a wide range of applications from powering computer components to providing a safe source of power for consumer and medical devices. This module can be used for development, troubleshooting and prototyping of switch-mode power supplies which can improve system performance or reduce size and cost. It is designed to allow full characterisation of all power stages prior to the final production product.

The TPS546C23EVM1-746 is a buck/boost converter based on the TPS546C23 feedback-controlled regulator. It consists of a demo board and document set to facilitate the evaluation of the TPS546C23 and its associated components. The device is rated at an output current of 5A and an input voltage range from 9V to 36V. The demo board has a built-in current and voltage source as well as thermal protection circuitry to protect against overheat or overcurrent conditions. The board also includes a digital isolator to allow for digital control of the device. Other features of the TPS546C23EVM1-746 include:

• External digital control via I2C, SPI or PWM
• Fault detect output pin
• Programmable switching frequency up to 1.2 MHz
• Flexible control loop response
• Shielded inductor
• Built-in compensation
• Multi-phase operation
• Internal compensation introduction
• Integrated circuit protection

The TPS546C23 is a fully integrated, current mode, low-noise buck/boost converter. The device consists of an 8-bit digital to analog converter (DAC), feedback and control logic, error amplifier, transconductance amplifier, gate drivers and power switches. The device is designed to operate at switching frequencies up to 1.2MHz. The control loop architecture implements a transconductance current mode architecture which provides excellent line and load transient response characteristics.

The TPS546C23 uses an advanced compensation architecture to ensure wide-band operation and stability. The architecture of the TPS546C23 includes an internal compensation network consisting of a transconductance loop filter and a single pole compensation network. The user can adjust the response time of the loop filter using a single resistor connected between the CCOMP pin and ground. The use of an internal compensation network allows the user to reduce external component count and system cost.

The gate-driver circuitry is designed to allow for low-frequency operation but with the ability to switch at frequencies up to 1.2MHz. The built-in asymmetric drive feature provides dead-time for shoot-through protection and delivers an excellent set of waveforms during operation. The device also includes a fault detect output pin which communicates an over-current or over-temperature condition by generating a high-impedance logic output.

The TPS546C23 is a versatile buck/boost converter which makes it an ideal solution for powering DC/DC and AC/DC SMPS applications. It provides the integrated circuitry necessary to provide a clean and reliable power source regardless of the input voltage and has on-board protection features to ensure proper operation. This EVM is a great tool for designers looking to develop a power supply solution for their system.

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