TPS62046EVM-229

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TPS62046EVM-229 is an energy-efficient, low-power DC/DC and AC/DC switching regulator evaluation module (EVM) designed to enable designers to easily evaluate Texas Instruments TPS62046 3.3 V or 12 V synchronous buck converter. The TPS62046EVM-229 consists of a TPS62046 switching regulator, USB-controlled graphical user interface (GUI), output switch, power LED and various support components. It is capable of converting an input voltage up to 25 V into an adjustable output voltage from 0.95 V to 14 V with a maximum output current of 5A.

The TPS62046EVM-229’s main application field is in evaluating the TPS62046 for use in portable, battery-powered systems such as laptop computers, video game systems, cell phones, and PDAs. It is also suitable for power-supply applications such as DC-DC converters, adapter-battery chargers, post-regulator primary supplies, and point-of-load (POL) supplies.

The working principle of the TPS62046EVM-229 is based on its integrated TPS62046 switching converter. The switching regulator can accept input voltages up to 25V and is capable of converting them into adjustable output voltages from 0.95 V to 14 V with a maximum output current of 5 A. The output voltage is set by the external resistors R1 and R2. The TPS62046 utilizes peak current-mode control and synchronous rectification to deliver over 95% efficiency. The switching frequency is programmable from 500 kHz to 3 MHz which allows device to be optimized for minimum external component size and cost without compromising noise performance. The TPS62046 also includes a switching frequency synchronization pin that can be used to lock the switching frequency to an external clock.

The TPS62046EVM-229 operates in one of four user-selectable modes: PWM, PFM, PWM+PFM, or forced PWM. PWM is a continuous conduction mode where the output is regulated by varying the duty cycle of the switching pulses. PFM is discontinuous conduction mode where the output is regulated by varying the on-time of the switching pulses. The PWM+PFM mode combines the advantages of the PWM and PFM modes by running the converter in PWM mode for light loads and PFM mode for heavier loads. The forced PWM mode is useful when output ripple needs to be minimized at light loads.

The TPS62046EVM-229 also features an enable pin and a power good output. The enable/shutdown pin can be used to put the converter in low standby current mode (2.7 mA typical at no load and 3.6 mA maximum). The power good output pin provides a logic high signal whenever the output voltage is within a predetermined range, indicating to the user that the converter is operating properly.

In summary, the TPS62046EVM-229 is designed to provide easy evaluation for designers looking to use the TPS62046 in their application. Its low power operation and high efficiency make it well suited for portable, battery powered systems that require adjustable output voltage. It is a compact and easy to implement solution for DC/DC and AC/DC switching regulator applications, and its flexible switching frequency allows for optimization with minimal external component size and cost.

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