TPS82740AEVM-617

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The TPS82740AEVM-617 is a full-featured evaluation module designed to help users quickly assess the capabilities of the TPS82740A to drive high performance off-line or DC/DC synchronous-rectified switchmode power supplies (SMPS) with multi-mode dynamic voltage scaling (DVS). This EVM offers adjustable operating frequency, high line voltage transient immunity, wide VIN range, and a wide range of regulated output voltage.

The TPS82740AEVM-617 is a logic-level controller suitable for a wide variety of off-line AC/DC, DC/DC, and other switchmode power supply applications. It is an optimized controller for low power converters, such as LED backlight and dimming, DSL modem, router, and smart home applications. It is intended as a reference design and evaluation tool for TI customers looking to develop their own synchronous-rectified SMPS converters.

Application Field

The TPS82740AEVM-617 is highly suitable for low-power SMPS applications such as LED drivers, DSL modems/routers, and smart home solutions. The TPS82740A is a high-performance switching regulator controller integrating high level of integration and precise output regulation. It is optimized for low-power applications that requires tight output voltage tolerances and high efficiency.

The TPS82740A supports multiple operating modes, including PWM, PFM, and Burst Mode operation. Its operating frequency can be adjusted, as well as its high and low line transient immunity. This makes it a great choice for low-power SMPS applications. It also features different type of protection functions, including over voltage protection, under voltage protection, over temperature protection and power good.

Working Principle

The TPS82740AEVM-617 is based on the TPS82740A internal PWM controller. It provides an adjustable switching frequency between 80KHz and 1.2MHz, and 100% peak current mode control. This internal circuitry allows it to generate a high-voltage gate drive to external switch, and control its conduction duty cycle, keeping the output voltage in tight regulation. Moreover, it offers high and low line transient immunity and an adjustable output voltage range.

The TPS82740AEVM-617 uses an optimized non-overlapping PWM scheme that implements a PFM mode with a single low-side switch for maximum efficiency and EMI improvement. The controller also features variable frequency option for light load operation, as well as Burst Mode operation.

In addition, the EVM offers many safety features, such as the detection of abnormal supply voltage, current limit protection, and current share support. The TPS82740AEVM-617 includes single- and dual-output boards with maximum output current of 1.5A and 0.7A, respectively.

In summary, the TPS82740AEVM-617 module is an excellent choice for a wide range of off-line AC/DC, DC/DC, and other switchmode power supply applications and can help TI customers design their own synchronous-rectified SMPS converters. It offers adjustable operating frequency, high line voltage transient immunity, wide VIN range, adjustable output voltage range, and various protective functions.

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