LM22670EVAL

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The LM22670EVAL evaluation module is a field programmable device that is used to operate an off-line DC/DC or AC/DC SMPS. The LM22670EVAL evaluation module offers an efficient, easy-to-use, cost-effective way for users to test and design their own circuit boards for AC/DC and DC/DC converters. The LM22670EVAL evaluation module is specifically designed to be used in high power, low voltage voltage regulator applications.

The LM22670EVAL evaluation module provides a complete range of features to help users in their designs, ranging from system level design to component level testing. It features adjustable frequency buck/boost, DC/DC and AC/DC converters with adjustable frequency and peak current capability. There are two independent adjustable fixed-out pins which provide two separate voltage regulation stages for the load bias and peak current regulation. It also features soft start and an adjustable soft start time. The LM22670EVAL evaluation module utilizes cyclic redundancy check (CRC) technology to enable communication with the host board, allowing for efficient, low-error-rate data transmission.

The module features three external power components, including a high-side MOSFET (metal-oxide-semiconductor field-effect transistor), a low-side MOSFET (metal-oxide-semiconductor field-effect transistor) and a boost diode. The module also features two internal bypass capacitors for output filtering purposes, one discrete (LDO; low-dropout) regulator, one clock oscillator and one external resistor to program the soft start time. The module is programmed for standard low voltage values and includes the necessary components and gauge points for easy debugging and troubleshooting.

The LM22670EVAL evaluation module uses the basic concept of input-output (I/O) voltage regulation. The I/O voltage regulator is designed to maintain a constant output voltage over a wide range of input voltages and to maintain the output voltage under varying load conditions. The module operates in two modes: buck or boost. In buck mode, the voltage is stepped down from the input and in boost mode, the voltage is stepped up from the input. The LM22670EVAL module’s maximum output voltage is 32 volts.

The board is supplied with a host board for programming and later use with an externally connected power supply or battery. The programming can be done using the host board and the LM22670EVAL USB connector for power. The programming also includes automated parameter settings adjustment and thermal derating control. After successful programming, the host board may be removed from the module for more compact systems.

The LM22670EVAL evaluation module also includes safety features such as overvoltage protection (OVP), overcurrent protection (OCP) and short-circuit protection (SCP). The OCP provides a single setpoint for the output current that is set using the on-chip trim resistor. The SCP monitors and corrects the output voltage for short circuit events that are detected by the turn-on signal. All these features enable users to design reliable and robust systems and circuits.

In summary, the LM22670EVAL evaluation module is designed for applications such as high power, low voltage voltage regulator applications. The module provides features such as adjustable frequency buck/boost, DC/DC and AC/DC converters with adjustable frequency and peak current capability. It also has safety features such as overvoltage protection (OVP), overcurrent protection (OCP) and short-circuit protection (SCP) to add extra reliability and robustness. It is a highly efficient, easy-to-use, cost-effective device for those wanting to test and design their own circuit boards for AC/DC and DC/DC converters.

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