EVB_RT7238DGQUF

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Consider the EVB_RT7238DGQUF evaluation board. As one of the series of evaluation boards for DC/DC & AC/DC (Off-Line) SMPS, the EVB_RT7238DGQUF can help designers rapidly develop and evaluate products from RT7238. With its help, designers can avoid the complicated circuit selection procedure, shorten production time and reduce the cost.

The application field of EVB_RT7238DGQUF covers power supplies, LCD monitors, adapters, online UPS and digital set-top boxes. Most of the above mentioned products need 5V, 3.3V or other specified output to work properly. EVB_RT7238DGQUF allows designers to select the certain voltage to drive the device. As for the output power and current, EVB_RT7238DGQUF can output up to 4A and 5W.

Besides, EVB_RT7238DGQUF also supports wide input voltage range, and it can work normally under input voltage from 9V to 20V. Thus, EVB_RT7238DGQUF is popularly used in many electronic products.

As for its working principle, it is based on the RT7238 SMPS controller, which is specially designed for DC/DC & AC/DC (Off-Line) SMPS. When the input voltage is changed, the voltage feedback adjust the VCC of RT7238 to regulate the output voltage.

When the output voltage reaches the targeted level, the voltage feedback part will send an signal to the VCC pin of RT7238 to adjust the power switch duty cycle. By adjusting the power switch duty cycle, the output voltage is kept in a regulated level. When the output or the input voltage changes, the PWM duty cycle will be adjusted accordingly to keep the output voltage in a preset voltage range.

As for the protection functions, the EVB_RT7238DGQUF employs the primary-side detection technology. Under voltage lockout, over voltage protection, over-current protection, temperature protection and short-circuit protection, the EVB_RT7238DGQUF is able to guarantee its safe and stable operation.

What’s more, the EVB_RT7238DGQUF has the operating temperature range from -40℃ to +105℃, offering the user a wide application space. In conclusion, with its wide supply voltage range, powerful output power and excellent protection functions, EVB_RT7238DGQUF is quite popular with designers in the field of DC/DC & AC/DC (Off-Line) SMPS.

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