Introduction

The MP1 and high efficiency make it a popular choice for a wide range of applications. In this blog post, we'll delve into the various aspects of the MP1584EN, from its description to its technical intricacies.584EN is a versatile and widely used step-down (buck) voltage regulator. It's compact size.

MP1584EN Description

The MP1584 is a high-frequency step-down switching regulator integrating an internal high-side high-voltage power MOSFET. MP1584 adopts the current control mode, which can provide 3A current output and fast loop response through a simple compensation design. The wide input range of 4.5V to 28V makes it suitable for a variety of step-down applications, including those in automotive environments. The 100µA operating quiescent current allows use in battery-powered applications. By reducing switching frequency under light load conditions to reduce switching and gate drive losses, the MP1584 achieves high conversion efficiency over a wide load range. The frequency reduction function helps prevent the inductor current from running out of control during startup, and the over-temperature protection ensures the stability and reliability of operation. Using a high frequency of 1.5MHz, the MP1584 can prevent EMI (electromagnetic interference) noise problems in some applications, such as possible interference problems in AM radio and ADSL applications.

Figure1-MP1584EN

MP1584EN Pinout

Figure2- MP1584EN Pinout

The MP1584EN typically comes in a small form factor with a few pins that serve different functions:

• VIN (Pin 1): Input voltage.
• GND (Pin 2): Ground reference.
• EN (Pin 3): Enable the pin, used for turning the regulator on or off.
• FB (Pin 4): Feedback pin, used to set the output voltage.
• SW (Pin 5): Switching node.
• VOUT (Pin 6): Output voltage.

MP1584EN Specification

MP1584EN Datasheet

MP1584EN Features

The MP1584EN boasts several features that contribute to its popularity:

Wide Input Voltage Range: It can handle a wide range of input voltages, making it suitable for various power sources.

High Efficiency: Thanks to its synchronous rectification, it achieves high conversion efficiency, minimizing power loss.

Adjustable Output Voltage: The output voltage can be adjusted via an external resistor divider network connected to the FB pin.

Over-Current Protection (OCP): It has built-in protection against excessive output currents, safeguarding connected devices.

Thermal Shutdown: The device includes a thermal shutdown feature that prevents it from overheating.

Small Footprint: Its compact size makes it suitable for space-constrained applications.

MP1584EN Package

The MP1584EN is available in various packages, including the standard TO-220 and TO-263 packages. These packages provide different levels of thermal performance and ease of soldering, catering to different application needs.

Figure3-package

MP1584EN application circuit

Figure 4: Example application circuit using the MP1584EN

In Figure 4, you can see a typical application circuit using the MP1584EN. The input voltage (VIN) and ground (GND) are connected to Pins 1 and 2, respectively. The feedback network sets the desired output voltage, and Pin 3 (EN) controls the enable/disable function.

Technical Aspects of the MP1584EN

The MP1584EN operates on a pulse-width modulation (PWM) control scheme, regulating the output voltage by adjusting the duty cycle of the internal switch. It employs synchronous rectification to enhance efficiency, utilizing both a high-side and a low-side MOSFET.

Thermal considerations are important when using the MP1584EN, as excessive heat can affect its performance. Adequate heat sinking or airflow should be provided in high-power applications.

In conclusion, the MP1584EN is a versatile and efficient step-down voltage regulator that finds its way into a myriad of electronic devices. Its compact size, wide input voltage range, and high efficiency make it a popular choice among engineers and hobbyists alike.

MP1584EN Application

The MP1584EN finds applications in a wide array of devices and systems, including but not limited to:

Battery-Powered Devices: It's used to efficiently regulate battery voltages to power various components.

Voltage Regulator Modules: It's employed in voltage regulator modules for microcontrollers, sensors, and other components.

LED Drivers: It's utilized in LED driver circuits to provide stable and regulated power to LEDs.

IoT Devices: It's a popular choice for low-power IoT devices that require efficient voltage regulation.

MP1584EN Applications Case in Real Word

1. Can we use MP1584EN for a 3D Printer?

 my goal here was to step down the 24v power supply on my 3D printer to a 12v power source so I could upgrade the poor cooling on my Ender 3 v2.

After reading the reviews about the input capacitor popping, I decided to do my initial test start with everything still open. The printer fired up, no pop, everything looked good. I closed up the power supply, with its custom cover and new 90mm fan.

When plugging in my Raspberry Pi to the front USB port I always seemed to get the display screen powering up, no doubt powered by the USB port. That said, this time I noticed something different. The new fan I installed also started up but at a very low RPM. I powered up the printer and immediately "POP!"... There goes the capacitor.

If I had to venture a guess, I'd say the cap was overloaded by a mixture of the power supplied through the USB port PLUS the power created by the power supply. Unfortunately, without some additional wiring, it doesn't seem like there is a way around this problem. THAT SAID, even with the popped capacitor the 12v.

2. How did you use the buck converter in your project?

I used this buck converter to convert a set of solar LED string lights to run off the 12v battery in my tent camper. I simply connected it to a spare 12v battery on my bench to set the output to 3.5v before shrink-wraping and installing it by splicing it into the existing exterior light circuit on the trailer. I was concerned that a higher input voltage while charging the trailer battery may affect the output voltage but it does not. Steady 3.5v regardless of input voltage. I will report back on dependability and heat generation after I've run them for an extended time in a few weeks.

Notes: Remember to consult the datasheet and application notes provided by the manufacturer for detailed specifications and guidelines on using the MP1584EN in your specific application. Happy tinkering!