MIKROE-2762

MIKROE-2762 Datasheet

PID MIKROE-2762 Weight 26 g

Part	Datasheet
MIKROE-2762	MIKROE-2762 (pdf)

PDF Datasheet Preview
MCP16331 click PID MIKROE-2762 Weight 26 g MCP16331 click functions as a non-inverting buck-boost voltage regulator, a type of switching mode power supply topology that combines the principles of the Buck converter step-down and the Boost converter step-up in a single circuit. The Buck converter produces a DC output in a range from 0V to just less than the input voltage. The Boost converter produces an output voltage ranging from the same voltage as the input to a level much higher than the input. The MCP16331 click itself produces constant DC voltage on the output rails, which can be set in the code. A typical application for a buck-boost regulator is a battery-powered system, where the input voltage can vary widely, starting at full charge and gradually decreasing as the battery charge is used up. At full charge, where the battery voltage may be higher than needed by the circuit, a buck regulator would be ideal to keep the supply voltage steady. Figure 1 However as the charge diminishes the input voltage falls below the level required by the circuit, and either the battery must be discarded or re-charged at this point, the ideal alternative would be the boost regulator. By combining these two designs, it is possible to have a regulator circuit that can cope with a wide range of input voltages both higher or lower than that needed by the circuit. How the MCP16331 click works The click board TM central module is the Microchip's MCP16331, a non-synchronous, stepdown or buck converter capable of stepping input voltages ranging from 4.4V to 50V, and output voltage ranging from to 2.0V to 24V. More details about the MCP16331 are available in the official datasheet. The MCP16331 click is designed to handle an input voltage ranging from 4.5V to 18V and output a voltage ranging from 2,25V to 12V at 500 mA maximum current. The power source is connected to the TB1 VIN terminal, and the load is connected to the TB2 VOUT terminal, at the top of the click board as you can see in figure The power circuit is isolated from the logic circuit that, as per the mikroBUS standard, can operate at 3.3V or 5V. The voltage is selectable via JP1 switch, by default set at 3.3V, and the green LED LD1 indicated that this voltage is present. The MCP16331 click uses the SPI bus present on the mikroBUS , to communicate with the host processor, however, also uses two extra pins AN and RST that are used respectively for measuring the output voltage and enabling or disabling the MCP16331 output, this is important for the correct power sequence see note below . NOTE To avoid any possible damage to any load connected to the VOUT terminals, you must follow the correct power-up sequence: Disable the MCP16331 by setting the mikroBUS pin RST EN low GND Set the desired output voltage via SPI see the software section below Enable the MCP16331 by setting the mikroBUS pin RST EN high 5V The reason for this sequence is that the enable pin EN of the MCP16331 has an internal pull-up resistor that keeps the MCP16331 output stage enabled even if the pin is left unconnected. At power-up, before you set the voltage via SPI, DAC output is unspecified and the output voltage may set higher than what your load supports. Setting up the desired output voltage is easy if you use the libraries we developed for this click board . We made available a specific function that sets the VOUT voltage see below in the Software Support section . The MCP16331 click gives you the possibility to read the output voltage via analog pin AN . Using the microcontroller ADC you can read the value, divided by the two 120K and 33K resistors R1 and R4 on the schematic that you can calculate with the formula: So let's suppose that you have set the voltage at 5V: In this case 1,07V. This feedback mechanism is useful when you want to set an exact voltage. You can measure the output and adjust the voltage. Specifications Type On-board modules Interface Input Voltage Click board size Buck MCP16331 high-voltage input integrated switch step-down regulator SPI 3.3V or 5V L x mm Pinout diagram This table shows how the pinout on MCP16331 click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns . Notes Reads the output voltage Enable SPI chip select SPI clock SPI slave data out SPI slave data in Power supply Ground Notes ADC_OUT 1 AN PWM 16 NC EN CS SCK SDO SDI 2 RST INT 15 NC TX 14 NC 4 SCK RX 13 NC 5 MISO SCL 12 NC 6 MOSI SDA 11 NC +3.3V 7 3.3V 5V 10 +5V 8 GND 9 GND Power supply Ground MCP16331 click maximum ratings Input Voltage Range VIN Unit

PDF Datasheet Preview

MCP16331 click

PID MIKROE-2762 Weight 26 g

MCP16331 click functions as a non-inverting buck-boost voltage regulator, a type of switching mode power supply topology that combines the principles of the Buck converter step-down and the Boost converter step-up in a single circuit. The Buck converter produces a DC output in a range from 0V to just less than the input voltage. The Boost converter produces an output voltage ranging from the same voltage as the input to a level much higher than the input. The MCP16331 click itself produces constant DC voltage on the output rails, which can be set in the code. A typical application for a buck-boost regulator is a battery-powered system, where the input voltage can vary widely, starting at full charge and gradually decreasing as the battery charge is used up. At full charge, where the battery voltage may be higher than needed by the circuit, a buck regulator would be ideal to keep the supply voltage steady.

Figure 1

However as the charge diminishes the input voltage falls below the level required by the circuit, and either the battery must be discarded or re-charged at this point, the ideal alternative would be the boost regulator.

By combining these two designs, it is possible to have a regulator circuit that can cope with a wide range of input voltages both higher or lower than that needed by the circuit.

How the MCP16331 click works

The click board TM central module is the Microchip's MCP16331, a non-synchronous, stepdown or buck converter capable of stepping input voltages ranging from 4.4V to 50V, and output voltage ranging from to 2.0V to 24V. More details about the MCP16331 are available in the official datasheet.

The MCP16331 click is designed to handle an input voltage ranging from 4.5V to 18V and output a voltage ranging from 2,25V to 12V at 500 mA maximum current. The power source is connected to the TB1 VIN terminal, and the load is connected to the TB2 VOUT terminal, at the top of the click board as you can see in figure

The power circuit is isolated from the logic circuit that, as per the mikroBUS standard, can operate at 3.3V or 5V. The voltage is selectable via JP1 switch, by default set at 3.3V, and the green LED LD1 indicated that this voltage is present.

The MCP16331 click uses the SPI bus present on the mikroBUS , to communicate with the host processor, however, also uses two extra pins AN and RST that are used respectively for measuring the output voltage and enabling or disabling the MCP16331 output, this is important for the correct power sequence see note below .

NOTE To avoid any possible damage to any load connected to the VOUT terminals, you must follow the correct power-up sequence:

Disable the MCP16331 by setting the mikroBUS pin RST EN low GND Set the desired output voltage via SPI see the software section below Enable the MCP16331 by setting the mikroBUS pin RST EN high 5V The reason for this sequence is that the enable pin EN of the MCP16331 has an internal pull-up resistor that keeps the MCP16331 output stage enabled even if the pin is left unconnected. At power-up, before you set the voltage via SPI, DAC output is unspecified and the output voltage may set higher than what your load supports. Setting up the desired output voltage is easy if you use the libraries we developed for this click board . We made available a specific function that sets the VOUT voltage see below in the Software Support section . The MCP16331 click gives you the possibility to read the output voltage via analog pin AN . Using the microcontroller ADC you can read the value, divided by the two 120K and 33K resistors R1 and R4 on the schematic that you can calculate with the formula:

So let's suppose that you have set the voltage at 5V:

In this case 1,07V. This feedback mechanism is useful when you want to set an exact voltage. You can measure the output and adjust the voltage.

Specifications

Type On-board modules Interface Input Voltage Click board size

Buck MCP16331 high-voltage input integrated switch step-down regulator SPI 3.3V or 5V L x mm

Pinout diagram

This table shows how the pinout on MCP16331 click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns .

Notes

Reads the output voltage Enable

SPI chip select SPI clock

SPI slave data out SPI slave data in

Power supply

Ground

Notes

ADC_OUT 1 AN PWM 16 NC

EN CS SCK SDO SDI
2 RST INT 15 NC

TX 14 NC
4 SCK RX 13 NC
5 MISO SCL 12 NC
6 MOSI SDA 11 NC
+3.3V 7 3.3V 5V 10 +5V
8 GND 9 GND

Power supply

Ground

MCP16331 click maximum ratings

Input Voltage Range VIN

Unit

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MIKROE-2762 Datasheet file may be downloaded here without warranties.

Datasheet ID: MIKROE-2762 649423