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Mikroelektronika d.o.o.

Current Limit 5 Click Board™

Current Limit 5 Click Board™

SKU: MIKROE-4999
Regular price
m.23.00 AZN exc tax
Regular price m.33.00 AZN Sale price
m.23.00 AZN exc tax
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Key Features

  • Integrated protection features, programmable current limiting up to 1.05A, soft start that prevents large current inrush, enable feature, automatic-on output after fault, and more
  • Based on the MIC2099 - current-limiting device with an adjustable overcurrent protection feature from Microchip Technology
  • Can be used for applications in portable equipment and condition monitoring or power supplies, protecting them in short circuits or other overload conditions
  • mikroBUS: I2C Interface
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Overview

The Current Limit 5 Click Board™ is a compact add-on board representing a current-limiting solution. This board features the MIC2099, a current-limit power distribution switch from Microchip Technology. This Click board™ represents a programmable current limit solution with various protection features and fault indication, which operates from a 2.5V to 5.5V input voltage range. Also, the current limit is adjustable from 100mA up to 1.05A programmed through the MCP4561 digital potentiometer. This Click board™ is suitable for applications in portable equipment and condition monitoring or power supplies, protecting them in short circuits or other overload conditions.

The Current Limit 5 Click Board™ is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.

How Does The Current Limit 5 Click Board™ Work?

The Current Limit 5 Click Board™ is based on the MIC2099, a current-limiting device with an adjustable overcurrent protection feature from Microchip Technology. The MIC2099 offers flexible protection boundaries for systems against input voltage ranging from 2.5V to 5.5V and limits the output load current to a programmed level (up to 1.05A). Additional safety features include thermal shutdown protection to prevent overheating, under-voltage lock-out, a soft start that prevents large current inrush, as well as automatic-on output after a fault condition.

Current Limit 5 click inner

The current-limit switch is virtually ubiquitous in system control and provides a safe means for regulating the current delivered to a load circuit. It allows the load current to increase to a programmed limit but no higher. Typically, the current limit is a function of the voltage across an external resistor, and this voltage serves as the reference for an internal current-limiting amplifier. By replacing the resistor with a digital potentiometer, you can easily program the current limit as performed on this Click board™. For this purpose, the digital potentiometer MCP4561 from Microchip Technology which communicates with the MCU via 2-Wire I2C serial interface, is used to set the resistance on the MIC2099 LIMIT pin, adjusting the current limit for the switch between 0.1A to 1.05A.

The Current Limit 5 Click Board™ can be enabled or disabled through the EN pin routed to the CS pin of the mikroBUS™ socket; hence, offering a switch operation to turn ON/OFF power delivery to the connected load. It also provides a fault status indication signal, labelled as FLT and routed to the INT pin of the mikroBUS™ socket, alongside its LED indicator marked as FAULT to indicate different fault conditions such as current limit and thermal shutdown.

The Current Limit 5 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the communication lines properly. Additionally, there is a possibility for the MIC2099 power supply selection via jumper labelled as VIN SEL to supply the MIC2099 from an external power supply VEXT terminal in the range from 2.5V to 5.5V or with VCC voltage levels from mikroBUS™ power rails. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

SPECIFICATIONS

Type Power Switch
Applications The Current Limit 5 Click Board™ can be used for applications in portable equipment and condition monitoring or power supplies, protecting them in short circuits or other overload conditions
On-board modules MIC2099 - current-limiting device with an adjustable overcurrent protection feature from Microchip Technology
Key Features Integrated protection features, programmable current limiting up to 1.05A, soft start that prevents large current inrush, enable feature, automatic-on output after fault, and more
Interface I2C
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)
Input Voltage 3.3V or 5V,External

PINOUT DIAGRAM

This table shows how the pinout of the Current Limit 5 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 1 AN PWM 16 NC
NC 2 RST INT 15 FLT Fault Indication
Enable EN 3 CS RX 14 NC
NC 4 SCK TX 13 NC
NC 5 MISO SCL 12 SCL I2C Clock
NC 6 MOSI SDA 11 SDA I2C Data
Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply
Ground GND 8 GND GND 9 GND Ground

ONBOARD SETTINGS AND INDICATORS

Label Name Default Description
LD1 PWR - Power LED Indicator
LD2 FAULT - Fault Status LED Indicator
JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V
JP2 VIN SEL Left MIC2099 Power Supply Selection INT/EXT: Left position INT, Right position EXT

CURRENT LIMIT 5 CLICK ELECTRICAL SPECIFICATIONS

Description Min Typ Max Unit
Supply Voltage VCC 3.3 - 5 V
External Supply Voltage VEXT 2.5 - 5.5 V
Current Limit Range 0.1 - 1.05 A
Operating Temperature Range -40 +25 +85 °C

 

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