MCP1664 click

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  • MIKROE-2548
  • MIKROE-2548
MCP1664 click  contains 4 high-power white LEDs. It carries the  MCP1664 , a...more
Product information "MCP1664 click"

MCP1664 click contains 4 high-power white LEDs. It carries the MCP1664, a high-voltage step-up LED driver from Microchip. MCP1664 click is designed to run on either 3.3V or 5V power supply. It communicates with the target board microcontroller over the PWM pin on the mikroBUS™ line.


Note: Don't look directly at the LEDs while they are on, you could damage your eyesight. 

How the MCP1664 click works 

The click has a power input and a PWM input, so you can set the light intensity at the level you want.

MCP1664 IC features

The MCP1664 is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive multiple strings of LEDs with constant current powered from two and three-cell alkaline or NiMH/NiCd as well as from one-cell Li-Ion or Li-Polymer batteries. 

The MCP1664 features an open load protection (OLP) which turns off the operation in situations when the LED string is accidentally disconnected or the feedback pin is short-circuited to GND.

While in Shutdown mode (EN = GND), the device stops switching and consumes 40 nA typical of input current. 


Type Boost
Applications White LED Driver for Backlighting Products, Li-IonBattery LED Lightning Application, etc.
On-board modules MCP1664 module from Microchip
Key Features You can set the light intensity
Interface PWM
Input Voltage 3.3V or 5V
Compatibility mikroBUS
Click board size L (57.15 x 25.4 mm)

Pinout diagram

This table shows how the pinout on RN4871 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.pngPinNotes
  NC 1 AN PWM 16 PWM PWM input
  NC 2 RST INT 15 NC  
  NC 3 CS TX 14 NC  
  NC 4 SCK RX 13 NC  
  NC 5 MISO SCL 12 NC  
  NC 6 MOSI SDA 11 NC  
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

Maximum ratings

Supply Voltage 2.4   5.5 V
Max Out Voltage     32 V
Max Out Current 4.2V Vin 8 LEDs 150     mA
Max Out Current 3.3V Vin 4 LEDs 200     mA
Max Out Current 5.0V Vin 4 LEDs 300     mA


Code examples for MCP1664 click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

This code snippet shows basic control of light brightness with PWM. The duty cycle is controled with the potentiometer P1.

01  uint16_t current_duty;
02   uint16_t adc_rd;
03   void MCU_Init()
04   {
05     TRISC = 0;                          // designate PORTC pins as output
06     LATC  = 0;                          // set PORTC to 0
07     PWM2_Init( 5000 );                  // Initialize PWM2 module at 5KHz
08   }
09   void main()
10   {
11     MCU_Init();
12     current_duty  = 0;
13     PWM2_Start();
14     PWM2_Set_Duty(current_duty);
15     while ( 1 )                     // Playing with Potentiometer P1 you can control current PWM duty cycle
16     {
17       adc_rd = ADC_Read(1) & 0x0000FFFF; // Read 10 - bit ADC value and set newly acquired 8 - bit PWM duty
18       current_duty = adc_rd / 4 ;
19       PWM2_Set_Duty(current_duty );      // Set newly acquired duty
20      }
22   }


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