MCP1664 Click Board

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MCP1664 Click Board

Product Description

The MCP1664 Click Board™ 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.

How Does The MCP1664 Click Board Work? 

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. 

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the MCP1664 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
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

Software Support

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 }
21
22 }

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