Mikroelektronika d.o.o.
Carte à clic MCP1664
Carte à clic MCP1664
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Le MCP1664 Click Board™ contient 4 LED blanches haute puissance. Il est équipé du MCP1664, un pilote LED élévateur haute tension de Microchip.
La carte Click Board™ MCP1664 est conçue pour fonctionner sur une alimentation de 3,3 V ou 5 V. Elle communique avec le microcontrôleur de la carte cible via la broche PWM sur les lignes MikroBUS.
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
| Type | LED Drivers |
| 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 |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
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
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| 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 |
Software Support
Code examples for the MCP1664 Click Board™, 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 controlled 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 }
21
22 }
Carte à clic MCP1664
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