Mikroelektronika d.o.o.
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Carte à clic pour pilote LED
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Le LED Driver Click Board™ est basé sur le driver de tension élévateur haute tension MCP1662 de Microchip. Le Click Board™ est conçu pour fonctionner sur une alimentation 3,3 V ou 5 V. Il communique avec le microcontrôleur cible via la broche PWM de la ligne MikroBUS.
The LED Driver Click Board™ carries the MCP1662 high-voltage step-up voltage driver from Microchip. The LED Driver Click Board™ is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over PWM pin on the mikroBUS™ line.
MCP1662 MCU FEATURES
The MCP1662 device is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive LED strings with a constant current from a two- or three-cell alkaline or lithium Energizer®, or NiMH/NiCd, or one-cell Lithium-Ion or Li-Polymer batteries.
The device integrates a 36V, 800 mW low-side switch, which is protected by the 1.3A cycle-by-cycle inductor peak current limit operation.
How Does The LED Driver Click Board™ Work?
The LED Driver Click Board™ has a power input and a PWM input, so the LED lights can be dimmed. It's a great choice for driving LED strips.
SPECIFICATIONS
| Type | LED Drivers |
| Applications | LED strings with a constant current from a two- or three-cell alkaline or lithium Energizer®, or NiMH/NiCd, or one-cell Lithium-Ion or Li-Polymer batteries |
| On-board modules | MCP1662 High-Voltage Step-Up LED Driver |
| Key Features | Open Load Protection, Overtemperature Protection, Input Voltage Range: 2.4V to 5.5V |
| Interface | PWM |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout on the LED Driver 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 | 100 | mA | ||
| Max Out Current 3.3V Vin 4 LEDs | 125 | mA | ||
| Max Out Current 5.0V Vin 4 LEDs | 200 | mA |
Software Support
Code examples for the LED Driver Click Board™, written for MikroElektronika hardware and compilers are available on Libstock.
CODE SNIPPET
The following code snippet shows the LED driver click example, which initializes ADC and PWM and sets the PWM output depending on the potentiometer analog input.
01 void systemInit()
02 {
03 TRISC = 0; // designate PORTC pins as output
04 LATC = 0; // set PORTC to 0
05 PWM2_Init( 5000 ); // Initialize PWM2 module at 5KHz
06 }
07
08 void main()
09 {
10 systemInit();
11 currentDuty = 0;
12 PWM2_Start();
13 PWM2_Set_Duty(currentDuty);
14
15 while ( 1 ) // Playing with Potentiometer P1 you can control current PWM duty cycle
16 {
17 currentDuty = ADC_Read(1) & 0x0000FFFF; // Read 10 - bit ADC value and set newly acquired 8 - bit PWM duty
18 currentDuty = currentDuty / 4;
19 PWM2_Set_Duty(currentDuty ); // Set newly acquired duty
20 }
21
22 }
Carte à clic pour pilote LED
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