Part Number: MCP1630DM-LED2 Devices Supported: MCP1630V, PIC12F683, MCP1702
The MCP1630 Boost Mode LED Driver Demo Board is a step-up, switch-mode, dc-dc converter used for power LED applications. The demo board provides a 350 mA or 700 mA constant current source with a jumper selection. The input operating voltage range is 9VDC – 16VDC and the board can supply up to 30W to a string of power LEDs.
PCB with 5 LEDs provide for evaluation
Compact size with high output power
High efficiency over entire operating input voltage range
Selectable 350 mA or 700 mA output current
Up to 30W output power
Optional software dimming control
500 kHz switching frequency can be changed in firmware
Additional application functions can be provided in firmware
For operation with supplied LEDs, Microchip's 9V, 700 mA power supply P/N AC162039 or equivalent is required
For operation at full rated power, a 12V, 3A power supply is recommended
Part Number: MCP1650DM-LED1 Devices Supported: MCP1650, MCP1651
The MCP1650 3W White LED Demo Board demonstrates Microchip’s MCP165X Boost Controller product family in a battery powered white LED application. The MCP1651 (8-pin MSOP) with low battery detect is featured in a SEPIC converter topology with an input voltage range of 2.0V to 4.5V.
MCP1651 in a SEPIC application configured in Bootstrap mode. This application circuit regulates the output to 3.6V while delivering 700mA of current as the input voltage varies from 2.0V to 4.5V
Dimming and flashing modes are provided by a PIC10F206 microcontroller
Program connector allows access to the PIC10F206 program code via Microchip’s ICD 2 In-Circuit Debugger
Part Number: MCP1252DM-BKLT Devices Supported: MCP1252
The MCP1252 Charge Pump Backlight LED Demo Board demonstrates the use of a Charge Pump device in an LED application. The board also serves as a platform to evaluate the MCP1252 device in general. The MCP1252-ADJ is an excellent choice for biasing the back lighting or driving other LED applications. Light intensity is controlled uniformly through the use of ballast resistors. The peak intensity is set by the feedback to the MCP1252-ADJ. Dimming is accomplished by pulse-width modulating the shutdown pin of the device.
The board also feature a PIC10F206 microcontroller in a SOT23 package, which is used to provide an enable signal to the MCP1252. The PICmicro also accepts a push-button input that allows the user to adjust the white LEDs to five different light intensities, in addition to placing the system in a standby mode that consumes less than 1 uA of current (typical).
Programmed MCP1252 Charge Pump control (via the PIC10F206)
Four white LEDs
Enables the MCP1252 Charge pump
Controls light intensity
Places system into sleep mode (< 1 uA)
Push-button interface for multiple control options
Baseline Flash Microcontroller Programmer (BFMP) Header for reprogramming the PIC10F206
MCP1631HV Digitally Controlled Programmable Current Source Reference Design
Part Number: MCP1631RD-DCPC1 Devices Supported: MCP1631HV, PIC16F616
The MCP1631HV Digitally Controlled Programmable Current Source Reference Design is used to drive and dim one or more power LEDs in a series or parallel topology (depending on the LED’s capability). The reference design may also be used to charge one to four cell NiMH/NiCd or one to two cell Li-Ion battery packs. The board uses the MCP1631HV high-speed analog PWM controller and PIC16F616 microcontroller to generate the proper dimming ratio for LEDs or charge algorithm for NiMH, NiCd and Li-Ion batteries. The boards is used to evaluate Microchip’s MCP1631HV in a SEPIC power converter application.
Input Operating Voltage Range: +3.5V to +16V
Firmware default output current of 700 mA with dimming ratio 10:1 (70 mA/step)
Maximum output current of 1000 mA
Maximum output power of 8.5W
Drive one or more LEDs
Firmware for charging Li-Ion, NiMH, and NiCd batteries
Single ON/OFF/Dimming switch
Status and fault indication
Hardware and software overvoltage protection (OVP) set to 9.0V. The software value can be modified in the source code to be less than 9.0V
LED lighting designers are being challenged to meet the rapidly expanding demand for green, smart energy technologies while differentiating their products. Microchip’s Digital LED Lighting Development Kit (DM330014) enables designers to quickly leverage the capabilities and performance of the dsPIC33 ‘GS’ series of Digital Signal Controllers (DSCs), to develop LED lighting products. The dsPIC33 ‘GS’ DSC and this reference design allow developers to create a 100% digitally controlled ballast function, while including advanced features such as dimming and color hue control. The dsPIC33 ‘GS’ DSCs can support an entire system implementation for LED lighting products, including power-conversion circuits, such as AC-to-DC and DC-to-DC conversion, along with functions such as Power Factor Correction (PFC), which are necessary for a complete product and lower the overall system cost.
Benefits offered by the digital-power techniques in this reference design and the dsPIC33 ‘GS’ series of DSCs include:
Color control for RGB LEDs
Supports DMX512 Standard for brightness control
Flexible input voltage support, including both Buck and Boost topologies
Full digital control
Fully controlled with a single dsPIC33FJ16GS504 DSC
Reduced System Cost via higher integration
Higher Efficiency using digital-control techniques
The Ambient Lighting Module Reference Design offers a compact solution to control a RGB (Red, Green, Blue) LED over a LIN network. A RGB LED module can be used for illumination, backlighting or indication in a vehicle.
This reference design uses a low end 8-bit microcontroller to implement:
RGB LED color mixing (16,383 colors) and intensity (1023 levels)
A LIN Protocol module allowing for intersystem communication within the door module as well as the main body controller.
The kit contains 4 modules, which can also be used in conjunction with the APGDT001 LIN Serial Analyzer to quickly create a working LIN network straight out of the box.