Datasheet

Automotive Applications Design Guide 7
A typical LED solution can be as simple as a battery and
a resistor, but with more complex dimming, flashing and
multi-color applications; and more rigorous requirements
in terms of matching brightness and color, there is an
increasing need to control and monitor the current in an
LED application.
Solutions for LED Applications
Traditional incandescent lamps are increasingly being
replaced by Light Emitting Diodes (LEDs). LEDs offer
compelling advantages, including a high level of light
efficiency, reliability, mechanical stability and long
operating lifetime. Because LEDs must be operated at
constant current, DC-DC converters with the capability of
efficiently translating the operating voltage into the LED
forward voltage are required. Further key elements of LED
control circuits are overcurrent protection, over heating
protection (temperature sensing) and efficient energy
utilization.
Application Examples
 Dashboard Illumination
 Signal and Warning Lights
 Daytime Running Lights
 Interior Lighting
 Tail Light
 Head up Displays
 Infrared Cameras
Multiple White LED Solutions
8/16-bit PIC
®
Microcontroller
16-bit dsPIC
®
DSC
Switching
Regulator
Boost
Controller
Development Tools
Part Number Product
DV164101 PICkit™ 1 Flash Starter Kit
AC163002 PICDEM™ MSC1 Infrared (IR) Driver Daughter Board
MCP1650DM-LED1 MCP1650 3W White LED Demonstration Board
MCP1650DM-LED2 MCP1650 Multiple White LED Demonstration Board
MCP6SX2DM-PCTLPD MCP6SX2 PGA Photodiode PICtail™ Demonstration Board
MCP1252DM-BKLT MCP1252 Charge Pump Backlight Demonstration Board
LOW-POWER ANALOG SOLUTIONS FOR AUTOMOTIVE APPLICATIONS
Recommended Product Families for LED Applications
Family Features Device Examples
Switching Regulators Step-up and step-down DC-DC converters w/soft start, programmable
voltage/current supply, point-of-load sequencing, intelligent temperature
compensation, overvoltage and overcurrent handling
MCP1252/3, MCP1601, MCP1612,
MCP1650/1/2/3, TC105, TC120/5/6
Pulse Width Modulator High-speed microcontroller adaptable PWM; excellent current mode
controller, fast response time, provides a very tight limit to the maximum
switch current over a wide range of input voltages, low quiescent current
MCP1630
Temperature Sensors Typical Accuracy: ±0.5°C, ±1.0°C; Output Options: 1) digital ouputs,
2) analog outputs, 3) serial outputs: SMBus/I
2
C™, SPI
TC6501/2/3/4, MCP9700/1/A,
MCP9800/1/2/3/5, TC72/4/5/7
Op Amps Single, dual and quad op amps, low quiescent current (600 nA), lowest
IQ for a given Gain Bandwidth Product (GBWP); offered in space-saving
packages
MCP6041/2/3/4, MCP6141/2/3/4,
MCP601/2/3/4/6/7/8/9,
MCP6021/2/3/4
Microcontrollers Wide range of 8/16- RISC-based microcontrollers and digital signal
controllers
PIC12, PIC16, PIC18, PIC24, dsPIC30,
dsPIC33