PIC12F615 datasheet(7/20 Pages) MICROCHIP

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LED Lighting Solutions Design Guide

LED Lighting Solutions

Adding Intelligence – PIC10F Solutions

LED lighting applications can benefit from the intelligence of

a MCU. The MCU can be used for a variety of tasks, including

the user interface, communication, battery status monitoring

and temperature measurement.

The addition of a MCU to a design does not have to be

complicated, space consuming, or expensive. Microchip offers the

PIC10F family of MCUs with devices that have 6 pins in a space

saving SOT-23 or 2 x 3 mm DFN style package. The oscillator and

reset circuitry are inside the device. Connect power, ground, and

you get four I/O pins that can be programmed to do anything you

want. It’s as simple as that.

The PIC10F pins can be used as analog or digital pins. Two

devices in the PIC10F family have analog comparator modules.

Two PIC10F devices are available with an 8-bit analog to digital

converter (ADC). There are only 33 assembly instructions to learn

in order to write code for the PIC10F. There are also C compilers

are available for the PIC10F family, if you prefer to write in a

high-level language.

PIC10F 6-Pin Microcontroller Family

Device

Flash Program Memory

Words

Data

RAM Bytes

8-Bit

Timer

Analog Comparator

Module

8-bit

ADC Module

PIC10F200

256

Yes

–

PIC10F202

512

Yes

–

PIC10F204

256

Yes

–

PIC10F206

512

Yes

–

PIC10F220

256

Yes

–

Yes

PIC10F222

512

Yes

–

Yes

Provide Simple Dimming Control

One application for a MCU in LED lighting is brightness

control. A power LED can be dimmed by reducing the drive

current. However, this is not the most efficient way to

control the brightness of a LED. A power LED provides the

best efficiency at the maximum rated drive current. Better

efficiency can be obtained by turning the LED on and off

using a low frequency PWM signal. The PWM signal is

connected to the enable input of the SMPS control IC. The

LED is always driven at the maximum current level when it is

on.

The MCP1650 Multiple White LED Demo Board and the

MCP1650 3W White LED Demo Board both take advantage

of the 6-pin PIC10F206 MCU (see pages 5-7 for more

information). The PIC10F206 device provides the user button

interface and generates the PWM control signal for the

SMPS IC. The PIC10F206 has an internal oscillator and reset

circuit, so no external circuitry is required. The PIC10F206

device could also be used to linearize the brightness control

or monitor battery status in these applications.

Shown approximate size.

Package Comparison

SOT-23 vs. MSOP and SOIC

6-SOT (OT)

3 x 3 mm

PIC10F2XX

8-MSOP (MS)

3 x 5 mm

8-SOIC (SN)

5 x 6 mm

8-TDFN

(MC/MNY)

2 x 3 mm

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