DSPIC33FJ12MC02ESS datasheet(145/284 Pages) MICROCHIP

145 / 284 page

Preliminary

DS70265B-page 143

dsPIC33FJ12MC201/202

14.0 MOTOR CONTROL PWM

MODULE

The dsPIC33FJ12MC201/202 device supports up to

two dedicated Pulse Width Modulation (PWM)

modules. The PWM1 module is a 6-channel PWM

generator, and the PWM2 module is a 2-channel PWM

generator.

The PWM module has the following features:

• Up to 16-bit resolution

• On-the-fly PWM frequency changes

• Edge and Center-Aligned Output modes

• Single Pulse Generation mode

• Interrupt support for asymmetrical updates in

Center-Aligned mode

• Output override control for Electrically

Commutative Motor (ECM) operation or BLDC

• Special Event comparator for scheduling other

peripheral events

• Fault pins to optionally drive each of the PWM

output pins to a defined state

• Duty cycle updates configurable to be immediate

or synchronized to the PWM time base

14.1

PWM1: 6-Channel PWM Module

This module simplifies the task of generating multiple

synchronized PWM outputs. The following power and

motion control applications are supported by the PWM

module:

• 3-Phase AC Induction Motor

• Switched Reluctance (SR) Motor

• Brushless DC (BLDC) Motor

• Uninterruptible Power Supply (UPS)

This module contains three duty cycle generators,

numbered 1 through 3. The module has six PWM

output pins, numbered PWM1H1/PWM1L1 through

PWM1H3/PWM1L3. The six I/O pins are grouped into

high/low numbered pairs, denoted by the suffix H or L,

respectively. For complementary loads, the low PWM

pins are always the complement of the corresponding

high I/O pin.

14.2

PWM2: 2-Channel PWM Module

This

module

provides

additional

pair

complimentary PWM outputs that can be used for:

• Independent PFC correction in a motor system

• Induction cooking

This module contains a duty cycle generator that

provides two PWM outputs, numbered PWM2H1/

PWM2L1.

Note:

This data sheet summarizes the features

of the dsPIC33FJ12MC201/202 devices.

It is not intended to be a comprehensive

reference source. To complement the

information in this data sheet, refer to the

“dsPIC33F Family Reference Manual”.

Please see the Microchip web site

(www.microchip.com)

for

the

latest

dsPIC33F Family Reference Manual

chapters.

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