Microchip Technology MA330020 Data Sheet

 2008-2014 Microchip Technology Inc.

DS70000318G-page 197

The high-speed PWM module on the
dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/
X04 devices supports a wide variety of PWM modes
and output formats. This PWM module is ideal for
power conversion applications, such as:

• AC/DC Converters

• DC/DC Converters

• Power Factor Correction (PFC)

• Uninterruptible Power Supply (UPS)

• Inverters

• Battery Chargers

• Digital Lighting

The high-speed PWM module incorporates the
following features:

• 2-4 PWM generators with 4-8 outputs

• Individual time base and duty cycle for each of the 

eight PWM outputs

• Dead time for rising and falling edges:

• Duty cycle resolution of 1.04 ns

• Dead-time resolution of 1.04 ns

• Phase-shift resolution of 1.04 ns

• Frequency resolution of 1.04 ns

• PWM modes supported:

- Standard Edge-Aligned
- True Independent Output
- Complementary
- Center-Aligned
- Push-Pull
- Multiphase
- Variable Phase
- Fixed Off-Time
- Current Reset
- Current-Limit

• Independent Fault/Current-Limit inputs for each of 

the eight PWM outputs

• Output override control

• Special Event Trigger

• PWM capture feature

• Prescaler for input clock

• Dual trigger from PWM to ADC

• PWMxH, PWMxL output pin swapping

• PWM4H, PWM4L pins remappable

• On-the-fly PWM frequency, duty cycle and 

phase-shift changes

• Disabling of Individual PWM generators to reduce 

power consumption

• Leading-Edge Blanking (LEB) functionality

 conceptualizes the PWM module in a

simplified block diagram. 

 illustrates how

the module hardware is partitioned for each PWM
output pair for the Complementary PWM mode. Each
functional unit of the PWM module is discussed in
subsequent sections.

The PWM module contains four PWM generators. The
module has up to eight PWM output pins: PWM1H,
PWM1L, PWM2H, PWM2L, PWM3H, PWM3L,
PWM4H and PWM4L. For complementary outputs,
these eight I/O pins are grouped into H/L pairs. 

Note 1: This data sheet summarizes the fea-

tures of the dsPIC33FJ06GS101/X02
and dsPIC33FJ16GSX02/X04 families
of devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to “High- Speed PWM”
(DS70323) in the “dsPIC33F/PIC24H
Family Reference Manual”, which is
available on the Microchip web site
(

www.microchip.com

).

2: Some registers and associated bits

described in this section may not be
available on all devices. Refer to

 in

this data sheet for device-specific register
and bit information.

Duty cycle, dead time, phase shift and
frequency resolution is 8.32 ns in
Center-Aligned PWM mode.