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 2008-2017 Microchip Technology Inc. DS70000323H-page 1

HIGHLIGHTS

This section of the manual contains the following major topics:

1.0 Introduction ....................................................................................................................... 2

2.0 Features............................................................................................................................ 3

3.0 Control Registers .............................................................................................................. 4

4.0 Architecture Overview..................................................................................................... 34

5.0 Module Description ......................................................................................................... 37

6.0 PWM Generator .............................................................................................................. 48

7.0 PWM Triggers ................................................................................................................. 62

8.0 PWM Interrupts............................................................................................................... 69

9.0 PWM Operating Modes................................................................................................... 70

10.0 PWM Fault Pins .............................................................................................................. 75

11.0 Special Features ............................................................................................................. 87

12.0 PWM Output Pin Control................................................................................................. 95

13.0 Immediate Update of PWM Duty Cycle .......................................................................... 98

14.0 Power-Saving Modes...................................................................................................... 99

15.0 External Control of Individual Time Base(s) (Current Reset Mode) .............................. 100

16.0 Application Information ................................................................................................. 101

17.0 PWM Interconnects with Other Peripherals .................................................................. 115

18.0 Related Application Notes............................................................................................. 118

19.0 Revision History............................................................................................................ 119

High-Speed PWM Module

dsPIC33/PIC24 Family Reference Manual

DS70000323H-page 2  2008-2017 Microchip Technology Inc.

1.0 INTRODUCTION

This section describes the High-Speed PWM module and its associated operational modes. The

High-Speed PWM module supports a wide variety of PWM modes and is ideal for power

conversion applications. Some of the common applications that the High-Speed PWM module

supports are:

• AC-to-DC Converters

• Power Factor Correction (PFC)

• Interleaved Power Factor Correction (IPFC)

• Inverters

• DC-to-DC Converters

• Battery Chargers

• Digital Lighting

• Uninterruptable Power Supply (UPS)

• AC and DC Motors

• Resonant Converters

Note: This family reference manual section is meant to serve as a complement to device

data sheets. Depending on the device variant, this manual section may not apply to

all dsPIC33/PIC24 devices.

Please consult the note at the beginning of the “High-Speed PWM” chapter in the

current device data sheet to check whether this document supports the device you

are using.

Device data sheets and family reference manual sections are available for download

from the Microchip Worldwide Web site at: http://www.microchip.com.

 2008-2017 Microchip Technology Inc. DS70000323H-page 3

High-Speed PWM Module

2.0 FEATURES

The High-Speed PWM module consists of the following major features:

• Up to Nine PWM Generators

• Two PWM Outputs per PWM Generator

• Individual Time Base and Duty Cycle Control for Each PWM Output

• Duty Cycle, Dead Time, Phase Shift and a Frequency Resolution of 1.04 ns

• Independent Fault and Current-Limit Inputs for All PWM Outputs

• Redundant Output

• True Independent Output

• Center-Aligned PWM mode

• Output Override Control

• Special Event Trigger

• Prescaler for Input Clock

• Dual Trigger to Analog-to-Digital Converter (ADC) per PWM Period

• PWM

L and PWM

H Output Pin Swapping

• Independent PWM Frequency, Duty Cycle and Phase-shift Changes

• Leading-Edge Blanking (LEB) Functionality

• PWM Capture Functionality

• Up to Two Master Time Bases

• Dead-Time Compensation

• PWM Chopping

• Support for Class B Protection of Fault Control Registers

Note: Duty cycle, dead time, phase shift and frequency resolution is 8.32 ns in Center-Aligned

PWM mode.

 2008-2017 Microchip Technology Inc. DS70000323H-page 5

High-Speed PWM Module

•PHASEx: PWMx Primary Phase-Shift Register

- Provides the phase-shift value for the PWMxH and/or PWMxL outputs if the master

time base is selected

- Provides the Independent Time Base period for the PWMxH and/or PWMxL outputs if

the Independent Time Base is selected

• DTRx: PWMx Dead-Time Register

- Provides the dead-time value for the PWMxH output if positive dead time is selected

- Provides the dead-time value for the PWMxL output if negative dead time is selected

•ALTDTRx: PWMx Alternate Dead-Time Register

- Provides the dead-time value for the PWMxL output if positive dead time is selected

- Provides the dead-time value for the PWMxH output if negative dead time is selected

•SDCx: PWMx Secondary Duty Cycle Register

- Provides the duty cycle value for the PWMxL output if Independent Time Base is

selected

•SPHASEx: PWMx Secondary Phase-Shift Register

- Provides the phase shift for the PWMxL output if the master time base and Independent

Output mode are selected

- Provides the Independent Time Base period value for the PWMxL output if the

Independent Time Base and Independent Output mode are selected

•TRGCONx: PWMx Trigger Control Register

- Enables the PWMx trigger postscaler start event

- Specifies the number of PWM cycles to skip before generating the first trigger

- Enables or disables the primary PWM trigger event with the secondary PWM trigger

event

•IOCONx: PWMx I/O Control Register

- Enables or disables the PWM pin control feature (PWM control or GPIO)

- Controls the PWMxH and PWMxL output polarity

- Controls the PWMxH and PWMxL output if any of the following modes are selected:

• Complementary mode

• Push-Pull mode

• True Independent mode

•FCLCONx: PWMx Fault Current-Limit Control Register

- Selects the current-limit control signal source

- Selects the current-limit polarity

- Enables or disables the Current-Limit mode

- Selects the Fault control signal source

- Configures the Fault polarity

- Enables or disables the Fault mode

•TRIGx: PWMx Primary Trigger Compare Value Register

- Provides the compare value to generate the primary PWM trigger

•STRIGx: PWMx Secondary Trigger Compare Value Register

- Provides the compare value to generate the secondary PWM trigger

•LEBCONx: PWMx Leading-Edge Blanking Control Register (Version 1)

- Selects the rising or falling edge of the PWM output for LEB

- Enables or disables LEB for Fault and current-limit inputs

•LEBCONx: PWMx Leading-Edge Blanking Control Register (Version 2)

- Selects the rising or falling edge of the PWM output for Leading-Edge Blanking (LEB)

- Enables or disables LEB for Fault and current-limit inputs

- Specifies the state of blanking for the Fault input and current-limit signals when the

selected blanking signal (PWMxH, PWMxL or other specified signal by the PWM State

Blank Source Select bits (BLANKSEL<3:0>) in the PWMx Auxiliary Control

(AUXCONx<11:8>) register) is high or low

Termékspecifikációk

Márka:	Microchip
Kategória:	nincs kategorizálva
Modell:	dsPIC33EP32GS202

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