IXDN0036 datasheet(28/41 Pages) IXYS

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ATPWMx Demonstrator Software

ATAVRFBKIT / EVLD001 User Guide

6-29

7597A–AVR–02/06

PFC_DELAY_FOR_NEXT_PFC_SOFT_START

case

the

s o ft

s tart

fail s,

the

software

has

w a it

DELAY_FOR_NEXT_PFC_SOFT_START*DELAY_MULTIPLIER_FOR_NEXT_PFC_S

OFT_START,

before trying a new soft start by going back to the START_PFC_SOFT_START state.

START_PFC_CONTROL_LOOP

A zero crossing detection occurs so the PFC is now started, and the PFC can be config-

ured to autoretrigg mode.

The power will then be sufficient to set the microcontroller at its nominal speed on the

next SET_MICROCONTROLLER_NOMINAL_SPEED state.

SET_MICROCONTROLLER_NOMINAL_SPEED

The PFC is now running, so the microcontroller can now run at its full speed and the

lamp can be switched on.

Then the gv_pfc_state is set to PFC_CONTROL_LOOP. This directly impacts the lamp

state

m a ch in e

which

g o e s

fr o m

LAM P_OFF

state

CONFIGURE_LAMP_PREHEAT state.

PFC_CONTROL_LOOP

PFC is now running... This is the normal PFC loop control.

In the case g_v_request_lamp_off is equal to 1 during a V_LAMP or an I_LAMP state of

the ADC state machine, the PFC will be shut down and the microcontrollers speed will

be d e cr ea sed in or de r t o r e d u ce p o we r con s um ptio n in t he ne w

SHUT_DOWN_PFC_AND_SLOW_DOWN_UC_SPEED state.

SHUT_DOWN_PFC_AND_SLOW_DOWN_UC_SPEED

Switch off the PFC.

Switch the microcontroller to a low power consumption mode.

Then go back to PFC_OFF state.

6.2.2

PFC State Machine

Global variables

6.2.2.1

Input variables

which have an

impact on PFC state

machine:

• gv_pfc_state is set from PFC_OFF state to INIT_PFC_HAVERSINE_CHECK state

on the Control state machine in Main_pwmx_fluo_demo.c file when the user

requests to switch the lamp on.

• gv_pfc_state is also set from PFC_CONTROL_LOOP state to

SHUT_DOWN_PFC_AND_SLOW_DOWN_UC_SPEED state on the Control state

machine in Main_pwmx_fluo_demo.c file when the user requests to switch the lamp

off.

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