IXDN0036 datasheet(30/41 Pages) IXYS

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ATPWMx Demonstrator Software

ATAVRFBKIT / EVLD001 User Guide

6-31

7597A–AVR–02/06

LAMP_OFF

Nothing happens, the exiting of this state takes place as soon as the gv_pfc_state is set

to PFC_CONTROL_LOOP.

CONFIGURE_LAMP_PREHEAT

This is the first time the lamp is attempted to be started once the user has requested to

switch it on.

Configure the amplifier0, which is used to measure the current, then configure the PSC2

according to the definitions in the config.h file, and initialize all the lamp control

variables.

Then jump to the LAMP_PREHEAT state.

LAMP_PREHEAT

Starts the preheat sequence for LAMP_PREHEAT_TIME.

Then jump to the LAMP_NUMBER_CHECK state.

LAMP_NUMBER_CHECK

Check the preheat current in order to know whether there is one or two lamps

Then jump to the START_IGNITION state.

In the case there is no lamp, jump to the NO_LAMP state.

START_IGNITION

Dec r ea se

th e

fr equ en cy

fro m

th e

init

fr eq ue ncy

d o wn

t o

INVERTER_IGNITION_HALF_PERIOD.

Then jump to the IGNITION state.

IGNITION

The ignition sequence consists of maintaining the ignition frequency determined by

INVERTER_IGNITION_HALF_PERIOD for 10ms, and then checking if ignition occurs

by measuring lamp current and voltage.

In case it is... START_RUN_MODE.

In case it isn’t... RESTART_PREHEAT.

RESTART_PREHEAT

Reconfigure the Inverter with the Restart parameters, then go to LAMP_PREHEAT.

If Ignition fails too many times... Go to TOO_MANY_LAMP_IGNITION_TRIES.

START_RUN_MODE

Increase the frequency from the init frequency, INVERTER_IGNITION_HALF_PERIOD.

Then jump to the RUN_MODE state.

IXDN0036 데이터시트(PDF) 30 Page - IXYS Corporation

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