IXDN0037 datasheet(22/31 Pages) IXYS

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Ballast Demonstrator User Guide

-21

7629A–AVR–04/06

5.3

Lamp_ctrl.c

Th is file exe c u t es L a mp state mach ine a c co rd ing to th e sch ed ule r in the

Main_AT8xEB5114_fluo_demo.c file.

5.3.1

Lamp State Machine

The Lamp state machine functional diagram is shown below:

Figure 5-4.

LAMP state machine

The different states are outlined below:

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 has tried to be started since the user has requested the

switch 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

Let the preheat sequence for LAMP_PREHEAT_TIME.

Then jump to the LAMP_NUMBER_CHECK state.

CONFIGURE_LAMP_PREHEAT

START_IGNITION

LAMP_PREHEAT

LAMP_NUMBER_CHECK

g_lamp_time_multiplier >= LAMP_PREHEAT_TIME_MULTIPLIER

gs_lamp_check_number >= 15

LAMP_OFF

gv_pfc_state==PFC_CONTROL_LOOP

g_inverter_comparison_values.ontime1 <

INVERTER_XXX_LAMP_IGNITION_HALF_PERIOD

IGNITION

Get_i_lamp() >= ONE_LAMP_MINIMUM_IGNITION_CURRENT

&& et_v_lamp() < IGNITION_MAXIMUM_IGNITION_VOLTAGE

RESTART_PREHEAT

gs_lamp_ignition_tries <

LAMP_IGNITION_MAX_TRIES

START_RUN_MODE

g_inverter_comparison_values.ontime1 >=

INVERTER_RUN_HALF_PERIOD

RUN_MODE

g_number_of_lamps > 0

TOO_MANY_LAMP_IGNITION_TRIES

NO_LAMP

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