AN4461 datasheet(10/70 Pages) STMICROELECTRONICS

10 / 70 page

Getting started with STEVAL-ILL066V1 demonstration board

AN4461

10/70

DocID026130 Rev 2

At any power-on of the board, the users shall verify the correct configuration of the board.

The following instructions show a correct initialization of the board:

•

The board input connector is J8 and the input voltage range goes from 96 VAC to 265

VAC (50 Hz or 60 Hz) or 170 VDC to 350 VDC. The user can supply the input from:

–

AC or DC power supply: configure the power supply output to one of the allowed

input values; make sure that the power supply output is OFF and connect the

power supply to J8.

–

Mains: make sure that the mains output is within the allowed range. Connect the

power cable to J8 but do NOT plug the cable into a main socket.

•

Connect the LEDs string to the connector J4. Verify the polarity: the LED string anode

must be connected to “+” pole while the cathode follows the “-” pole. The LED string

forward voltage and current must be within the current board configuration: 100 V (refer

to Section 4.1.4: Transformer output voltage on page 21).

•

Optionally connect the DALI or 0 - 10 V interface.

–

Connect the DALI line to the J3 connector (polarization is not important). Check

with the serial line if this interface is enabling (default when the board is skipped).

–

Connect the 0 - 10 V line to the J9 connector (the interfaces is polarized). Check

with the serial line if this interface is enabling (disabled when the board is

skipped).

•

Connect the serial cable to J2 using the USB TTL serial cable.

•

Turn on the input power and verify that:

–

The RUN-FAULT LED goes on for few seconds before switching off. Should the

RUN-FAULT LED stays ON than an error happened or that a protection is active.

Switch off the board and investigate the problem.

–

The output current starts flowing in the LED string after less than 1 second. At

power on the output current is low (~1% of total output power). The current level

may vary depending on the external interfaces available:

•

If the DALI bus is enabled and active, the output current is set to the “DALI power on

level”.

•

If the 0 - 10 V is enabled the output current defined by the voltage applied on J9.

•

Verify the correct operation by changing the output current using alternatively DALI

commands, 0 - 10 V or the serial command “ll”. Note that the serial “ll” command works

only when the DALI and 0 - 10 are not active.

Should an error be detected (for example, no load condition) the PFC and ZVS stage are

immediately switched off. See Section 9.3.2: st - status on page 49 to debug the error code

retrieved via the “st” command.

AN4461 Datasheet(PDF) 10 Page - STMicroelectronics

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