Texas Instruments LM3447 Flyback Controller for LED Lighting Evaluation Module Board LM3447-A19-230VEVM LM3447-A19-230VEVM Datenbogen

Produktcode

LM3447-A19-230VEVM

Test Procedure

Test Procedure

6.1

Line/Load Regulation and Efficiency Measurement Procedure

1. Connect EVM per

above. An external LED load must be used to start up the EVM.

2. Prior to turning on the AC source, set the voltage to 190 V

RMS

3. Turn on the AC source.

4. Record the output voltage and current readings from Voltmeter 2 and output current reading from

Ammeter 2 and input voltage reading from Voltmeter 1 and current from Ammeter 1.

5. Increase output voltage by 5 V

RMS

6. Repeat steps 4 and 5 until 265 V

is reached.

7. Refer to

for shutdown procedure.

6.2

Equipment Shutdown

1. Turn off equipment.

2. Make sure capacitors are discharged.

6.3

EVM Phase Angle Decode vs LED Current

1. Connect EVM per

above. An external LED load must be used to start up the EVM.

2. Prior to turning on the AC source, set the voltage to 230 VRMS.

3. Connect scope probe to EVM per

above to bridge rectifier output.

4. Turn on the AC source.

5. Record the output voltage and current readings from Voltmeter 2 and output current reading from

Ammeter 2 and input voltage reading from Voltmeter 1 and current from Ammeter 1.

6. Set dimmer to minimum setting and vary by 1.0 msec till 8 msec is reached and record in 5 above.

7. Refer to

for shutdown procedure.

NOTE:

The scope must be isolated.

SLUU978 – June 2012

LM3447-A19-230VEVM is a Phase-Dimmable, Primary-Side Regulated LED

Driver