Confidential
15
29/08/2016
•
After setup, the LED current programming procedure is actually entered when,
powering up the system, the button S3 is kept pressed. Details on the procedure are
reported below.
1. When entering programming procedure, the LED DS1 will start blinking. Release
button S3. Before driving current into the LED strings, the microcontroller will wait that
the user brings the trimmers P1 and P2 (current setting knobs) to the left most
position (counter-clock-wise) to preselect the minimum current level: whenever this
position is attained, the LDM will drive currents in both LED strings. At any time, the
sequence can be exited without save by pressing
“S
2
”
;
2. Adjust the current in the LEDs. The right setting can be found by human visual
perception such as lighting of a dark room (never look directly in the LED source to
potential avoid health hazard or dazzling!), light intensity measurement, a current
measurement probe, or series multimeter in current sensing mode;
3. Once the desired current is found, new settings are save by pressing
“S
1
”
;
4. As an alternative, original factory settings can always be restored with
the“S
3
”
button.
Please note that any LED string between 2V and 60V can be used. The firmware will limit
the current so that 10W maximum per channel can be delivered.
NCV78763 LDM A REF DES KIT: APRGM – Procedure #1
Summary of Contents for NCV78763 LDM A REFERENCE DESIGN KIT
Page 2: ...Confidential 2 29 08 2016 NCV78763 LDM A v1 1 Quick Start Guide KIT OVERVIEW...
Page 6: ...Confidential 6 29 08 2016 NCV78763 LDM A v1 1 Quick Start Guide HW SETUP...
Page 17: ...Confidential 17 29 08 2016 NCV78763 LDM A v1 1 System Overview Design...
Page 20: ...Confidential 20 29 08 2016 NCV78763 LDM A REF DES sub circuit B reverse battery...
Page 21: ...Confidential 21 29 08 2016 NCV78763 LDM A REF DES sub circuit C MCU interface...
Page 22: ...Confidential 22 29 08 2016 NCV78763 LDM A REF DES sub circuit D MCU...
Page 23: ...Confidential 23 29 08 2016 NCV78763 LDM A REF DES sub circuit E NCV78763...
Page 24: ...Confidential 24 29 08 2016 NCV78763 LDM A REF DES PCB top side...
Page 25: ...Confidential 25 29 08 2016 NCV78763 LDM A v1 1 System Overview Measurement Report...
Page 27: ...Confidential 27 29 08 2016 System steady state stability low VBAT 7V...
Page 28: ...Confidential 28 29 08 2016 System steady state stability nom VBAT 13V...
Page 29: ...Confidential 29 29 08 2016 System steady state stability nom VBAT 19V...
