EVL6562A-LED STMicroelectronics, EVL6562A-LED Datasheet - Page 21

• Manufacturer Part Number: EVL6562A-LED
• Description: EVALUATION MODULE L6562A
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6562A-LED

• Current - Output / Channel: 350mA
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 48V
• Utilized Ic / Part: L6562A
• Input Voltage: 48 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6562A
• Other names: 497-10420

AN2983
2.7
Figure 19. Dimming 90%
CH(4) green: LED current [mA]
CH(1) red: gate drive output [V]
CH(3) purple: D_Dimm input [V]
Auxiliary power
The components for the auxiliary power supply are Q1, D2, C2, R2, R3, and R5.
This section is included as a commodity to reduce the main voltage (48 V nominal) to the
18 V required from the Vcc input of the L6562A controller, thus avoiding the use of another
power supply. It has been designed to work with input voltages in the range of 33 to 65 V, but
can be easily resized for different ranges.
Note that it is a linear regulator and that its efficiency is not very good. For this reason, in
real applications where multiple modules are employed, it is better to consider a solution
with an external supply common to all the modules.
Simply removing R2 and R5 disconnects the entire block and allows the power supply (Vcc)
to be provided from pin 5 of the header connector.
Figure 21. Auxiliary power
Doc ID 15679 Rev 1
Figure 20. Dimming 99%
CH(4) green: LED current [mA]
CH(1) red: gate drive output [V]
CH(3) purple: D_Dimm input [V]
Circuit description
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