steval-ill027v2 - STMicroelectronics

STEVAL-ILL027V2
18 W single-stage offline LED driver based on the L6562A
(European version)
Data brief
Features
■
Input voltage 190 Vac to 295 Vac
■
Provides 18 W constant power to HBLED
■
Able to drive 14 to 20 HBLED in series
■
Soft switching
■
LED open-circuit protection
■
LED short-circuit protection
■
Power factor > 0.8
■
Efficiency > 87 %
■
RoHS compliant
STEVAL-ILL027V2
Description
The STEVAL-ILL027V2 implements a nonisolated, soft-switched, single-stage, high power
factor offline LED driver.
The buck-boost converter is chosen for this
application due to its simplicity and low cost.
The converter operates with constant peak
current for constant power control and in transition
mode (boundary mode between CCM and DCM),
to achieve soft switching, using the L6562A
controller.
This single-stage buck-boost converter provides a
cost-effective solution for offline non-isolated LED
applications and it also has open load and shortcircuit protection.
February 2011
Doc ID 18470 Rev 1
For further information contact your local STMicroelectronics sales office.
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Doc ID 18470 Rev 1
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Figure 1.
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Circuit schematic
STEVAL-ILL027V2
Circuit schematic
Circuit schematic
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STEVAL-ILL027V2
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
10-Feb-2011
1
Changes
Initial release.
Doc ID 18470 Rev 1
3/4
STEVAL-ILL027V2
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