In this application note, a non-isolated, soft-switched, single stage high power factor offline LED driver is introduced. 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. High power factor is achieved by reshaping the peak current near the zero crossing of the input AC line.
| Manufacturer | STMicroelectronics |
|---|---|
| Category | Lighting |
| Sub-Category | LED Drivers - AC / Offline |
| Eval Board |
Board not Stocked
|
| AC Voltage |
115 V
|
| Outputs and Type |
1 Non-Isolated
|
| Current Out |
350 mA
|
| Voltage Out (Max) |
54 V
|
| Efficiency @ Conditions |
>87%, 120V in, 18 LEDs @ 350 mA
|
| Features |
Open Circuit Protection
Over Voltage Protection PFC Short Circuit Protection Under Voltage Protection, Brown-Out |
| Switching Frequency |
200 kHz
|
| Component Count + Extras |
26 + 0
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
Lighting: LED Home Lighting
Lighting: LED Signage |
| Voltage In |
108 ~ 132 VAC
|
| Power Factor | |
| Standard(s) | |
| Main I.C. Base Part |
L6562A
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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