LYTSwitch-6 Family
Flyback CV/CC LED Driver IC with Integrated
650 V / 725 V MOSFET and FluxLink Feedback
Product Highlights
Highly Integrated, Compact Footprint
• Up to 94% efficiency across full load range
Sꢄ FET
• Incorporates a multi-mode Quasi-Resonant (QR) / CCM / DCM flyback
controller, 650 V or 725 V MOSFET, secondary-side control and
synchronous rectification driver
• Integrated FluxLink™, HIPOT-isolated, feedback link
• Exceptional CV/CC accuracy, independent of transformer design or
external components
D
S
V
LYTSwitch-6
• Adjustable accurate output current sense using external sense resistor
Optional
Current
Sense
VOUT
Priꢅary FET
and Controller
EcoSmart™ – Energy Efficient
BPP
IS
Secondary
Control IC
• Less than 15 mW no-load including line sense (without PF front end)
• Designs using LYTSwitch-6 easily meet Energy Star and all global
lighting energy efficiency regulations
PIꢀꢁꢂ75ꢀ072ꢁꢃ7
• Low heat dissipation
Figure 1. Typical Application/Performance.
Advanced Protection / Safety Features
• Input line OV with auto-restart
• Output fault OVP/UVP with auto-restart
• Open SR FET gate detection
• Input voltage monitor with accurate brown-in
• Thermal foldback ensures that power continues to be delivered
(lower level) at elevated temperatures
Full Safety and Regulatory Compliance
• Reinforced insulation
• Isolation voltage >4000 VAC
Figure 2. High Creepage, Safety-Compliant InSOP-24D Package.
• 100% production HIPOT compliance testing
• UL1577 and TUV (EN60950) safety approved
Green Package
Output Power Table
• Halogen free and RoHS compliant
380 VDC /
450 VDC2
Applications
277 VAC ± 15% 85-305 VAC
Product3
• Isolated off-line LED driver
• Smart LED lighting
Open Frame1 Open Frame1 Open Frame1
• High-voltage flyback post regulator
LYT6063C/6073C
LYT6065C/6075C
LYT6067C/6077C
LYT6068C
15 W
30 W
50 W
65 W
12 W
25 W
45 W
55 W
25 W
40 W
60 W
Description
The LYTSwitch™-6 series family of ICs dramatically simplifies the
development and manufacturing of off-line LED drivers, particularly
those in compact enclosures or with high efficiency requirements.
The LYTSwitch-6 architecture is revolutionary in that the devices
incorporate both primary and secondary controllers, with sense
elements and a safety-rated feedback mechanism into a single IC.
Table 1. Output Power Table.
Notes:
1. Minimum continuous power in a typical non-ventilated and PCB size measured
at 40 °C ambient. Max output power is dependent on the design. With
condition that package temperature must be < 125 °C.
2. With 725 V FET only.
Close component proximity and innovative use of the integrated
communication link, FluxLink, permit accurate control of a secondary-
side synchronous rectification MOSFET with Quasi-Resonant switching
of primary integrated high-voltage MOSFET to maintain high efficiency
across the entire load range.
3. Package: InSOP-24D.
www.power.com
June 2018
This Product is Covered by Patents and/or Pending Patent Applications.
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