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LYTSwitch-5

Description
Single-Stage LED Driver IC with Combined PFC and Constant Current Output in Isolated and Non-Isolated Topologies
File Size832KB,14 Pages
ManufacturerPower Integrations
Websitehttps://www.powerint.cn
Download Datasheet View All

LYTSwitch-5 Overview

Single-Stage LED Driver IC with Combined PFC and Constant Current Output in Isolated and Non-Isolated Topologies

LYT5216-5228
LYTSwitch-5
Family
Single-Stage LED Driver IC with Combined PFC and Constant Current
Output in Isolated and Non-Isolated Topologies
Product Highlights
Combined Single-Stage PFC + Accurate CC Output
Accurate CC, better than ±3%
Power Factor >0.9
Low THD, <10% with typical input and output conditions
>90% efficient in optimized designs
High switching frequency and DCM allow compact magnetics
LYTSwitch-5
DS
DO
FB
L
D
Design Flexibility
CONTROL
Supports buck, buck-boost, tapped-buck, boost, isolated and
BP
OC
S
non-isolated flyback topologies
2 MOSFET voltage options and 3 power levels for optimum device
selection
PI-7711-121015
Highest Reliability
Figure 1a. Typical Application Schematic: Isolated Flyback.
No electrolytic bulk capacitors or optoisolators for increased lifetime
Comprehensive protection features
Input and output overvoltage
Open-loop protection
Advanced thermal control
Thermal foldback allows output light delivery at abnormally high
ambient temperatures
Hysteretic shutdown provides protection during fault conditions
Description
The LYTSwitch™-5 family is ideal for single-stage power
factor
corrected constant current LED applications – bulbs, tubes and
ballasts.
Each device incorporates a high-voltage power MOSFET and discon-
tinuous mode, variable frequency, variable on-time controller. The
controller also provides fast (cycle-by-cycle) current limit, input and
output OVP, plus advanced thermal management circuitry.
The combination of a low-side switching topology, cooling via electroni-
cally quiet SOURCE pins and frequency jitter ensures extremely low EMI.
This reduces the size of the input filter components – greatly reducing
audible noise.
The part numbers shown in Table 1 describe 3 different power levels and
two MOSFET voltage options to cost-optimize designs, while EcoSmart™
switching technology ensures maximum efficiency for each device size
and load condition.
LYTSwitch-5
DS
DO
FB
L
D
CONTROL
BP
OC
S
PI-7799-121015
Figure 1b. Typical Application Schematic: Non-Isolated Buck.
Output Power Table
Product
2
LYT5225D
LYT5216D, LYT5226D
LYT5218D, LYT5228D
Output Power
1
90-308 VAC
9W
16 W
25 W
Table 1. Output Power Table.
Notes:
1. Maximum practical continuous power in an open frame design with adequate
heat sinking, measured at 50˚C ambient (see Key Applications Considerations
for more information).
2. Package: D: SO-16B.
Figure 2.
SO-16B (D Package).
www.power.com
March 2016
This Product is Covered by Patents and/or Pending Patent Applications.
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