LYT4211-4218/4311-4318
™
LYTSwitch-4 High Power LED Driver IC Family
Single-Stage Accurate Primary-Side Constant Current (CC) Controller with
PFC for Low-Line Applications with TRIAC Dimming and Non-Dimming Options
Product Highlights
• Better than ±±5 ꢀꢀ regulation
• TRIAꢀ dimmable to less than ±5 output
• Fast start-up
• <2±0 ms at full brightness
• <1s at 105 brightness
• High power factor >0.9
AC
IN
LYTSwitch-4
D
S
V
• Easily meets EN61000-3-2
• Less than 105 THD in optimized designs
• Up to 925 efficient
CONTROL
BP
R
FB
• 132 kHz switching frequency for small magnetics
PI-6800-050913
High Performance, Combined Driver, Controller, Switch
The LYTSwitch-4 family enables off-line LED drivers with high
power factor which easily meet international requirements for
THD and harmonics. Output current is tightly regulated with
better than ±±5 ꢀꢀ tolerance1. Efficiency of up to 925 is easily
achieved in typical applications.
Figure 1. Typical Schematic.
Optimized for Different Applications and Power Levels
Part Number
LYT4211-LYT4218
LYT4311-LYT4318
Input Voltage Range
8±-132 VAꢀ
TRIAC Dimmable
Supports a Wide Selection of TRIAC Dimmers
No
The LYTSwitch-4 family provides excellent turn-on characteristics
for leading-edge and trailing-edge TRIAꢀ dimming applications.
This results in drivers with a wide dimming range and fast
start-up, even when turning on from a low conduction angle –
large dimming ratio and low “pop-on” current.
8±-132 VAꢀ
Yes
Output Power Table1,2
Low Solution Cost and Long Lifetime
Product6
Minimum Output Power3 Maximum Output Power4
LYTSwitch-4 Iꢀs are highly integrated and employ a primary-side
control technique that eliminates the optoisolator and reduces
component count. This allows the use of low-cost single-sided
printed circuit boards. ꢀombining PFꢀ and ꢀꢀ functions into a
single-stage also helps reduce cost and increase efficiency.
The 132 kHz switching frequency permits the use of small,
low-cost magnetics.
LYT4x11E5
2.± W
2.± W
3.8 W
4.± W
±.± W
6.8 W
8.0 W
18 W
12 W
1± W
18 W
22 W
2± W
3± W
±0 W
78 W
LYT4x12E
LYT4x13E
LYT4x14E
LYT4x15E
LYT4x16E
LYT4x17E
LYT4x18E
LED drivers using the LYTSwitch-4 family do not use primary-
side aluminum electrolytic bulk capacitors. This means greatly
extended driver lifetime, especially in bulb and other high
temperature applications.
Table 1. Output Power Table.
Notes:
1. Performance for typical design. See Application Note.
2. ꢀontinuous power in an open-frame design with adequate heat sinking; device
local ambient of 70 °ꢀ. Power level calculated assuming a typical LED string
voltage and efficiency >805.
3. Minimum output power requires ꢀBP = 47 µF.
4. Maximum output power requires ꢀBP = 4.7 µF.
±. LYT4311 ꢀBP = 47 µF, LYT4211 ꢀBP = 4.7 µF.
6. Package: eSIP-7ꢀ (see Figure 2).
eSIP-7ꢀ (E Package)
Figure 2. Package Options.
www.power.com
November 2014
This Product is Covered by Patents and/or Pending Patent Applications.
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
