Datasheet > LYT4216

LYT4216

更新时间： 2022-02-26 10:13:02

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		/
页数	文件大小	规格书
20页	2714K
描述
LYTSwitch High Power LED Driver IC Family

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数据手册

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LYT4216 数据手册

LYT4211-4218/4311-4318

Topology

Isolated Flyback

Buck

Tapped Buck

Buck-Boost

Isolation

Efﬁciency

885

Cost

High

Low

Middle

Low

THD

Best

Good

Best

Output Voltage

Any

Yes

925

895

905

Limited

Any

High-Voltage

Table 2.

Performance of Different Topologies in a Typical Non-Dimmable 10 W Low-Line Design.

Typical Circuit Schematic

Key Features

Flyback

Beneﬁts

•ꢀ Provides isolated output

•ꢀ Supports widest range of output voltages

•ꢀ Very good THD performance

Limitations

•ꢀ Flyback transformer

•ꢀ Overall efﬁciency reduced by parasitic capacitance

and inductance in the transformer

CONTROL

•ꢀ Larger PCB area to meet isolation requirements

•ꢀ Requires additional components (primary clamp and bias)

•ꢀ Higher RMS switch and winding currents increases losses

and lowers efﬁciency

Figure 3a. Typical Isolated Flyback Schematic.

Buck

Beneﬁts

•ꢀ Highest efﬁciency

•ꢀ Lowest component count – small size

•ꢀ Simple low-cost power inductor

•ꢀ Low drain source voltage stress

•ꢀ Best EMI/lowest component count for ﬁlter

Limitations

•ꢀ Single input line voltage range

•ꢀ Output voltage <0.6 × V_IN(AC)× 1.41

•ꢀ Output voltage for low THD designs

•ꢀ Non-isolated

LYTSwitch

CONTROL

PI-6841-081512

Figure 3b. Typical Buck Schematic.

Tapped Buck

Beneﬁts

•ꢀ Ideal for low output voltage designs (<20 V)

•ꢀ High efﬁciency

•ꢀ Low component count

•ꢀ Simple low-cost tapped inductor

Limitations

•ꢀ Designs best suited for single input line voltage

•ꢀ Requires additional components (primary clamp)

•ꢀ Non-isolated

LYTSwitch

CONTROL

PI-6842-081512

Figure 3c. Typical Tapped Buck Schematic.

Buck-Boost

Beneﬁts

•ꢀ Ideal for non-isolated high output voltage designs

•ꢀ High efﬁciency

•ꢀ Low component count

•ꢀ Simple common low-cost power inductor can be used

•ꢀ Lowest THD

Limitations

•ꢀ Maximum V_OUTis limited by MOSFET breakdown voltage

•ꢀ Single input line voltage range

•ꢀ Non-isolated

LYTSwitch

CONTROL

PI-6859-081512

Figure 3d. Typical Buck-Boost Schematic.

Rev. B 02/13

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