U2008B-XY Просмотр технического описания (PDF) - Atmel Corporation

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U2008B-XY

Low-cost Phase-control IC with Soft Start

Atmel Corporation 

Figure 1-2. Block Diagram with Typical Circuit: Soft Start

230 V ~

22 kΩ/2W

BYT51K

L

Load

R2

680 kΩ

R1

D1

αmax

R8

470 kΩ

7

6

Limiting

detector

Voltage

detector

Mains voltage

compensation

Automatic

retriggering

U2008B

TIC

226

R3

8

180Ω

1

Current

detector

Full wave load

current detector

Soft start

C5

Soft start

4.7 µF/25V

Phase

control unit

ϕ = f(V3)

2

3

C3

10 nF

C4

100 nF

-

+

Supply

voltage

limiting

Reference

voltage

Voltage

monitoring

5

-VS

C1

100 µF

25V

4 GND

R10 68 kΩ

Set point

R7

220 kΩ

P1

50 kΩ

N

2 U2008B

4712C–AUTO–07/07

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