U2008B-X 查看數據表（PDF） - Atmel Corporation

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U2008B-X

Low-Cost Phase-Control IC with Soft Start

Atmel Corporation 

Features

• Full Wave Current Sensing

• Compensated Mains Supply Variations

• Variable Soft Start or Load-current Sensing

• Voltage and Current Synchronization

• Switchable Automatic Retriggering

• Triggering Pulse Typically 125 mA

• Internal Supply-voltage Monitoring

• Current Requirement ≤ 3 mA

Applications

• Low-cost Motor Control

• Domestic Appliance

1. Description

The U2008B is designed as a phase-control circuit in bipolar technology. It enables

load-current detection as well as mains-compensated phase control. Motor control

with load-current feedback and overload protection are preferred applications.

Figure 1-1. Block Diagram with Typical Circuit: Load Current Sensing

230 V ~

Load

22 kΩ/2W

BYT51K

R2

330 kΩ

R1 D1

αmax

R8

1 MΩ

7

6

Limiting

detector

Voltage

detector

Mains voltage

compensation

Low-cost

Phase-control

IC with Soft

Start

U2008B

Automatic

retriggering

TIC

226

Current

detector

R3

8

180Ω

Full wave load

1

current

detector

Soft start

Phase

control unit

ϕ = f(V3)

2

3

^

R6

V(R6) = ±250 mV

C3

3.3 nF

C4

100 nF

U2008B

+-

5

-VS

Supply

voltage

limiting

C1

22 µF/

25 V

4 GND

Reference

voltage

Voltage

monitoring

R14

47 kΩ

R10 100 kΩ

Set point

P1

Load current

compensation

R7

4712C–AUTO–07/07

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