Datasheet > U2008B_07

U2008B_07

更新时间： 2022-12-19 07:16:15

品牌	Logo	应用领域
爱特美尔 - ATMEL		软启动
页数	文件大小	规格书
13页	332K
描述
Low-cost Phase-control IC with Soft Start

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U2008B_07 数据手册

U2008B

2. Pin Configuration

Figure 2-1. Pinning

OUTPUT

ISENSE

VSYNC

Cϕ

U2008B

Rϕ

CONTROL

-VS

GND

Table 2-1.

Pin Description

Symbol

ISENSE

Cϕ

Function

Load current sensing

Ramp voltage

CONTROL Control input/compensation output

GND

-VS

Ground

Supply voltage

Rϕ

Ramp current adjustment

Voltage synchronization

Trigger output

VSYNC

OUTPUT

2.1

Mains Supply, Pin 5

The integrated circuit U2008B, which also contains voltage limiting, can be connected via D₁and

R₁to the mains supply, see Figure 1-2 on page 2. Supply voltage, between Pin 4 (pos., ⊥) and

Pin 5, is smoothed by C₁.

The series resistance R1 can be calculated as follows:

_M– V_Smax

-----------------------------

R_1max= 0.85 ×

2 × I_tot

where:

V_M

= Mains voltage

V_Smax

I_tot

I_Smax

I_x

= Maximum supply voltage

= I_Smax+ I_x= Total current compensation

= Maximum current consumption of the IC

= Current consumption of the external components

Operation with externally stabilized DC voltage is not recommended.

4712C–AUTO–07/07

1 234 5 6 7...13

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