LE79R1011JC 参数 Datasheet PDF下载

RING-TRIP COMPONENTS

R

RT2

=

42 kΩ

C

RT

=

1.0

µF

V

BAT1

R

RT1

=

300

•

CF

•

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

• (

R

LRT

+ 150 + 2R

F

)

V

BAT1

–

3.5

–

(

15

µA •

300

•

CF

• (

R

LRT

+ 150 + 2R

F

) )

where R

LRT

= Loop-detection threshold resistance for ring trip and CF = Crest factor of ringing signal (≈ 1.414)

Figure 3. Input via Output of Sinusoidal with DC Offset

V

RING

R

Ref

Vbat/2

Figure 4.

A (TIP)

Feed Programming

a

R

L

b

I

L

SLIC

RSN

R

DC1

R

DC2

B (RING)

RDC

C

DC

Feed current programmed by R

DC1

and R

DC2

14

Le79R101 Data Sheet