STA515 datasheet(12/14 Pages) STMICROELECTRONICS

12 / 14 page

STA5150

12/14

EXTERNAL COMPONENTS

Note: Vcontrol is the voltage at Att_Rel pin.

Name

Function

Value

Formula

Input resistor

10K

Ω

(|G| = 5, Rr = 50K

Ω)

Feedback resistor

50K

Ω

(|G| = 5, Ri = 10K

Ω

Cac

AC Decoupling capacitor

100nF

(fp = 16Hz,

Rac =100K

Ω )

Cct

Capacitor for the attack time

2.2

µF

(Tattack = 13mSec,

Vcontrol = 9V,

Ict = 1.5mA)

Release constant time Resistor

470K

Ω

(t = 1 Sec. ,

Cct = 2.2

µF )

Resistor for tracking input voltage

filter

10K

Ω

Resistor for tracking input voltage

filter

56K

Ω

Resistor for tracking input voltage

filter

10K

Ω

Capacitor for Tracking input

voltage filter

1nF

Dc decoupling capacitor

µF

Bias Resistor for Stby/Mute

function

10K

Ω

Stby/Mute constant time resistor

30K

Ω

Mute resistor

30K

Ω

Capacitor for Stby/Mute resistor

2.2

µF

R10 = R11

Sensing resistor for SOA detector

50m

Ω

5% 4W

R12

Conversion resistor for threshold

voltage

100K

Ω

C6 = C7

Power supply filter capacitor

100nF

R15 = R16

Centering resistor

400

Ω , 1W

C8 = C9

Tracking rail power supply filter

680nF

R13

Protection

Ω

R14

TRK_out

40K

Ω

C10 = C11

Power supply filter capacitor

470

µF , 63V

C12

Feedback capacitor

100pF

Schottky diode

SB360

-------

⋅

Cac

π fp Rac

⋅⋅

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

Cct

attack

Ict

Vcontrol

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

Rct

Cct

---------

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