STK433-290-E

No. A1630-5/13

Recommended External Components

Parts

Location

Recommended

value

Circuit purpose

Above Recommended

value

Below Recommended

value

R01, R23

100

Ω/1W

Resistance for ripple filter.

(Fuse resistance is recommended. Ripple filter is

constituted with C03, C23.)

-

Short-through current

may increase at high

frequency.

R02, R03, R04

1k

Ω

Resistance for input filters.

-

-

R05, R06, R07

56k

Ω

Input impedance is determined.

Output neutral voltage (VN) shift.

(It is referred that R05=R08, R06=R09, R07=R10)

R08, R09, R10

56k

Ω

Voltage gain (VG) is determined with R11, R12, R13

-

-

R11, R12, R13

1.8k

Ω

Voltage gain (VG) is determined with R8, R9, R10.

(As for VG, it is desirable to set up by R11, R12, R13.)

It may oscillate.

(VG

<30dB)

With especially no

problem

R14, R15, R16

4.7

Ω

Noise absorption resistance.

-

-

R17, R18, R19

4.7

Ω/1W

Resistance for oscillation prevention.

-

-

R20, R21, R22

0.22

Ω

±10%, 5W

Output emitter resistor

(Metal-plate resistor is recommended.)

Decrease of maximum

output Power

It may cause thrmal

runaway

R30

Note*5

Select restriction resistance, for the impression voltage of ‘#17 (Stand-By) pin’ must not exceed the maximum

rating.

C01, C02

100

μF/100V

Capacitor for oscillation prevention.

• Locate near the HIC as much as possible.

• Power supply impedance is lowered and stable

operation of the IC is carried out. (Electrolytic capacitor

is recommended.)

-

-

C03, C23

100

μF/100V

Decoupling capacitor

• The ripple ingredient mixed in an input side is removed

from a power supply line. (Ripple filter is constituted

with R03, R04.)

The change in the ripple ingredient mixed in an input

side from a power supply line

C04, C05, C06

2.2

μF/50V

Input coupling capacitor. (for DC current prevention.)

-

C07, C08, C09

470pF

Input filter capacitor

• A high frequency noise is reduced with the filter

constituted by R02, R03, R04.

-

C10, C11, C12

3pF

Capacitor for oscillation prevention.

It may oscillate.

C13, C14, C15

10

μF/10V

Negative feedback capacitor.

• The cutoff frequency of a low cycle changes.

(fL=1/(2π ⋅ C13 ⋅ R11))

The voltage gain (VG)

of low frequency is

extended. However, the

pop noise at the time of

a power supply injection

also becomes large.

The voltage gain (VG)

of low frequency

decreases.

C16, C17, C18

0.1

μF

Capacitor for oscillation prevention.

It may oscillate.

C19, C20, C21

68pF

Capacitor for oscillation prevention.

It may oscillate.

L01, L02, L03

3

μH

Coil for oscillation prevention.

With especially

no problem

It may oscillate.