STK433-890N-E

No.A2109-7/12

Recommended external components

STK433-840N-E/890N-E

Parts

Location

Recommended

value

Circuit purpose

Above

Recommended value

Below

Recommended value

R01, R02

100

Ω/1W

Resistance for Ripple filters. (Fuse resistance is recommended.

Ripple filter is constituted with C03, C04.)

Short-through current

may decrease at

high frequency.

Short-through current

may increase at high

frequency.

R03,R04,R05,

R06

1k

Ω

Resistance for input filters.

-

-

R07,R08,R09,

R10

56k

Ω

Input impedance is determined.

Output neutral voltage (VN) shift.

(It is referred that R07=R11, R08=R12,

R09=R13, R10=R14)

R11,R12,R13,

R14

56k

Ω

Voltage Gain (VG) is determined with R15, R16, R17, R18

-

-

R15,R16,R17,

R18

1.8k

Ω

Voltage Gain (VG) is determined with R11, R12, R13, and R14.

(As for VG, it is desirable to set up by R15, R16, R17, and R18.)

It may oscillate.

(Vg < 30dB)

With especially no

problem

R19,R20,R21,

R22

4.7

Ω

Resistance for oscillation prevention.

-

-

R23,R24,R25,

R26

4.7

Ω/1W

Resistance for oscillation prevention.

-

-

R27,R28,R29,

R30

0.22

Ω

±10%, 5W

Output emitter resi@stor (Metal-plate Resistor is recommended.)

Decrease of

Maximum output

Power

It may cause thermal

runaway

R31

Note *4

Select Restriction resistance, for the impression voltage of ‘#13 (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,C04

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 R01, R02.)

The change in the Ripple ingredient mixed in

an input side from a power supply line

C05,C06,C07,

C08

2.2

μF/50V

Input coupling capacitor. (For DC current prevention.)

-

C09,C10,C11,

C12

470pF

Input filter capacitor

• A high frequency noise is reduced with the filter constituted by

R03, R04, R05, R06.

-

C13,C14,C15,

C16

5pF

Capacitor for oscillation prevention.

It may oscillate.

C17,C18,C19,

C20

10

μF/10V

Negative feedback capacitor.

The cutoff frequency of a low cycle changes.

(fL = 1/(2

π ⋅ C17 ⋅ R15))

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.

C21,C22,C23,

C24

0.1

μF

Capacitor for oscillation prevention.

It may oscillate.

C25,C26,C27,

C28

100pF

Capacitor for oscillation prevention.

It may oscillate.

L01,L02,L03,

L04

3

μH

Coil for oscillation prevention.

With especially

no problem

It may oscillate.