STK433-090-E Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

STK433-090-E

2-channel class AB audio power IC, 80W+80W

SANYO -> Panasonic 

STK433-090-E

[Example]

When the IC supply voltage, VCC, is ±33V and RL is 6Ω, the total power dissipation, Pd, within the hybrid IC, will

be a maximum of 75W at 1kHz for a continuous sine wave signal according to the Pd-PO characteristics.

For the music signals normally handled by audio amplifiers, a value of 1/8PO max is generally used for Pd as an

estimate of the power dissipation based on the type of continuous signal. (Note that the factor used may differ

depending on the safety standard used.)

This is:

Pd ≈ 59.0W

(when 1/8PO max. = 10W, PO max. = 80W).

The number of power transistors in audio amplifier block of these hybrid ICs, N, is 4, and the thermal resistance per

transistor, θj-c, is 2.1°C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature,

Ta, of 50°C will be as follows.

From formula (1)'

θc-a < (125 − 50)/59.0

< 1.27

From formula (2)'

θc-a < (150 − 50)/59.0 − 2.1/4

< 1.17

Therefore, the value of 1.17°C/W, which satisfies both of these formulae, is the required thermal resistance of the heat

sink.

Note that this thermal design example assumes the use of a constant-voltage power supply, and is therefore not a

verified design for any particular user’s end product.

STK433-100 Series Standby Control, Mute Control, Load-short Protection & DC

offset Protection application

+VCC

GND

-VCC

STK433-100 series

Ch1 Ch1 Ch2 Ch2

Ch1 Ch1

Ch2 Ch2

-PRE -VCC +VCC OUT OUT OUT OUT +PRE SUB GND IN NF ST-BY NF IN

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

56kΩ6.8kΩ 56kΩ 6.8kΩ

(*1) The voltage applied to the Stand-by pin (#13) must not exceed the

maximum rated value (VST max).

(*1)

13kΩ

1kΩ

33kΩ

33μF

2kΩ

/10V

Stand-by Control (ex)

H: Operation Mode (+5V)

L: Stand-by Mode (0V)

Load short

protection

circuit

22kΩ

56kΩ

Latch up

circuit

1kΩ

0.1μF

R1

V1

(*1)

10kΩ 100kΩ

Ch2 OUT

82kΩ

GND

GND

22μF

100

82kΩ 22μF

kΩ

Ch1 OUT

DC offset protection

Ch2 IN

10kΩ

GND

10kΩ

10kΩ

Ch1 IN

2.2kΩ

Mute Control

H: Single Mute

L: Normal

+5V

Standby

Control

Mute

Control

ST-BY

+5V

MUTE

PLAY

MUTE ST-BY

No. A1248-8/11

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