STK433-290-E 查看數據表（PDF） - SANYO -> Panasonic
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STK433-290-E Datasheet PDF : 13 Pages
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STK433-290-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 109.7W 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 ≈ 85.0W
(when 1/8PO max. = 10W, PO max. = 80W).
The number of power transistors in audio amplifier block of these hybrid ICs, N, is 6, 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)/85.0
< 0.88
From formula (2)'
θc-a < (150 − 50)/85.0 − 2.1/6
< 0.82
Therefore, the value of 0.82°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.
STK433-300series Stand-by Control & Mute Control & Load-Short Protection
Application
+VCC
GND
-VCC
(*1) The impression voltage of a Stand-by terminal (#13) is
the maximum rating (VST max). Please set up not to exceed.
STK433-300 series
Ch1 Ch1 Ch2 Ch2
Ch1 Ch1 ST- Ch2 Ch2 Ch3 Ch3 Ch3 Ch3
-PRE -VCC +VCC OUT OUT OUT OUT +PRE SUB GND IN NF BY NF
IN
IN NF OUT OUT
12
3
4
5
6
78
9 10 11 12 13 14 15 16 17 18 19
56kΩ 6.8kΩ 56kΩ 6.8kΩ
56kΩ 6.8kΩ
2.7kΩ
1kΩ
33kΩ
Stand-by Control(ex)
H: Operation Mode(+5V)
L: Stand-by Mode(0V)
33μF
2kΩ
/10V
Load Short Protection
Circuit
SUB.GND
22kΩ
56kΩ
0.1μF
1kΩ
100kΩ Latch Up
Circuit
10kΩ
10kΩ
Ch3 IN
Ch2 IN
10kΩ
GND
10kΩ
10kΩ
Ch1 IN
Ch3 OUT
Ch2 OUT
GND
GND
GND
Ch1 OUT
2.2kΩ
Mute Control
H: Single Mute
L: Normal
+5V
Stand-by Control
Mute Control
ST-BY
+5V
MUTE
PLAY MUTE ST-BY
No. A1630-9/13
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