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STK401-040のメーカーはSanyo Semicon Deviceです、この部品の機能は「AF Power Amplifier」です。 |
部品番号 | STK401-040 |
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部品説明 | AF Power Amplifier | ||
メーカ | Sanyo Semicon Device | ||
ロゴ | |||
このページの下部にプレビューとSTK401-040ダウンロード(pdfファイル)リンクがあります。 Total 8 pages
Ordering number: EN 4679A
Thick Film Hybrid IC
STK401-040
AF Power Amplifier (Split Power Supply)
(25W+25W min, THD = 0.4%)
Overview
Package Dimensions
The STK401-040 is a thick-film audio power amplifier IC
belonging to a series in which all devices are pin compati-
ble. This allows a single PCB design to be used to con-
struct amplifiers of various output capacity simply by
changing hybrid ICs. Also, this series is part of a new,
larger series that comprises mutually similar devices with
the same pin compatibility. This makes possible the devel-
opment of a 2-channel amplifier from a 3-channel ampli-
fier using the same PCB. In addition, this new series
features 6/3Ω drive in order to support the low impedance
of modern speakers.
unit: mm
4134
[STK401-040]
Features
• Pin compatible
STK400-000 series (3-channel/single package)
↓
STK401-000 series (2-channel/single package)
• Output load impedance RL = 6/3Ω supported
• New pin configuration
Pin configuration has been grouped into individual
blocks of inputs, outputs and supply lines, minimizing
the adverse effects of pattern layout on operating char-
acteristics.
• Few external components
In comparison with existing series, external bootstrap
resistors and capacitors can be eliminated.
SANYO Electric Co., Ltd. Semiconductor Business Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
60597HA (ID) / 41495TH (ID) No. 4679—1/8
1 Page Equivalent Circuit
STK401-040
Sample PCB Layout for 2-Channel or 3-Channel Amplifiers
Copper (Cu) foil surface
Pin 6 of STK400-000 series devices corresponds to pin 1 of STK401-000 series devices.
No. 4679—3/8
3Pages External Circuit Diagram
STK401-040
Heatsink Design Considerations
The heatsink thermal resistance, θc-a, required to dissipate
the STK401-040 device total power dissipation, Pd, is
determined as follows:
Condition 1: IC substrate temperature not to exceed
125°C.
Pd × θc-a + Ta < 125°C ........................................ (1)
where Ta is the guaranteed maximum ambient tempera-
ture.
Condition 2: Power transistor junction temperature, Tj, not
to exceed 150°C.
Pd × θc-a + Pd/N × θj-c + Ta < 150°C ................. (2)
where N is the number of power transistors and θj-c is the
power transistor thermal resistance per transistor. Note
that the power dissipated per transistor is the total, Pd,
divided evenly among the N power transistors.
Expressions (1) and (2) can be rewritten making θc-a the
subject.
θc-a < (125 − Ta)/Pd ............................................. (1)′
θc-a < (150 − Ta)/Pd − θj-c/N .............................. (2)′
The heatsink required must have a thermal resistance that
simultaneously satisfies both expressions.
The heatsink thermal resistance can be determined from
(1)′ and (2)′ once the following parameters have been
defined.
• Supply voltage
• Load resistance
• Guaranteed maximum ambient temperature
The total device power dissipation when STK401-040
VCC = ±25V and RL = 6Ω, for a continuous sine wave sig-
nal, is a maximum of 44W, as shown in Figure 1.
When estimating the power dissipation for an actual audio
signal input, the rule of thumb is to select Pd correspond-
ing to 1/10 PO max (within safe limits) for a continuous
sine wave input. For example, from Figure 1,
Pd = 25.5W (for 1/10 PO max = 2.5W)
The STK401-040 has 4 power transistors, and the thermal
resistance per transistor, θj-c, is 2.1°C/W. If the guaran-
teed maximum ambient temperature, Ta, is 50°C, then the
required heatsink thermal resistance, θc-a, is:
From expression (1)′: θc-a < (125 − 50)/25.5
< 2.94
From expression (2)′: θc-a < (150 − 50)/25.5 − 2.1/4
< 3.39
Therefore, to satisfy both expressions, the required heat-
sink must have a thermal resistance less than 2.94°C/W.
No. 4679—6/8
6 Page | |||
ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ STK401-040 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
STK401-040 | AF Power Amplifier | Sanyo Semicon Device |