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参数资料
| 型号： | TDA8920TH/N1,118 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 80 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | PLASTIC, SOT-566-3, HSOP-24 |
| 文件页数： | 26/36页 |
| 文件大小： | 733K |
| 代理商： | TDA8920TH/N1,118 |
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2002 Sep 25
32
Philips Semiconductors
Product specication
2
× 80 W class-D power amplier
TDA8920
18 SOLDERING
18.1
Introduction to soldering surface mount
packages
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
“Data Handbook IC26; Integrated Circuit Packages”
(document order number 9398 652 90011).
There is no soldering method that is ideal for all surface
mount IC packages. Wave soldering can still be used for
certain surface mount ICs, but it is not suitable for fine pitch
SMDs. In these situations reflow soldering is
recommended.
18.2
Reow soldering
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example,
convection or convection/infrared heating in a conveyor
type oven. Throughput times (preheating, soldering and
cooling) vary between 100 and 200 seconds depending
on heating method.
Typical reflow peak temperatures range from
215 to 250
°C. The top-surface temperature of the
packages should preferable be kept below 220
°C for
thick/large packages, and below 235
°C for small/thin
packages.
18.3
Wave soldering
Conventional single wave soldering is not recommended
for surface mount devices (SMDs) or printed-circuit boards
with a high component density, as solder bridging and
non-wetting can present major problems.
To overcome these problems the double-wave soldering
method was specifically developed.
If wave soldering is used the following conditions must be
observed for optimal results:
Use a double-wave soldering method comprising a
turbulent wave with high upward pressure followed by a
smooth laminar wave.
For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint
longitudinal axis is preferred to be parallel to the
transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis
must be parallel to the transport direction of the
printed-circuit board.
The footprint must incorporate solder thieves at the
downstream end.
For packages with leads on four sides, the footprint must
be placed at a 45
° angle to the transport direction of the
printed-circuit board. The footprint must incorporate
solder thieves downstream and at the side corners.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Typical dwell time is 4 seconds at 250
°C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
18.4
Manual soldering
Fix the component by first soldering two
diagonally-opposite end leads. Use a low voltage (24 V or
less) soldering iron applied to the flat part of the lead.
Contact time must be limited to 10 seconds at up to
300
°C.
When using a dedicated tool, all other leads can be
soldered in one operation within 2 to 5 seconds between
270 and 320
°C.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8922 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2 x 25 W class-D power amplifier |
| TDA8922B | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2 X 50 W class-D power amplifier |
| TDA8922BJ | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2 X 50 W class-D power amplifier |
| TDA8922BJ/N2,112 | 功能描述:音频放大器 2X50W CLASSD PWR AMP RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA8922BTH | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2 X 50 W class-D power amplifier |
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