17 soldering, 2 soldering by dipping or by solder wave, 3 manual soldering – Philips TDA8928J User Manual
Page 21
2004 May 05
21
Philips Semiconductors
Preliminary specification
Power stage 2 x 10 or 1 x 20 W class-D
audio amplifier
TDA8928J
17 SOLDERING
17.1
Introduction to soldering through-hole mount
packages
This text gives a brief insight to wave, dip and manual
soldering. 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).
Wave soldering is the preferred method for mounting of
through-hole mount IC packages on a printed-circuit
board.
17.2
Soldering by dipping or by solder wave
Driven by legislation and environmental forces the
worldwide use of lead-free solder pastes is increasing.
Typical dwell time of the leads in the wave ranges from
3 to 4 seconds at 250
°
C or 265
°
C, depending on solder
material applied, SnPb or Pb-free respectively.
The total contact time of successive solder waves must not
exceed 5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
stg(max)
). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
17.3
Manual soldering
Apply the soldering iron (24 V or less) to the lead(s) of the
package, either below the seating plane or not more than
2 mm above it. If the temperature of the soldering iron bit
is less than 300
°
C it may remain in contact for up to
10 seconds. If the bit temperature is between
300 and 400
°
C, contact may be up to 5 seconds.
17.4
Suitability of through-hole mount IC packages for dipping and wave soldering methods
Notes
1. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board.
2. For PMFP packages hot bar soldering or manual soldering is suitable.
PACKAGE
SOLDERING METHOD
DIPPING
WAVE
CPGA, HCPGA
−
suitable
DBS, DIP, HDIP, RDBS, SDIP, SIL
suitable
suitable
−
not suitable