pca9922 NXP Semiconductors, pca9922 Datasheet - Page 23

• Manufacturer Part Number: pca9922
• Description: 8-channel Constant Current Led Driver With Output Error Detection
• Manufacturer: NXP Semiconductors

NXP Semiconductors
17. Soldering of through-hole mount packages
PCA9922_1
Product data sheet
17.1 Introduction to soldering through-hole mount packages
17.2 Soldering by dipping or by solder wave
17.3 Manual soldering
For further information on temperature profiles, refer to Application Note AN10365
“Surface mount reflow soldering description” .
This text gives a very brief insight into wave, dip and manual soldering.
Wave soldering is the preferred method for mounting of through-hole mount IC packages
on a printed-circuit board.
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 seconds 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
printed-circuit board has been pre-heated, forced cooling may be necessary immediately
after soldering to keep the temperature within the permissible limit.
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 C and 400 C, contact may be up to 5 seconds.
Fig 18. Temperature profiles for large and small components
temperature
MSL: Moisture Sensitivity Level
8-channel constant current LED driver with output error detection
Rev. 01 — 15 January 2009
= minimum soldering temperature
maximum peak temperature
minimum peak temperature
= MSL limit, damage level
temperature
peak
stg(max)
PCA9922
© NXP B.V. 2009. All rights reserved.
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