AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
Reflow Condition
(IR/Convection or VPR Reflow)
Classification Reflow Profiles
Profile Feature
Average ramp-up rate
(TL to TP)
Preheat
-Temperature Min(Tsmin)
-Temperature Max (Tsmax)
-Time (min to max)(ts)
Time maintained above:
-Temperature (TL)
-Time (tL)
Peak/Classification Temperature(TP)
Time within 5°C of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25°C to Peak Temperature
Sn-Pb Eutectic Assembly
3°C/second max.
Pb-Free Assembly
3°C/second max.
100°C
150°C
60-120 seconds
183°C
60-150 seconds
See table 1
10-30 seconds
6°C/second max.
6 minutes max.
150°C
200°C
60-180 seconds
217°C
60-150 seconds
See table 2
10 seconds max.
6°C/second max.
8 minutes max.
*
All temperatures refer to topside of the package, measured on the package body surface.
Classification Reflow Profiles(Cont.)
Table 1. SnPb Entectic Process
–Package
Peak Reflow Temperatures
Package Thickness
<2.5mm
≥2.5mm
Volume mm <350
240+0/-5℃
225+0/-5℃
3
3
Volume mm
3
≥350
225+0/-5℃
225+0/-5℃
Volume mm
3
>2000
260+0℃
245+0℃
245+0℃
Table 2. Pb-free Process
–Package
Classification Reflow Temperatures
Package Thickness
<1.6mm
1.6mm - 2.5mm
≥2.5mm
Volume mm <350
260+0℃
260+0℃
250+0℃
Volume mm
3
350-2000
260+0℃
250+0℃
245+0℃
*Tolerance: The device manufacturer/supplier shall assure process compatibility up to and
including the stated classification temperature (this means Peak reflow temperature +0˚С. For
example 260˚С+0˚С) at the rated MSL level.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
3/15/2006 REV:1.1
Email:service@aimtron.com.tw
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AIMTRON [ AIMTRON TECHNOLOGY ]
