參數(shù)資料
型號: VNC1L-1A
廠商: Future Technology Devices International Ltd
元件分類: 總線控制器
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP48
封裝: 7 X 7 MM, 0.50 MM PITCH, GREEN, LQFP-48
文件頁數(shù): 21/32頁
文件大小: 672K
代理商: VNC1L-1A
Copyright 2009 Future Technology Devices International Limited
28
Document Reference No.: FT_000030
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.02
Clearance No.: FTDI# 50
8.2 Solder Reflow Profile
The recommended solder reflow profile is shown in Figure 8.2.
Figure 8.2 VNC1L Solder Reflow Profile
The recommended values for the solder reflow profile are detailed in Table 8.1. Values are shown for both
a completely Pb free solder process (i.e. VNC1L is used with Pb free solder) and for a non-Pb free solder
process (i.e. VNC1L is used with non-Pb free solder).
Profile Feature
Pb Free Solder Process
Non-Pb Free Solder Process
Average Ramp Up Rate (Ts to Tp)
3°C / second Max.
Preheat
- Temperature Min (TS Min.)
- Temperature Max (TS Max.)
- Time (tS Min to tS Max)
150°C
200°C
60 to 180 seconds
100°C
150°C
60 to 120 seconds
Time Maintained Above Critical
Temperature TL:
- Temperature (TL)
- Time (tL)
217°C
60 to 150 seconds
183°C
60 to 150 seconds
Peak Temperature (TP)
260°C
240°C
Time within 5°C of actual Peak
Temperature (tP)
20 to 40 seconds
10 to 30 seconds
Ramp Down Rate
6°C / second Max.
Time for T= 25°C to Peak Temperature, Tp
8 minutes Max.
6 minutes Max.
Table 8.1 Reflow Profile Parameter Value
Critical Zone: when
T is in the range
T to T
T
e
m
p
e
ra
tu
re
,
T
(D
e
g
re
e
s
C
)
Time, t (seconds)
25
P
T = 25 C to T
tp
Tp
TL
t
Preheat
S
t
L
Ramp Up
L
p
Ramp
Down
T Max
S
T Min
S
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