Espressif Systems ESP32-WROVER-E User Manual page 15

5. Electrical Characteristics
5.6 Reflow Profile
250
217
200
Ramp-up zone
1 ~ 3 /s
100
50
25
0
50
0
Ramp-up zone — Temp.: <150
Preheating zone — Temp.: 150 ~ 200
Reflow zone — Temp.: >217
Cooling zone — Peak Temp. ~ 180
Solder — Sn&Ag&Cu Lead-free solder (SAC305)
Preheating zone
150 ~ 200 60 ~ 120s
100
Time: 60 ~ 90s Ramp-up rate: 1 ~ 3 /s
Time: 60 ~ 120s Ramp-up rate: 0.3 ~ 0.8 /s
7LPH60 ~ 90s; Peak Temp.: 235 ~ 250
Ramp-down rate: -1 ~ -5 /s
Figure 2: Reflow Profile
150 200
(<245 recommended) Time: 30 ~ 70s
13
Peak Temp.
235 ~ 250
Cooling zone
Reflow zone
!217 60 ~ 90s -1 ~ -5 /s
Soldering time
> 30s
Time (sec.)
250