Teccor ? brand Thyristors
Multipulse? SIDACs
Figure 10: Typical Metal Halide Ignitor Circuit
H.V.
Step-up
Ballast
0.1- 0.1 5 μF
Kxxx1G
Transformer
220 V / 240 V
5 0 / 60 Hz
0.22- 0.33μF
5 - 6μH
5 .6K- 8.2K
5 W
Metal
Halide
Lamp
Note: With proper component selection, this circuit will produce three pulses for ignition of
metal halide lamp that requires a minimum of three pulses at 4kV magnitude and >1uSec
duration each at a minimum repetition rate of 3.3kHz.
Soldering Parameters
Re?ow Condition
- Temperature Min (T s(min) )
Pb – Free assembly
150°C
T P
Ramp-up
t P
Pre Heat
- Temperature Max (T s(max) )
- Time (min to max) (t s )
200°C
60 – 180 secs
T L
T S(max)
t L
Ramp-down
Average ramp up rate (Liquidus Temp)
(T L ) to peak
T S(max) to T L - Ramp-up Rate
5°C/second max
5°C/second max
T S(min)
t S
Preheat
Re?ow
- Temperature (T L ) (Liquidus)
- Temperature (t L )
217°C
60 – 150 seconds
25
time to peak temperature
Time
260
Peak Temperature (T P )
+0/-5
°C
Time within 5°C of actual peak
Temperature (t p )
Ramp-down Rate
Time 25°C to peak Temperature (T P )
Do not exceed
20 – 40 seconds
5°C/second max
8 minutes Max.
280°C
Kxxx1G Series
334
Revised: August 29, 2008
?2008 Littelfuse, Inc.
Speci?cations are subject to change without notice.
Please refer to http://www.littelfuse.com for current information.
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