Technical Specification
100
95
90
85
80
75
70
66 Vin
110 Vin
65
150 Vin
60
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
4
3
2
400 LFM (2.0 m/s)
1
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 3: Encased converter (without heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Input: 66-160 V
Output: 48 V
Current: 3 A
Part No.: IQ1B480QTC03
24
20
16
12
8
66 Vin
4
110 Vin
150 Vin
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Load Current (A)
Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
4
3
2
400 LFM (2.0 m/s)
1
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.02 A/µs). Load cap: 1 µF ceramic capacitor. Ch 1:
Vout (5 V/div), Ch 2: Iout (1 A/div).
Figure 6: Output voltage response to step-change in input voltage
(1000 V/ms). Load cap: 100 µF, electrolytic output capacitance. Ch 1: Vout
(500 mV/div), Ch 2: Vin (50 V/div).
Product # IQ1BxxxQTCxx
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-IQ1BQTX Rev. D
02/06/09
Page 21