MQFL-28VE-1R8S
Output:
1.8V
Current:
40A
technical Specification
MQFL-28VE-1R8S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min.
Typ.
Max. Units Notes & Conditions
Vin=28V dc ±5%, Iout=40A, CL=0µF, free running (see Note 10)
boost-converter non-operational unless otherwise specified
Group A
Subgroup
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Product # MQFL-28VE-1R8S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005206 Rev. 1
04/22/09
Page 4
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strength
Input RTN to Output RTN
500
V
1
Any Input Pin to Case
500
V
1
Any Output Pin to Case
500
V
1
Isolation Resistance (in rtn to out rtn)
100
MΩ
1
Isolation Resistance (any pin to case)
100
MΩ
1
Isolation Capacitance (in rtn to out rtn)
44
nF
1
FEATURE CHARACTERISTICS
Switching Frequency (free running)
500
550
600
kHz
1, 2, 3
Synchronization Input
Frequency Range
500
600
kHz
1, 2, 3
Logic Level High
2.0
V
1, 2, 3
Logic Level Low
-0.5
0.8
V
1, 2, 3
Duty Cycle
20
80
%
See Note 5
Synchronization Output
Pull Down Current
20
mA
VSYNC OUT = 0.8V
See Note 5
Duty Cycle
25
75
%
Output connected to SYNC IN of other MQFL unit
See Note 5
Enable Control (ENA1 and ENA2)
Off-State Voltage
0.8
V
1, 2, 3
Module Off Pulldown Current
80
µA
Current drain required to ensure module is off
See Note 5
On-State Voltage
2
V
1, 2, 3
Module On Pin Leakage Current
20
µA
Imax draw from pin allowed with module still on
See Note 5
Pull-Up Voltage
3.2
4.0
4.5
V
See Figure A
1, 2, 3
BOOST-CONVERTER OPERATION
Input Voltage Arming Value
17.5
18.0
18.8
V
1, 2, 3
Switching Frequency
600
670
740
kHz
1, 2, 3
Input Terminal Current Ripple (RMS)
1
A
Vin = 16V; Iout = 40A
Total Converter Efficiency
Iout = 15A (10Vin)
80
%
1, 2, 3
Iout = 15A (16Vin)
82
%
1, 2, 3
Iout = 30A (16Vin)
82
%
1, 2, 3
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
2200
103 Hrs.
AIF @ Tcase = 70ºC
390
103 Hrs.
Demonstrated MTBF
TBD
103 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
79
g
Electrical Characteristics Notes
1. Converter will undergo input over-voltage shutdown.
2. Derate output power to 50% of rated power at Tcase = 135ºC (see Figure 5).
3. High or low state of input voltage must persist for about 200µs to be acted on by the lockout or shutdown circuitry.
4. Current limit inception is defined as the point where the output voltage has dropped to 90% of its nominal value.
5. Parameter not tested but guaranteed to the limit specified.
6. Load current transition time ≥ 10µs.
7. Settling time measured from start of transient to the point where the output voltage has returned to ±50mV of its final value.
8. Line voltage transition time ≥ 100µs.
9. Input voltage rise time ≤ 250µs.
10. Operating the converter at a synchronization frequency above the free running frequency will cause the converter’s efficiency to be slightly reduced
and it may also cause a slight reduction in the maximum output current/power available. For more information consult the factory.
11. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section of the Control Features description.
12. After a disable or fault event, module is inhibited from restarting for 300ms. See Shut Down section of the Control Features description.
13. Only the ES and HB grade products are tested at three temperatures. The C grade products are tested at one temperature. Please refer to the
Construction and Environmental Stress Screening Options table for details.
14. These derating curves apply for the ES- and HB- grade products. The C- grade product has a maximum case temperature of 100ºC.
15. Input Over Voltage Shutdown test is run at no load, full load is beyond derating condition and could cause damage at 125ºC.
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