MQFL-28-06S
Output:
6.0 V
Current:
20 A
Technical Specification
MQFL-28-06S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Input RTN to Output RTN
Any Input Pin to Case
Any Output Pin to Case
Isolation Resistance (input rtn to output rtn)
Isolation Resistance (any pin to case)
Isolation Capacitance (input rtn to output rtn)
500
500
500
100
100
44
500
500
2
-0.5
20
20
25
550
600
700
10
0.8
80
V
V
V
MW
MW
nF
kHz
kHz
V
V
%
mA
%
V
µA
V
µA
V
VSYNC OUT = 0.8V
Output connected to SYNC IN of another MQFL converter
1
1
1
1
1
1
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
See Note 5
See Note 5
See Note 5
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
Min.
Nom.
Max.
Units Notes & Conditions
Vin=28V DC
±
5%, Iout = 20A, C
L
= 0 µF, free running
10
Subgroup
13
unless otherwise specified
Group A
FEATURE CHARACTERISTICS
Switching Frequency (free running)
Synchronization Input
Frequency Range
Logic Level High
Logic Level Low
Duty Cycle
Synchronization Output
Pull Down Current
Duty Cycle
Enable Control (ENA1 and ENA2)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
Module On Pin Leakage Current
Pull-Up Voltage
75
0.8
80
2
3.2
4.0
20
4.5
Current drain required to ensure module is off
Maximum current draw from pin allowed with module still on
See Figure A
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ T
case
=70ºC
AIF @ T
case
=70ºC
Demonstrated MTBF
2800
440
TBD
79
10
3
Hrs.
10
3
Hrs.
10
3
Hrs.
g
WEIGHT CHARACTERISTICS
Device Weight
Electrical Characteristics Notes
1. Converter will undergo input over-voltage shutdown.
2. Derate output power to 50% of rated power at Tcase = 135º C.
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
³
10µs.
7. Settling time measured from start of transient to the point where the output voltage has returned to ±1% of its final value.
8. Line voltage transition time
³
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. After a disable or fault event, module is inhibited from restarting for 300ms. See Shut Down section on page 12.
12. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section on page 10.
13. Only the ES and HB grade products are tested at three temperatures. The B and C grade products are tested at one temperature. Please refer to the
ESS table on Page 11 for details.
14. These derating curves apply for the ES- and HB- grade products. The C- grade product has a maximum case temperature of 100º C and a maximum
junction temperature rise of 20º C above T
CASE
. The B- grade product has a maximum case temperature of 85º C and a maximum junction tempera-
ture rise of 20º C at full load.
Product # MQFL-28-06S
Phone 1-888-567-9596
Doc.# 005-2MQ060S Rev. A
8/6/07
Page 4
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