MQHL-28-3R3S
3.3 V
15 A
Output:
Current:
Technical Specification
MQHL-28-3R3S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=28 V dc ±5%, Iout=15.0 A, CL=0 µF, free running (see Note 9)
unless otherwise specified
Subgroup
(see Note 12)
ISOLATION CHARACTERISTICS
Isolation Voltage
Input RTN to Output RTN
Any Input Pin to Case
Dielectric strength
500
500
500
100
100
V
V
1
1
1
1
1
1
Any Output Pin to Case
Isolation Resistance (in rtn to out rtn)
Isolation Resistance (any pin to case)
Isolation Capacitance (in rtn to out rtn)
FEATURE CHARACTERISTICS
Switching Frequency (free running)
Synchronization Input
V
MΩ
MΩ
nF
22
500
550
600
kHz
1, 2, 3
Frequency Range
500
2.0
-0.5
20
700
5.5
0.8
80
kHz
V
V
%
1, 2, 3
1, 2, 3
1, 2, 3
Logic Level High
Logic Level Low
Duty Cycle
See Note 5
Synchronization Output
Pull Down Current
20
40
mA
%
VSYNC OUT = 0.8 V
See Note 5
See Note 5
Duty Cycle
60
Output connected to SYNC IN of other MQFL unit
Enable Control (ENA)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
Module On Pin Leakage Current
Pull-Up Voltage
0.8
V
µA
V
µA
V
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
80
2
Current drain required to ensure module is off
20
4.8
Imax draw from pin allowed with module still on
See Figure A
3.2
4.0
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
3
2800
440
TBD
10 Hrs.
3
AIF @ Tcase = 70ºC
10 Hrs.
3
Demonstrated MTBF
10 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
50
g
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 ≥ 10 µs.
7. Line voltage transition time ≥ 100 µs.
8. Input voltage rise time ≤ 250 µs.
9. Operating the converter at a synchronization frequency above the free running frequency will slightly reduce the converter’s efficiency and may also
cause a slight reduction in the maximum output current/power available. For more information consult the factory.
10. After a disable or fault event, module is inhibited from restarting for 180 ms. See Shut Down section.
11. The module will attempt to start into an overload for 20ms before shutting down and waiting to Auto Retry.
12. 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 ESS
table for details.
13. 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 Tcase.
Product # MQHL-28-3R3S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005077 Rev. 1
05/27/09
Page 4
SYNQOR [ SYNQOR WORLDWIDE HEADQUARTERS ]
