鈥?/div>
FIXED SWITCHING FREQUENCY
QEB50 single output DC/DC converters provide up to 50 watts of output power in an
industry standard quarter-brick package and footprint. These units are specifically
designed to meet the power needs of low-voltage silicon. All models feature a wide input
range, trimmable output voltage and a 20A current rating. Remote sense and remote
on/off facilities are included as standard, and the converters are comprehensively
protected against over-current, over-voltage and over-temperature conditions. The
QEB50 converters are especially suited to telecom, networking and industrial
application.
UL E193009
TUV R50020744
CB JPTUV-5363
CE MARK
T E C H N I C A L S P E C I F I C AT I O N
OUTPUT SPECIFICATIONS
Output power
Voltage accuracy
Voltage adjustability
Minimum load
Line regulation
Load regulation
Remote Sense
Ripple and noise
Temperature coefficient
Transient response
25% load step change
recovery time
Over voltage protection
threshold(Non-latching Hiccup)
Over Current Protection threshold
Short circuit protection
20MHz bandwidth (Measured
with a 1uF M/C and a 10uF T/C)
LL to HL at FL
No load to Full load
Full load and nominal Vin
(Note1)
All specifications are typical at nominal input, full load and 25潞C otherwise noted
GENERAL SPECIFICATIONS
50 Watts max
鹵 1.5%
+ 10% , -20%
None
鹵0.2%
See table
10% of Vout
100mVp-p
Isolation resistance
Isolation capacitance
Switching frequency
Approvals and standard
Case material
Weight (approx)
MTBF
Bellcore TR-NWT-000332, Tc=40 潞C , Io=80%,max
Efficiency
Isolation voltage
Input to Output
Input to Case
Output to Case
See table
1600VDC,min
1000VDC,min
1000VDC,min
10 ohms, min
2500 pF, max
270 KHz, typ
IEC60950, UL60950, EN60950
Aluminum base plate
42g (1.46 oz)
2.5 x 10
6
hrs
7
I0.02%
/ 潞C, max
200uS
120% Vout max
ENVIRONMENTAL SPECIFICATIONS
Operating base-plate temperature range (Note 4)
Over temperature protection
Storage temperature range
Thermal shock
-40
潞C
to +100
潞C
110潞C, max
-55
潞C
to +125
潞C
MIL-STD-810D
10~55Hz, 2G, 3minutes period, 30minutes along X,Y and Z
95%
110% ~ 140% of Iout Rated
Hiccup, automatics recovery
INPUT SPECIFICATIONS
Input voltage range
Under voltage lockout
Input filter
(Note 2)
Nominal Vin and
constant resistor load
Power up
Remote ON/OFF
48V nominal input
Power up
Power down
36 鈥?75VDC
34V typ.
32V typ.
L-C type
100VDC
25mS typ
25mS typ
Vibration
Humidity , Max , Non-Condensing
EMC CHARACTERISTICS
Conducted emissions
Radiated emissions
ESD
Radiated immunity
Fast transient
Surge
Conducted immunity
EN55022 (Note 5)
EN55022 (Note 5)
EN55022
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
Level A
Level B
Level A
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
Input surge voltage 100mS max
Start up time
Remote ON/OFF (Note 3)
(Negative logic)
(Positive logic)
DC-DC
DC-DC
DC-DC
DC-DC
ON
OFF
ON
OFF
I
ON/OFF
= 1mA max
Short or 0V < Vr < 1.2V
Open or 3.5V < Vr < 15V
Open or 3.5V < Vr < 15V
Short or 0V < Vr < 1.2V
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