OUTPUT SPECIFICATIONS
Output power
125 Watts max
Voltage accuracy Full load and nominal Vin
1.5%
Voltage adjustability (Note1)
+ 10% , -20%
Minimum load
None
Line regulation LL to HL at FL
0.2%
Load regulation No load to Full load
See table
Remote Sense
10% of Vout
Ripple and noise
20MHz bandwidth (Measured
with a 1uF M/C and a 10uF T/C)
100mVp-p
Temperature coefficient
I
0.02% / C, max
Transient response recovery time
25% load step change
200uS
Over voltage protection
threshold(Non-latching Hiccup)
120% Vout max
Over Current Protection threshold
110% ~ 140% of lout Rated
Short circuit protection
Hiccup, automatics recovery
INPUT SPECIFICATIONS
Input voltage range
48V nominal input
36 75VDC
Under voltage lockout
Power up
Power down
34V typ.
32V typ.
Input filter (Note 2)
L-C type
Input surge voltage 100mS max
100VDC
Start up time
Nominal Vin and
constant resistor load
Power up
Remote ON/OFF
25mS typ
25mS typ
Remote ON/OFF (Note3)
(Negative logic)
(Positive logic)
DC-DC ON
DC-DC OFF
DC-DC ON
DC-DC 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
GENERAL SPECIFICATIONS
Efficiency
See table
Isolation voltage
Input to Output
Input to Case
Output to Case
1600VDC,min
1000VDC,min
1000VDC,min
Isolation resistance
10
7
ohms, min
Isolation capacitance
2500 pF, max
Switching frequency
270 KHz, typ
Approvals and standard
IEC60950, UL60950, EN60950
Case material
Aluminum base plate
Weight (approx)
42g (1.46 oz)
MTBF
Bellcore TR-NWT-000332, Tc=40 C , Io=80%,max 2.5 x 10
6
hrs
ENVIRONMENTAL SPECIFICATIONS
Operating base-plate temperature range (Note 4)
-40
C
to +100
C
Over temperature protection
110C, max
Storage temperature range
-55
C
to +125
C
Thermal shock
MIL-STD-810D
Vibration
10~55Hz, 2G, 3minutes period, 30minutes along X,Y and Z
Humidity , Max , Non-Condensing
95%
EMC CHARACTERISTICS
Conducted emissions
EN55022 (Note 5)
EN55022 (Note 5)
Level A
Level B
Radiated emissions
EN55022
Level A
ESD
Radiated immunity
Fast transient
Surge
Conducted immunity
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
Perf. Criteria2
SINGLE OUTPUT UP TO 35A
INDUSTRY STANDARD FOOTPRINT
NO MINIMUM LOAD
ADJUSTABLE OUTPUT VOLTAGE
UNDER-VOLTAGE LOCKOUT
HIGH EFFICIENCY UP TO 90%
COMPACT 2.28 X 1.45 X 0.50 INCH PACKAGE
FIXED SWITCHING FREQUENCY
QEB125 single output DC/DC converters provide up to 125 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 35A 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 QEB125 converters are especially suited to telecom, networking and
industrial application.
T E C H N I C A L S P E C I F I C A T I O N
All specifications are typical at nominal input, full load and 25C otherwise noted
UL E193009
TUV R50020744
CB JPTUV-5363
CE MARK
Model
Number
Input
Range
Output
Voltage
Output
Current
Eff
(6)
(%)
Load
regulation
QEB125-48S1P8
36 75 VDC
1.8 VDC
35A
84
5.4mV
QEB125-48S2P5
36 75 VDC
2.5 VDC
35A
86
7.5mV
QEB125-48S3P3
36 75 VDC
3.3 VDC
30A
88
10mV
QEB125-48S05
36 75 VDC
5 VDC
25A
90
15mV
PRODUCT OPTIONS TABLE
Option Suffix
Negative remote ON/OFF logic, 0.20" pin length (standard)
-
Negative remote ON/OFF logic, 0.145" pin length
-L
Negative remote ON/OFF logic, 0.11" pin length
-K
Positive remote ON/OFF logic, 0.20" pin length
-P
Positive remote ON/OFF logic, 0.145" pin length
-S
Positive remote ON/OFF logic, 0.11" pin length
-M
Note
1. Maximum output deviation is 10% inclusive of trim. If remote sense is not being used, the +V sense should be connected to its corresponding
+OUTPUT and likewise the sense should be connected to its corresponding OUTPUT.
2.
An external filter capacitor is required for normal operation. The capacitor should be capable of handing 1A ripple current for 48V models. Power mate
suggest: Nippon chemi-con KMF series, 220 F/100V, ESR 90m .
3. The negative / positive logic and pin length are optional ( see table ). The pin voltage is referenced to negative input.
4. Heat sink is optional and P/N
7G-0029
7G-0030
7G-0031
7G-0032.
5. The QEB125 meets level A and level B conducted emissions only with external components connected before the input pin to the converter.
6. Typical value at nominal input voltage and full load
7. BASEPLATE
GROUNGING
Base-plate should be grounded at one of the four screw bolts prior to operation.
8. The converter is provided by basic insulation.
PIN
Define
1
- INPUT
2
ON/OFF
3
+ INPUT
4
- OUTPUT
5
- SENSE
6
TRIM
7
+ SENSE
8
+ OUTPUT
PIN CONNECTION
Output can be externally trimmed by
using the method shown below.
EXTERNAL OUTPUT TRIMMING
7
6
TRIM UP
R
U
6
5
TRIM DOWN
R
D
Example
QEB125-48S3P3-P
(7)
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