HEQB-25A-48V-2.
.
5V
HEQB-25A-48V-2 5V
48V
in
25A
out
2.5V
out
DC-DC Converter
High Efficiency, Isolated Quarter Brick
Feat
t
ure
s
Fea ure
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Very high efficiency: 90%
Wide input voltage range (36 to 75Vdc)
Low profile, industry standard footprint and pin out:
2.3" x 1.45" x 0.36" (58.4mm x 36.8mm x 9.35mm)
Total weight: 34g. (1.2oz.)
Remote ON/OFF
Output voltage trim
Remote sense
Fixed Frequency (Input-Output ripple 400 KHz)
Under voltage lockout (UVLO) – auto recover
Over voltage protection – auto recover
Over current protection – auto recover
Over temperature protection – auto recover
Operating temperature -40/+100°C
Input to Output Isolation at 2000Vdc,10MΩ
CSA/US, CSA, TUV and KEMA Certified
ISO 9001 Certified manufacturing processes
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Product
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HEQB Family of dc-dc converters is
Magnetek’s solution for next
generation, cutting-edge board
applications.
Synchronous rectification uses
MOSFET instead of Schottky diodes
providing extreme reduction in heat
generation, boosting efficiency,
eliminating the need for a heat sink and
increased reliability.
Low profile (0.36”), open frame
construction allows smaller card pitch
and improves system ventilation.
Fixed switching frequency provides
predictable EMI characteristics.
P/N 7Q02F5WL000
DS HEQB 25A 48V 2-5V_7Q02_030603 Rev 4A – page 1
Magnetek PEG web site, www.magnetekpower.com
HEQB–25A–48V–2.5V
Mechani
i
cal
l
Drawi
i
ngs
Mechan ca Draw ngs
- All dimensions are in inches (mm)
Tolerances: x.xx in. +/-0.2 in. (0.5mm)
2.3
(58.42)
0.14
(3.68)
2.01
(51)
Ø=0.06 (2 pcs)
(Ø=1.5) (2 pcs)
Ø=0.04 (6 pcs)
(Ø=1) (6 pcs)
1.45
(36.83)
0.3
(7.62)
0.42
(10.8)
0.3
(7.62)
Bottom View
PINOUT Description
Pin
1
2
3
4
5
6
7
8
P/N 7Q02F5WL000
Name
Vin (-)
ON/OFF
Vin (+)
Vout (+)
Sense (+)
TRIM
Sense (-)
Vout (-)
0.36
(9.35)
0.15
(4)
Function
Negative terminal for the input bus
External input signal, TTL. Output voltage ON or OFF
Positive terminal for the input bus
Positive terminal for output voltage
Positive remote sense
Output voltage TRIM
Negative remote sense
Return terminal for output voltage
DS HEQB 25A 48V 2-5V_7Q02_030603 Rev 4A – page 2
Magnetek PEG web site, www.magnetekpower.com
0.42
(10.8)
0.15x4
(3.81x4).
HEQB–25A–48V–2.5V
Speci
i
f
f
i
i
cat
t
i
i
ons
Spec ca ons
(Typical value standard at nominal input line, full load, airflow 300 LFM, 25°C ambient temperature unless otherwise specified)
Input Characteristics
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current (I
INmax
)
No-load Input Current
Off Converter Input Current
Inrush Current Transient Rating
Input Reflected-Ripple Current
NOTE 1:
:
Absolute max. input voltage 80V
NOTE 1:
NOTE 1
Output Characteristics
Output Voltage Set Point
Output Voltage Regulation
Load
Line
Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak to Peak
RMS
Operating Output Current Range
Output DC Current Limit Inception
Output DC Current Limit Shutdown
Voltage
Admissible Output Capacitance
Notes & Conditions
50% Load
V
nom
= 48V
I = 15A
2.475
20 MHz bandwidth
Full load;
see figures 1, 4
0
26
See figure 5
Full load, resistive
2
0
50
14
-
27
2.1
Min
2.48
Typ
2.5
±5
±2
± 15
Max
2.52
±8
±5
± 30
2.535
70
20
25
29
2.2
20.000
Units
V
mV
mV
mV
V
mV
mV
A
A
V
µF
Notes & Conditions
Note 1
Min
36
34.3
33.8
0.4
V
IN
=36V; Full Load
40
55
4
0.01
3
Typ
48
34.8
34.3
0.5
Max
75
35.4
34.8
0.6
1.95
65
6
UNITs
V
V
V
V
A
mA
mA
2
As
mA
RMS, See figure 1
Dynamic Characteristics
Output Voltage Current Transient
Positive Step Change
Negative Step Change
Settling Time to 1%
Turn-On Transient
Overshoot
Turn-On Time
Start-Up Inhibit Period
Efficiency
100% Load
80% Load
56% Load
Notes & Conditions
470µF load cap,
1A/µs; see figure 9
50%I
o
to 75% I
o
75% I
o
to 50% I
o
See figures 6 and 7
Full load
Min
Typ
Max
Units
160
160
300
0
15
120
Min
Typ
90
90
90
mV
mV
µs
%
ms
ms
Units
%
%
%
20
Notes & Conditions
Max
Isolation Characteristics
Isolation Voltage - input to output
Isolation Capacitance
Isolation Resistance
Notes & Conditions
Basic Isolation
Basic Isolation
Min
Typ
2000
2200
Max
10
Units
V
DC
pF
MΩ
P/N 7Q02F5WL000
DS HEQB 25A 48V 2-5V_7Q02_030603 Rev 4A – page 3
Magnetek PEG web site, www.magnetekpower.com
HEQB–25A–48V–2.5V
Feature Characteristics
Switching frequency
ON/OFF Control
Off-State Voltage
On-State Voltage
Output Voltage Trim Range
Output Voltage Remote Sense
Range
Output Over-Voltage Protection
Overcurrent Protection Threshold
Over-Temperature shutdown
Average PCB
temperature
Notes & Conditions
Maximum Rating
Maximum Rating
Non condensing
Bellcore Issue 4
RDF93 HRD Issue 5
Min
-40
-50
5
Double Frequency for
Input-Output Ripple
Min.
190
2.7
0
-10
Typ.
200
Max
210
10
0.5
+10
+10
115
119
26-35 A
125
°C
123
Units
kHz
V
V
%
%
%
General Characteristics
Operating Range Temperature
Storage Temperature
Relative Humidity
Calculated MTBF
Approvals
Safety and Regulatory
Typ
Max
+100
+120
95
Units
°C
°C
%
Min. 1,500,000 hours
EN60955; UL1950; CSA22.2; CE
TUV and KEMA certified for compliance to EN 06950 requirements
CSA 22.2 No. 950-95(US and Canada) certified with basic insulation for compliance to UL 1950.
Note : An external input fuse must always be used for compliance to listed safety requirements.
CE compliant per 72/23/EEC (Low voltage directive) and 93/68/EEC to facilitate CE Mark at system level.
Material flammability rating, UL94V-0
NEBS compliant
Charact
t
eri
i
st
t
i
i
c Curves
Charac er s c Curves
Figure 2
Figure 3
Figure 4
-
Is
Ic
DC/DC
Converter
Vout
-
ESR
Cerami c
cap
FIGURE 1:
Set-up diagram showing measurement p
oints for:
Input
Terminal Ripple Current, Input Reflected
Ripple Current and Output Voltage Ripple
P/N 7Q02F5WL000
DS HEQB 25A 48V 2-5V_7Q02_030603 Rev 4A – page 4
Magnetek PEG web site, www.magnetekpower.com
HEQB–25A–48V–2.5V
FIGURE 2:
Input Reflected Ripple Current, set-up per
figure 1; 10µH source impedance. Nominal
input voltage at full rated load.
FIGURE 3:
Input Terminal Ripple Current, set-up per
figure 1; 10µH source impedance and 47µF
electrolytic capacitor Nominal input voltage at
full rated load.
FIGURE 4:
Output Voltage Ripple, set-up per figure 1; 1µF
ceramic capacitor and 10µF tantalum capacitor.
Nominal input voltage at full rated load
FIGURE 5:
Load current as a function of time while
attempting to enable into a short circuit, <10mΩ.
P/N 7Q02F5WL000
DS HEQB 25A 48V 2-5V_7Q02_030603 Rev 4A – page 5
Magnetek PEG web site, www.magnetekpower.com
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