Power Electronics Group
PRELIMINARY
Release 1.A
HEHB 10A-48V-5V
HEHB 10A-48V-5V
48V
in
10A
out
5V
out
High Efficiency, Isolated
Half Brick DC-DC Converter
Feat
t
ure
s
Fea ure
s
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Very high efficiency: 91%@10A,
(50Vin, 25°C, 300LFM)
Wide input voltage range (36 to 75Vdc)
Total weight: 63g. (2.22oz.) Open-Frame version
Max 85g. (2.99oz.) Metal-Plate version
Low profile, industry standard footprint and pin out:
2.3" x 2.4" x 0.40" (58.4mm x 61.0mm x 10.2mm)
Adjustable output voltage (+/- 10%)
Input to Output Isolation at 2000Vdc,10Meg Ohm
Fixed Frequency (250 KHz)
Undervoltage Lockout (UVLO)
Overcurrent protection
Overtemperature protection
Auto-restart after overcurrent shutdown
Remote sense
Remote ON/OFF
Operating temperature -40/+100°C
ISO 9001 Certified manufacturing processes
UL, CSA, CE Approvals Pending
Product
t
Hi
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ght
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Produc H gh gh s
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The HEHB DC-DC Converter family is
Magnetek’s solution for next generation,
cutting-edge board applications.
The synchronous rectification topology
uses MOSFET instead of Schottky diodes
providing extreme reduction in heat
generation, boosting efficiency (91%
typical), eliminating the need for a heat sink
and increasing reliability.
The low profile (0.40”), open frame
construction allows smaller card pitch and
improves ventilation.
The fixed (250kHz) switching frequency
provides predictable EMI characteristics.
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- Pag 1 -
HEHB10A – 48V - 5V High Efficiency DC-DC Converter
Speci
i
f
f
i
i
cat
ti
ons
Spec ca
i
ons
MagneTek
(Typical value standard at nominal input line, full load, airflow 300 LFM, 25°C ambient temperature unless otherwise
specified)
Input Characteristics
Nominal Input Voltage (V
INnom
)
Input Surge Voltage
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
Notes & Conditions
Note 1
T< 10µs
Min
36
Typ
48
Max
75
100
35.4
32.1
3.32
3.5
70
6
UNITs
V
DC
V
DC
V
DC
V
DC
V
DC
A
mA
mA
2
As
mA
35.0
31.7
3.28
V
IN
=36V; Full Load
35.2
31.9
3.30
60
4
tbd
See figure1
(measurement
pointA)
5
7
Output
Characteristics
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Over 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
Maximum Output Capacitance
Notes & Conditions
50 % Load
Min
4.98
Typ
5.00
±6
±6
± 25
Max
5.02
± 10
± 10
± 40
5.05
Units
V
mV
mV
mV
V
mV
mV
A
A
V
µF
4.95
20 MHz bandwidth
tbd
tbd
-
14
2.3
30 A at 5 V
Resistive Load
40000
0
Output Voltage
10% low
11
10
19
Dynamic
Characteristics
Output Voltage Current Transient
Positive Step Change in I
OUT
Negative Step Change in I
OUT
Settling Time to 1%
Turn On Transient
Turn On Time
Output Voltage Overshoot
Notes & Conditions
Min
Typ
Max
Units
50% lo to 75% lo
75% lo to 50% lo
tbd
tbd
tbd
15
20
mV
mV
µs
ms
%
10mF load
capacitance, Iout=
0A
3
Efficiency
100% Load
80% Load
50% Load
Notes & Conditions
Vin=50V
Vin=50V
Vin=50V
Min
90
91
90
Typ
91
92
91
Max
Units
%
%
%
NOTE 1:
Absolutely max. input voltage 80V
4
HEHB10A – 48V - 5V High Efficiency DC-DC Converter
Isolation Charac.
Isolation Voltage
- In/Out
Isolation Capacitance
Isolation Resistence
10
Notes & Conditions
Min
Typ
2000
5.5
Max
MagneTek
Units
V
DC
nF
MΩ
General Charac.
Operating Range Temperature
Storage Temperature
Relative Humidity
Approvals
Current Protection
Notes & Conditions
Maximum Rating
Maximum Rating
Non condensing
Pending
Min
Typ
Max
Units
-40
+100
°C
-50
+120
°C
5
95
%
EN60955; UL1950; CSA950; CE
hiccup mode
Feature Characteristics
Switching frequency
ON/OFF Control
Off-State Voltage
On-State Voltage
Output Voltage Trim Range
Output Over-Voltage Protection
Min.
Typ.
250
Max
Units
kHz
V
V
%
%
2.7
0
-10
15
0.8
+10
130
Measurement point A
Source
impedance
Is
DC/DC
Converter
Vout
-
-
Ic
ESR
Cerami c
cap
Cerami c
cap
Figure 1. Test set-up diagram showing measurement point for
Input Reflected Ripple Current (point A)
5
Microcontroller MCU
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