HEQB25A-48V-1.5V [BEL]
1-OUTPUT DC-DC REG PWR SUPPLY MODULE;
| 型号： | HEQB25A-48V-1.5V |
| 厂家： | 
BEL FUSE INC. |
| 描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE 输出元件 |
| 文件： | 总10页 (文件大小：560K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Release 0.C
P/N 7Q09D0WF000
HEQB25A-48V-1.5V
48Vin 25Aout 1.5Vout High Efficiency, isolated
Quarter Brick DC-DC Converter
Features
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Very high efficiency: 88%
Wide input voltage range (36 to 75Vdc)
Total weight: 34g. (1.2oz.)
Low profile, industry standard footprint and pin out:
2.3" x 1.45" x 0.36" (58.4mm x 36.8mm x 9.15mm)
Adjustable output voltage (+/- 10%)
Input to Output Isolation at 2000Vdc,10MΩ
Fixed Frequency (Input-Output ripple 400 KHz)
Undervoltage Lockout (UVLO)
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Overcurrent protection
Overtemperature protection
Auto-restart after overcurrent shutdown
Remote sense
Remote ON/OFF
Operating temperature -40/+100°C
ISO 9001 Certified manufacturing processes
CSA/US, CSA, Kema certified
Product Highlights
•
The HEQB 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, eliminating
the need for a heat sink and increasing
reliability.
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The low profile (0.36”), open frame
construction allows smaller card pitch and
improves ventilation.
The fixed switching frequency provides
predictable EMI characteristics.
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 1
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
Mechanical Drawings
- All dimensions are in inches (mm)
- Tolerances: x.xx in. +/-0.2 in. (0.5mm)
2.3
(58.42)
0.14
2.01
(51)
(3.68)
Ø=0.06 (2 pcs)
(Ø=1.5) (2 pcs)
Ø=0.04 (6 pcs)
(Ø=1) (6 pcs)
Bottom View
PINOUT Description
Pin
1
Name
Function
Return terminal for the -48V input bus
Vin (-)
ON/OFF
2
Logic signal referenced to Vin (-), TTL compatible
(internal pull up ) to turn converter on and off
Positive terminal for the +48V input bus
Positive terminal for output voltage
Positive remote sense
3
4
5
6
7
8
Vin (+)
Vout (+)
Sense (+)
TRIM
Output voltage TRIM
Sense (-)
Vout (-)
Negative remote sense
Return terminal for output voltage
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 2
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
Specifications
(Typical value standard at nominal input line, full load, airflow 300 LFM, 25°C ambient temperature unless otherwise specified)
Input Characteristics
Notes & Conditions
Note 1
Min
36
Typ
48
Max
75
Units
V
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
34.3
33.8
0.4
34.8
34.3
0.5
35.4
34.8
0.6
V
V
V
Maximum Input Current (IINmax
)
VIN=36V; Full Load
1.2
A
No-load Input Current
40
4.1
0.01
3
mA
mA
A2s
mA
Off Converter Input Current
6
Inrush Current Transient Rating
Input Reflected-Ripple Current
RMS; see figures 1, 2
NOTE 1:
NOTE 1:
NOTE 1: Absolute max. input voltage 80V
Output Characteristics
Notes & Conditions
50% Load
Min
Typ
Max
Units
V
Output Voltage Set Point
1.495
1.502
1.505
Output Voltage Regulation
Load
Vnom = 48V
I = 15A
± 5
± 2
± 8
± 5
mV
mV
mV
V
Line
Temperature
± 10
± 20
1.525
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak to Peak
1.475
20 MHz bandwidth
Full load;
40
60
20
25
29
mV
mV
A
see figure 1, 4
RMS
Operating Output Current Range
Output DC Current Limit Inception
Output DC Current Limit Shutdown
Voltage
0
-
26
27.5
A
See figure 5
1.2
1.225
1.275
V
Admissible Output Capacitance
Full load, resistive
20 000
µF
Dynamic
Notes & Conditions
Min
Typ
Max
Units
Characteristics
470µF load cap,
1A/µs; see figure 9
50%Io to 75% Io
75% Io to 50% Io
Output Voltage Current Transient
Positive Step Change
Negative Step Change
Settling Time to 1%
150
150
200
mV
mV
µs
Turn-On Transient
See figures 6 and 7
Full load
Turn-On Time
Start-Up Inhibit Period
15
120
25
ms
ms
Efficiency
Notes & Conditions
Min
Typ
88
88.5
88.5
Max
Units
%
@ 25A
@ 20A
@ 15A
%
%
Isolation Characterisitcs
Notes & Conditions
Basic Isolation
Basic Isolation
Min
10
Typ
2000
2200
Max
Units
VDC
pF
MΩ
Isolation Voltage input - output
Isolation Capacitance
Isolation Resistance
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 3
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
Feature Characteristics
Notes & Conditions
Double Frequency for
Input-Output Ripple
Min.
190
Typ.
200
Max
210
Units
kHz
Switching frequency
ON/OFF Control
Off-State Voltage
On-State Voltage
2.7
-10
15
0.8
+10
V
V
Output Voltage Trim Range
Output Voltage Remote Sense
Range
%
+10
123
%
%
Output Over-Voltage Protection
Overcurrent Protection Threshold
Over-Temperature shutdown
115
118.6
26 - 35 A
125
Typ
°C
General Characteristics
Notes & Conditions
Maximum Rating
Maximum Rating
Non condensing
Bellcore Issue 4
Min
-40
-50
Max
Units
°C
Operating Range Temperature
Storage Temperature
Relative Humidity
+100
+120
95
°C
%
Calculated MTBF
Approvals
Min. 1,500,000 hours
RDF93 HRD Issue 5
EN60955; UL1950; CSA22.2; CE
Characteristic Curves
Figure 3
Figure 2
Figure 4
DC/DC
Vout
-
Is
Converter
-
Ic
Cerami c
cap
ESR
FIGURE 1: Set-up diagram showing measurement
Points for Input Terminal Ripple
Current, Input Reflected Ripple Current
and Output Voltage Ripple
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 4
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
FIGURE 2: Input Reflected Ripple Current, through a
10µH source inductor at nominal input voltage
and rated load current.
FIGURE 3: Input Terminal Ripple Current.
Full rated output current and nominal input
voltage with 10µH source impedance and
47µF electrolytic capacitor.
(Ref. figure 1)
(Ref. figure 1)
FIGURE 4: Output voltage ripple at nominal input
voltage and rated load current.
FIGURE 5: Load current as a function of time when the
converter attempts to turn into a 10mΩ
short circuit
Load capacitance: 1µF ceramic capacitor
and 10µF tantalum capacitor.
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 5
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
FIGURE 6 : Turn-on transient at full load.
FIGURE 7 : Turn-on transient at zero load.
FIGURE 8: Output voltage response to step-change in
FIGURE 9: Output voltage response to step-change in
load current (50%-75%-50% of Ioutmax
:
load current (50%-75%-50% of Ioutmax :
dI/dt = 0.1A/µs). Load cap: 10µF tantalum
capacitor and 1µF ceramic capacitor.
dI/dt = 1A/µs). Load cap: 10µF tantalum
capacitor and 1µF ceramic capacitor.
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 6
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
0,95
0,9
0,85
0,8
0,75
0,7
Vin=48V
Vin=36V
Vin=75V
0,65
0,6
0,55
0,5
0
5
10
15
20
25
30
output current [A]
FIGURE 10: Efficiency vs. load current for different input voltages at 25°C
7
6
5
4
3
2
1
0
Vin=36V
Vin=48V
Vin=75V
0
5
10
15
20
25
30
output current [A]
FIGURE 11: Power dissipation vs. load current for different input voltages at 25°C
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 7
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
To be provided in the next issue
To be provided in the next issue
FIGURE 13: Thermal plot of converter at 23 amp load
current with 25°C air flowing at the rate of 200 LFM.
Air is flowing across the converter sideways from pin 1 to
pin 3 at nominal input voltage.
FIGURE 12: Maximum output power derating curves vs.
ambient air temperature for airflow rates of 0 LFM through
400 LFM with air flowing across the converter from pin 1 to
pin 3 at nominal input voltage.
To be provided in the next issue
To be provided in the next issue
FIGURE 14: Maximum output power derating curves vs.
ambient air temperature for airflow rates of 100 LFM
through 400 LFM with air flowing lengthwise from output to
input at nominal input voltage.
FIGURE 15: Thermal plot of converter at 25 amp load
current with 25°C air flowing at the rate of 200 LFM.
Air is flowing across the converter in the long direction
from output to input at nominal input voltage.
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 8
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
Features and Pins description
SAFETY
The converter is certified according to EN60950 (Kema), UL 1950 and CSA 22.2.
The converter has basic insulation rating. The converter meets NEBS compatibility.
An external input fuse must always be used.
ON-OFF CONTROL
The default logic is negative: the on/off (pin #2) voltage is referenced to the -Vin (pin #4) and must be lower than 0.8V
to turn the module on, and higher than 1.65V to shut the module off.
Consult the factory for availability of positive logic modules.
ON /OFF
ON /OFF
ON /OFF
Vin (-)
Vin (-)
Open Collector Enable Circuit
Vin (-)
Remote Enable Circuit
Vin (-)
Negative logic
Direct Logic Drive
(permanently Enabled)
OUTPUT VOLTAGE TRIM
The output voltage can be trimmed by means of an external resistor connected between Trim and either of the Remote
sense pins, +S or -S pins. The selection of the resistor follows the industry standard trim equations.
A resistor connected between Trim and –S pins will decrease the output voltage. For a decrease in the nominal output
voltage, ∆%, the value of the resistor can be calculated using the following equation:
−
511
∆%
1.5 V
target
Rtrim-down
=
−10.22kΩ
where
∆ =
×100%
1.5
TRIM DOWN
10000
1000
100
10
0
2
4
6
8
10
% Decrease in Output Voltage
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 9
HEQB25A-48V-1.5V High Efficiency DC-DC Converter
A resistor connected between Trim and + S pins will increase the output voltage. For a desired increase, ∆%, of the
nominal output voltage, the value of the resistor can be calculated using the following equation:
5.11*1.5 100 + ∆%
( )
511
∆%
Rtrim-up
=
−
−10.22 KΩ
1.225∆%
TRIM UP
10000
1000
100
trim up
10
0
1
2
3
4
5
6
7
8
9
10
% Increase in Output Voltage
REMOTE SENSE (+S or -S)
The remote sense inputs, +S or –S pins, must be connected to the load and/or output pins of the converter. To ensure
tight regulation at the system critical load, then the remote sense pins should be connected to the system critical load.
Reference applicable section of data sheet for maximum voltage compensation.
Ensure sufficient margin to the over voltage threshold, reference applicable sections of the data sheet and system
loading: output over-voltage protection –vs- system transient load condition(s).
THERMAL PROTECTION
The converter has internal thermal protection preventing hot spots on PCB from exceeding 120°C (248 °F).
Depending on the air flow rate and the ambient temperature, the over temperature protection limit is reached according
to Figures 12, 13, 14 and 15. When the over temperature protection is active the converter will enter into hiccup mode.
The converter will auto-recover when the fault condition is corrected.
OVERCURRENT PROTECTION
The overcurrent limit inception is typically 110% of the rated output current. When the overcurrent limit inception is
exceeded the output voltage will decrease, or constant current mode. Further increase in the current will induce the
voltage to decrease where the converter will eventually enter fault protection, or hiccup mode, reference Figure 5. The
converter will enter fault protection typically at 125% of rated output current. When the fault is removed the converter
will auto recover.
Ordering code
HEQB25A-48V-1.5V
US
Europe
Magnetek Inc.
Magnetek S. p. A
8966 Mason Avenue
Via S.Giorgio 642
Chatsworth, CA 91311, USA
Phone: (+1) 818.727.2216
Fax: (+1) 818.727.2276
Toll-Free Number: (+1) 800.621.0733
http: // www.magnetekpower.com
52028- Terranuova Bracciolini, Arezzo, Italy
Phone: (+39) 055.9195.1
Fax: (+39) 055.9195.248
http:// www.magnetek.it
P/N 7Q09D0WF000
DS HEQB 25A 48V 1-5V rev 0-C 7Q09.doc – page 10
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