Delta Electronics Power Supply Series H48SR User Manual

FEATURES  
High Efficiency 88% @ 1.8V/ 60A  
Standard footprint: 58.4 x 61.0 x 11.7mm  
(2.30” x2.40” x0.46”)  
Industry standard pin out  
Startup into pre-biased load  
Fixed frequency operation  
Fully protected: OTP, OVP, OCP, UVLO  
No minimum load required  
Wide output trim range  
Fast transient response  
Basic insulation  
ISO 9001, TL 9000, ISO 14001, QS9000,  
OHSAS18001 certified manufacturing facility  
UL/cUL 60950 (US & Canada) Recognized,  
and TUV (EN60950) Certified  
CE mark meets 73/23/EEC and 93/68/EEC  
directives  
Delphi Series H48SR, 200W Half Brick Family  
DC/DC Power Modules: 48V in, 1.8V/60A out  
The Delphi Series H48SR Half Brick, 48V input, adjustable single  
output, isolated, open frame DC/DC converters are the latest offering  
from a world leader in power systems technology and manufacturing --  
Delta Electronics, Inc. This product family provides up to 200 watts of  
power or up to 80A of output current in an industry standard footprint.  
This product represents the next generation of design technology which  
may be utilized to provide high levels of current at very low output  
voltages required by today’s leading-edge circuitry. Utilizing an  
advanced patented thermal and electrical design technology, the Delphi  
Series H48SR converters are capable of providing higher output  
current capability with excellent transient response and lower common  
mode noise. Featuring a wide operating output voltage range and high  
current at low output voltages, these units offer more useable power  
over a wide range of ambient operating conditions. The wide range  
trimmable output feature allows the user to both reduce and  
standardize part numbers across different and/or migrating voltage  
requirements.  
OPTIONS  
Short lead lengths  
Latching/non-latching over voltage  
protection  
Positive remote on/off  
100V/100ms transient capability or  
80V input OVLO  
APPLICATIONS  
Telecom/DataCom  
Wireless Networks  
Optical Network Equipment  
Server and Data Storage  
Industrial/Test Equipment  
1
DS_H48SR1R860_06272006  
Delta Electronics, Inc.  
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ELECTRICAL CHARACTERISTICS CURVES  
95  
90  
85  
80  
75  
70  
65  
60  
24.0  
20.0  
16.0  
12.0  
8.0  
36Vin  
48Vin  
75Vin  
36Vin  
48Vin  
75Vin  
4.0  
0.0  
10  
20  
30  
40  
50  
60  
10  
20  
30  
40  
50  
60  
OUTPUT CURRENT(A)  
OUTPUT CURRENT (A)  
Figure 1: Efficiency vs. load current for minimum, nominal, and  
Figure 2: Power dissipation vs. load current for minimum,  
maximum input voltage at 25°C. (Vout=1.8V)  
nominal, and maximum input voltage at 25°C. (Vout=1,8V)  
90  
85  
80  
75  
70  
65  
24.0  
36Vin  
48Vin  
75Vin  
20.0  
16.0  
12.0  
8.0  
4.0  
36Vin  
48Vin  
75Vin  
60  
0.0  
10  
20  
30  
40  
50  
60  
10  
20  
30  
40  
50  
60  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
Figure 3: Efficiency vs. load current for minimum, nominal, and  
Figure 4: Power dissipation vs. load current for minimum,  
maximum input voltage at 25°C. (Vout=0.8V)  
nominal, and maximum input voltage at 25°C. (Vout=0.8V)  
3
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DS_H48SR1R860_06272006  
ELECTRICAL CHARACTERISTICS CURVES  
90  
24.0  
20.0  
16.0  
12.0  
8.0  
88  
86  
84  
82  
80  
78  
4.0  
36Vin  
48Vin  
75Vin  
36Vin  
48Vin  
75Vin  
76  
0.0  
0.8  
1.0  
1.2  
1.4  
1.6  
1.8  
0.8  
1.0  
1.2  
1.4  
1.6  
1.8  
OUTPUT VOLTAGE (V)  
OUTPUT VOLTAGE (V)  
Figure 5: Efficiency vs. output voltage for minimum, nominal,  
Figure 6: Power dissipation vs. output voltage for minimum,  
and maximum input voltage at 25°C. (Iout=60A)  
nominal, and maximum input voltage at 25°C. (Iout=60A)  
5.0  
Io=60A  
Io=36A  
Io=6A  
4.0  
3.0  
2.0  
1.0  
0.0  
30  
35  
40  
45  
50  
55  
60  
65  
70  
75  
INPUT VOLTAGE (V)  
Figure 7: Typical input characteristics at room temperature  
Figure 8: Turn-on transient at full rated load current (resistive  
load) (1 ms/div). Top Trace: Vout; 1V/div; Bottom Trace:  
ON/OFF input: 2V/div  
4
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DS_H48SR1R860_06272006  
ELECTRICAL CHARACTERISTICS CURVES  
Figure 9: Turn-on transient at zero load current (2 ms/div).  
Top Trace: Vout: 1V/div; Bottom Trace: ON/OFF input:  
2V/div  
Figure 10: Output voltage response to step-change in load  
current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:  
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:  
Vout (20 mV/div), Bottom Trace: Iout (20A/div). Scope  
measurement should be made using a BNC cable (length shorter  
than 20 inches). Position the load between 51 mm to 76 mm (2  
inches to 3 inches) from the module..  
Figure 11: Output voltage response to step-change in load  
current (75%-50%-75% of Io, max: di/dt = 2.5A/µs). Load  
cap: 470µF, 35mESR solid electrolytic capacitor and 1µF  
ceramic capacitor. Top Trace: Vout (100mV/div), Bottom  
Trace: Iout (20A/div). Scope measurement should be made  
using a BNC cable (length shorter than 20 inches). Position  
the load between 51 mm to 76 mm (2 inches to 3 inches)  
from the module.  
Figure 12: Test set-up diagram showing measurement points for  
Input Terminal Ripple Current and Input Reflected Ripple Current.  
Note: Measured input reflected-ripple current with a simulated  
source Inductance (LTEST) of 12 µH. Capacitor Cs offset possible  
battery impedance. Measure current as shown above.  
5
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DS_H48SR1R860_06272006  
ELECTRICAL CHARACTERISTICS CURVES  
Figure 13: Input Terminal Ripple Current, ic, at full rated  
output current and nominal input voltage with 12µH source  
impedance and 33µF electrolytic capacitor (500 mA/div).  
Figure 14: Input reflected ripple current, is, through a 12µH  
source inductor at nominal input voltage and rated load current  
(5 mA/div).  
Copper Strip  
Vo(+)  
SCOPE  
RESISTIVE  
LOAD  
10u  
1u  
Vo(-)  
Figure 15: Output voltage noise and ripple measurement  
test setup  
Figure 16: Output voltage ripple at nominal input voltage and  
rated load current (50 mV/div). Load capacitance: 1µF ceramic  
capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz.  
Scope measurement should be made using a BNC cable (length  
shorter than 20 inches). Position the load between 51 mm to 76  
mm (2 inches to  
3 inches) from the module.  
2.0  
1.8  
1.6  
1.4  
1.2  
1.0  
0.8  
0.6  
0.4  
Vin=48V  
0.2  
0.0  
0
10  
20  
30  
40  
50  
60  
70  
80  
LOAD CURRENT (A)  
Figure 17: Output voltage vs. load current showing typical  
current limit curves and converter shutdown points.  
6
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DS_H48SR1R860_06272006  
THERMAL CURVES  
Figure 18: Hot spot location (unit in mm)  
Figure 19: Output current vs. ambient temperature and air  
velocity (Vin=48V / 75V, Vout=0.8V )  
Figure 20: Output current vs. ambient temperature and air  
Figure 21: Power dissipation vs. ambient temperature and air  
velocity (Vin=48V / 75V, Vout=1.8V )  
velocity (Vin=48V / 75V, Vout=0.8V~1.8V )  
7
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DS_H48SR1R860_06272006  
DESIGN CONSIDERATIONS  
Do not ground one of the input pins without grounding  
one of the output pins. This connection may allow a  
non-SELV voltage to appear between the output pin  
and ground.  
Input Source Impedance  
The impedance of the input source connecting to the  
DC/DC power modules will interact with the modules  
and affect the stability. A low ac-impedance input  
source is recommended. If the source inductance is  
more than a few µH, we advise adding a 10 to 100 µF  
electrolytic capacitor (ESR < 0.7 at 100 kHz)  
mounted close to the input of the module to improve the  
stability.  
The power module has extra-low voltage (ELV) outputs  
when all inputs are ELV.  
This power module is not internally fused. To achieve  
optimum safety and system protection, an input line  
fuse is highly recommended. The safety agencies  
require a normal-blow fuse with 20A maximum rating to  
be installed in the ungrounded lead. A lower rated fuse  
can be used based on the maximum inrush transient  
energy and maximum input current.  
Layout and EMC Considerations  
Delta’s DC/DC power modules are designed to operate  
in a wide variety of systems and applications. For  
design assistance with EMC compliance and related  
PWB layout issues, please contact Delta’s technical  
support team. An external input filter module is  
available for easier EMC compliance design.  
Application notes to assist designers in addressing  
these issues are pending release.  
Soldering and Cleaning Considerations  
Post solder cleaning is usually the final board assembly  
process before the board or system undergoes  
electrical testing. Inadequate cleaning and/or drying  
may lower the reliability of a power module and  
severely affect the finished circuit board assembly test.  
Adequate cleaning and/or drying is especially important  
for un-encapsulated and/or open frame type power  
modules. For assistance on appropriate soldering and  
cleaning procedures, please contact Delta’s technical  
support team.  
Safety Considerations  
The power module must be installed in compliance with  
the spacing and separation requirements of the end-  
user’s safety agency standard, i.e., UL60950,  
CAN/CSA-C22.2 No. 60950-00 and EN60950:2000 and  
IEC60950-1999, if the system in which the power  
module is to be used must meet safety agency  
requirements.  
When the input source is 60 Vdc or below, the power  
module meets SELV (safety extra-low voltage)  
requirements. If the input source is a hazardous voltage  
which is greater than 60 Vdc and less than or equal to  
75 Vdc, for the module’s output to meet SELV  
requirements, all of the following must be met:  
The input source must be insulated from any  
hazardous voltages, including the ac mains, with  
reinforced insulation.  
One Vi pin and one Vo pin are grounded, or all the  
input and output pins are kept floating.  
The input terminals of the module are not operator  
accessible.  
If the metal baseplate is grounded the output must  
be also grounded.  
A SELV reliability test is conducted on the system  
where the module is used to ensure that under a  
single fault, hazardous voltage does not appear at  
the module’s output.  
8
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DS_H48SR1R860_06272006  
FEATURES DESCRIPTIONS  
Over-Current Protection  
Vi(+)  
Vo(+)  
The modules include an internal output over-current  
protection circuit, which will endure current limiting for  
an unlimited duration during output overload. If the  
output current exceeds the OCP set point, the modules  
will automatically shut down (hiccup mode).  
Sense(+)  
ON/OFF  
Sense(-)  
Vi(-)  
Vo(-)  
The modules will try to restart after shutdown. If the  
overload condition still exists, the module will shut down  
again. This restart trial will continue until the overload  
condition is corrected.  
Figure 22: Remote on/off implementation  
Remote Sense  
Over-Voltage Protection  
Remote sense compensates for voltage drops on the  
output by sensing the actual output voltage at the point  
of load. The voltage between the remote sense pins  
and the output terminals must not exceed the output  
voltage sense range given here:  
The modules include an internal output over-voltage  
protection circuit, which monitors the voltage on the  
output terminals. If this voltage exceeds the over-  
voltage set point, the module will shut down and latch  
off. The over-voltage latch is reset by cycling the input  
power for one second.  
[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] 10% × Vout  
Over-Temperature Protection  
This limit includes any increase in voltage due to  
remote sense compensation and output voltage set  
point adjustment (trim).  
The over-temperature protection consists of circuitry  
that provides protection from thermal damage. If the  
temperature exceeds the over-temperature threshold  
the module will shut down.  
Vi(+) Vo(+)  
Sense(+)  
The module will try to restart after shutdown. If the over-  
temperature condition still exists during restart, the  
module will shut down again. This restart trial will  
continue until the temperature is within specification.  
Sense(-)  
Remote On/Off  
Vi(-) Vo(-)  
Contact  
Resistance  
Contact and Distribution  
Losses  
The remote on/off feature on the module can be either  
negative or positive logic. Negative logic turns the  
module on during a logic low and off during a logic high.  
Positive logic turns the modules on during a logic high  
and off during a logic low.  
Figure 23: Effective circuit configuration for remote sense  
operation  
If the remote sense feature is not used to regulate the  
output at the point of load, please connect SENSE(+)  
to Vo(+) and SENSE(–) to Vo(–) at the module.  
Remote on/off can be controlled by an external switch  
between the on/off terminal and the Vi(-) terminal. The  
switch can be an open collector or open drain.  
The output voltage can be increased by both the  
remote sense and the trim; however, the maximum  
increase is the larger of either the remote sense or the  
trim, not the sum of both.  
For negative logic if the remote on/off feature is not  
used, please short the on/off pin to Vi(-). For positive  
logic if the remote on/off feature is not used, please  
leave the on/off pin floating.  
When using remote sense and trim, the output voltage  
of the module is usually increased, which increases the  
power output of the module with the same output  
current.  
Care should be taken to ensure that the maximum  
output power does not exceed the maximum rated  
power.  
9
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DS_H48SR1R860_06272006  
FEATURES DESCRIPTIONS (CON.)  
Output Voltage Adjustment (TRIM)  
To increase or decrease the output voltage set point,  
the modules may be connected with an external  
resistor between the TRIM pin and either the  
SENSE(+) or SENSE(-). The TRIM pin should be left  
open if this feature is not used.  
Figure 24: Circuit configuration for trim-down (decrease  
output voltage)  
If the external resistor is connected between the TRIM  
and SENSE (-) the output voltage set point decreases  
(Fig. 24). The external resistor value required to obtain  
a percentage output voltage change % is defined  
as:  
Figure 23: Circuit configuration for trim-up (increase output  
voltage)  
10kΩ  
Rtrim down  
(
)
=
11kΩ  
If the external resistor is connected between the TRIM  
and SENSE (+) pins, the output voltage set point  
increases (Fig. 23). The external resistor value  
required to obtain a percentage of output voltage  
change % is defined as:  
where  
Vonom = nominal Vout (1.8V)  
= trim expressed as decimal fraction, i.e. 40% is  
written as 0.4  
Ex. When trim down to 0.8V from 1.8V  
Vonom = 1.8V  
= (1.8-0.8)/1.8 = 0.5556  
Vonom  
(
1+ ∆  
Vref∆  
)
Vref  
Rtrim up  
(
)
=
10k11kΩ  
10K  
Rtrim down =  
11KΩ = 7KΩ  
where  
0.5556  
Vonom = nominal Vout (1.8V)  
Vref = 1.225V  
The output voltage can be increased by both the remote  
sense and the trim, however the maximum increase is  
the larger of either the remote sense or the trim, not the  
sum of both.  
= trim expressed as decimal fraction, i.e. 10% is written  
as 0.1  
Ex. When trim up to 1.9V from 1.8V  
Vonom = 1.8V  
Vref = 1.225V  
When using remote sense and trim, the output voltage  
of the module is usually increased, which increases the  
power output of the module with the same output  
current.  
= (1.9-1.8)/1.8 = 0.05556  
[(  
1.8*  
(
1.05556  
)
1.225  
)]  
Rtrim up =  
×10KΩ  
1.225*0.05556  
Care should be taken to ensure that the maximum  
output power of the module remains at or below the  
maximum rated power.  
11KΩ = 88.18KΩ  
Output voltage  
Resistor value ( k)  
1.5V  
1.2V  
1.0V  
0.9V  
0.8V  
49.00  
19.00  
11.50  
9.0  
7.0  
Figure 25: Trim resistor value example for popular output  
voltages. Connect the resistor between the TRIM and SENSE  
(-) pins.  
10  
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DS_H48SR1R860_06272006  
THERMAL CONSIDERATIONS  
Thermal management is an important part of the  
system design. To ensure proper, reliable operation,  
sufficient cooling of the power module is needed over  
the entire temperature range of the module. Convection  
cooling is usually the dominant mode of heat transfer.  
PWB  
MODULE  
FACING PWB  
Hence, the choice of equipment to characterize the  
thermal performance of the power module is a wind  
tunnel.  
AIR VELOCITY  
AND AMBIENT  
TEMPERATURE  
MEASURED BELOW  
THE MODULE  
50.8 (2.0”)  
Thermal Testing Setup  
AIR FLOW  
Delta’s DC/DC power modules are characterized in  
heated vertical wind tunnels that simulate the thermal  
environments encountered in most electronics  
equipment. This type of equipment commonly uses  
vertically mounted circuit cards in cabinet racks in which  
the power modules are mounted.  
12.7 (0.5”)  
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)  
Figure 26: Wind Tunnel Test Setup  
The following figure shows the wind tunnel  
characterization setup. The power module is mounted  
on a test PWB and is vertically positioned within the  
wind tunnel. The space between the neighboring PWB  
and the top of the power module is constantly kept at  
6.35mm (0.25’’).  
Thermal Derating  
Heat can be removed by increasing airflow over the  
module. The module’s maximum device temperature is  
115and the measured location is illustrated in Figure  
18. To enhance system reliability, the power module  
should always be operated below the maximum  
operating temperature. If the temperature exceeds the  
maximum module temperature, reliability of the unit  
may be affected.  
11  
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DS_H48SR1R860_06272006  
MECHANICAL DRAWING  
Pin No. Name  
Function  
1
2
3
4
5
6
7
8
-Vin  
Negative input voltage  
Remote ON/OFF  
ON/OFF  
+Vin  
+Vout  
+SENSE  
TRIM  
Positive input voltage  
Positive output voltage  
Positive remote sense  
Output voltage trim  
Negative remote sense  
Negative output voltage  
-SENSE  
-Vout  
Notes:  
Pins 1-3, 5-7 are 1.00mm (0.039”) diameter  
Pins 4 and 8 are 2.00mm (0.079”) diameter  
All pins are copper with Tin plating.  
1
2
3
12  
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DS_H48SR1R860_06272006  
PART NUMBERING SYSTEM  
H
48  
S
R
1R8  
60  
N
R
F
A
Form  
Input  
Number of Product  
Output  
Output  
ON/OFF  
Pin  
Option Code  
Factor  
H – Half-Brick  
Voltage  
48-  
36V~75V  
Outputs  
S- Single  
Series  
R- Single 1R8- 1.8V  
Board  
Voltage  
Current  
60- 60A  
80- 80A  
Logic  
N-Negative  
P-Positive  
Length  
R-0.170”  
N-0.145”  
K-0.110”  
A - Standard  
Functions  
F- RoHS 6/6  
(Lead Free)  
MODEL LIST  
Part Number  
H48SR1R860NRFA  
H48SR1R880NRFA  
H48SR3R360NRFA  
INPUT  
OUTPUT  
0.8V – 1.9V  
EFF @ 100% LOAD  
36V~75V  
60A  
80A  
60A  
88%  
89%  
90%  
3.7A  
5.0A  
6.4A  
36V~75V  
36V~75V  
0.8V – 1.9V  
1.45V – 3.6V  
Please contact us for modules with fixed output voltages.  
USA:  
Europe:  
Asia & the rest of world:  
Telephone:  
Telephone: +41 31 998 53 11  
Fax: +41 31 998 53 53  
Telephone: +886 3 4526107 x6220  
Fax: +886 3 4513485  
East Coast: (888) 335 8201  
West Coast: (888) 335 8208  
Fax: (978) 656 3964  
WARRANTY  
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon  
request from Delta.  
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for  
its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is  
granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these  
specifications at any time, without notice.  
13  
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DS_H48SR1R860_06272006  

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