V48SH1R830
FEATURES


High efficiency: 89% @ 1.8V/30A
Size: 33.0x22.8x9.5mm
(1.30”x0.90”x0.37”)

Industry standard footprint and pinout

Fixed frequency operation

SMD and through-hole versions

Input UVLO

OTP and output OCP, OVP

Output voltage trim: -20%, +10%

Monotonic startup into normal and
pre-biased loads

1500V isolation and basic insulation

No minimum load required

No negative current during power or
enable on/off

ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS18001 certified manufacturing
facility

UL/cUL 60950-1 (US & Canada)
Recognized
Delphi Series V48SH, 1/16th Brick 100W
DC/DC Power Modules: 48V in, 1.8V, 30A out
The Delphi Series V48SH, 1/16
th
Brick, 48V input, single output,
OPTIONS
isolated DC/DC converter, is the latest offering from a world leader in

SMD pins
power systems technology and manufacturing ― Delta Electronics,

Short pin lengths available
Inc. This product family provides up to 100 watts of power or 40A of

Positive remote On/Off

Heat spreader
output current (1.8V and below) in an industry standard 1/16
th
brick
form factor (1.30” x 0.90”). The 1.8V output offers one of the highest
output currents available and provides up to 89% efficiency at full load.
With creative design technology and optimization of component
placement, these converters possess outstanding electrical and
thermal performance, as well as extremely high reliability under highly
stressful operating conditions. All modules are protected from
abnormal input/output voltage, current, and temperature conditions.
For lower power needs, but in a similar small form factor, please check
out Delta, V36SE (50W or 15A), S48SP (36W or 10A) and S36SE
(17W or 5A) series standard DC/DC modules.
DATASHEET
DS_V48SH1R830_10282013
APPLICATIONS

Optical Transport

Data Networking

Communications

Servers
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
V48SH1R830 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
2
Inrush Current (I t)
Start up Current
Input Terminal Ripple Current
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
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 Over Current Protection
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_V48SH1R830_10282013
Max.
Units
80
100
120
125
1500
Vdc
Vdc
°C
°C
Vdc
75
Vdc
35.5
33.5
3
1.8
80
12
1
Vdc
Vdc
Vdc
A
mA
mA
2
As
2.2
0.07
8
45
3
0.11
15
A
A
mA
dB
1.8
1.827
Vdc
1.854
mV
mV
mV
V
70
25
120
50
30
140
mV
mV
A
%
50
50
150
100
100
300
mV
mV
us
12
12
28
28
ms
ms
Cap ESR>=3mohm;
Full load; 5% overshoot of Vout at startup;
0
10000
µF
Vin=48V
Vin=48V
87.5
87.5
100ms
Refer to figure 20 for measuring point
Typ.
-40
-55
36
32.5
30.5
1
34
32
2
100% Load, 36Vin
50
7
With 100uF external input capacitor
Peak, Vin=36V, 100% Load, With 10000uF Co
RMS, Vin=48V, With 100uF input cap.
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
Io=Io, min to Io, max
Vin=36V to 75V
Tc=-40°C to125°C
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Output Voltage 10% Low
1.773
±5
±5
±18
1.746
0
110
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
89
89
%
%
1500
1500
Vdc
MΩ
pF
300
kHz
10
Von/off
Von/off
-0.7
2
0.8
15
V
V
Von/off
Von/off
Ion/off at Von/off=0.0V
Ion/off at Von/off=2V
Logic High, Von/off=15V
Max rated current guaranteed at full trim range
Max rated current guaranteed at full remote
sense range
Over full temp range; % of nominal Vout
-0.7
2
0.8
15
0.3
50
10
V
V
mA
uA
uA
%
10
%
Per Telecordia SR-332, 100% load, 40°C, 48Vin,
400LFM
Per Telecordia SR-332, 50% load, 25°C, 48Vin,
400LFM
Open frame
Refer to figure 20 for measuring point
10
-20
130
%
1.9
M hours
7.3
M hours
14.2
130
grams
°C
2
ELECTRICAL CHARACTERISTICS CURVES
11
91
75Vin
10
88
36Vin
9
85
8
36Vin
82
48Vin
7
6
79
48Vin
5
76
4
75Vin
73
3
70
2
8
16
24
32
40
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
8
16
24
32
40
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
2.5
2.3
2.1
INPUT CURRENT(A)
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE(V)
Figure 3: Typical full load input characteristics at room
temperature
DS_V48SH1R830_10282013
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Start up
0
0
0
0
Figure 4: Turn-on transient at full rated load current (10
ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace:
ON/OFF input, 5V/div
Figure 5: Turn-on transient at zero load current (10 ms/div).
Vin=48V. Top Trace: Vout: 1.0V/div, Bottom Trace: ON/OFF
input, 5V/div
For Input Voltage Start up
0
0
0
0
Figure 6: Turn-on transient at full rated load current (10
ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: Vin,
20V/div
0
0
Figure 8: 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 (50mV/div, 200us/div), Bottom Trace: Iout (10A/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
DS_V48SH1R830_10282013
Figure 7: Turn-on transient at zero load current (10 ms/div).
Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: Vin, 20V/div
0
0
Figure 9: Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 1.0A/µs). Load cap:
220µF tantalum capacitor and 1µF ceramic capacitor. Top
Trace: Vout (100mV/div, 200us/div), Bottom Trace: Iout
(10A/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
4
ELECTRICAL CHARACTERISTICS CURVES
is
ic
Vin+
+
+
0
Vin-
Cs: 220uF
100uF,
ESR=0.2 ohm @
25oC 100KHz
Figure 10: 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
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div, 1us/div)
Copper
Strip
Vo(+)
0
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 1us/div)
Figure 13: Output voltage noise and ripple measurement test
setup
0
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=40A)(50 mV/div, 1us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements 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.
DS_V48SH1R830_10282013
5
DESIGN CONSIDERATIONS
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 Ω at 100 kHz) mounted close to the
input of the module to improve the stability.

The input source must be insulated from the ac
mains by reinforced or double insulation.

The input terminals of the module are not operator
accessible.

A SELV reliability test is conducted on the system
where the module is used, in combination with the
module, to ensure that under a single fault,
hazardous voltage does not appear at the module’s
output.
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.
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., UL60950-1, CSA
C22.2 NO. 60950-1 2nd and IEC 60950-1 2nd : 2005 and
EN 60950-1 2nd: 2006+A11+A1: 2010, if the system in
which the power module is to be used must meet safety
agency requirements.
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2 or
SELV. An additional evaluation is needed if the source
is other than TNV-2 or SELV.
When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
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
Fast-acting fuse with 30A 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.
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.
When the input source is SELV circuit, 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:
DS_V48SH1R830_10282013
6
FEATURES DESCRIPTIONS
Over-Current Protection
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, and enter hiccup mode or latch
mode, which is optional.
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.
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.
For hiccup mode, the module will try to restart after
shutdown. If the over current condition still exists, the
module will shut down again. This restart trial will continue
until the over-current condition is corrected.
Vi(+)
Vo(+)
Sense(+)
ON/OFF
For latch mode, the module will latch off once it shutdown.
The latch is reset by either cycling the input power or by
toggling the on/off signal for one second.
Sense(-)
Vi(-)
Vo(-)
Over-Voltage Protection
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 enter in hiccup
mode or latch mode, which is optional.
For hiccup mode, the module will try to restart after
shutdown. If the over voltage condition still exists, the
module will shut down again. This restart trial will continue
until the over-voltage condition is corrected.
For latch mode, the module will latch off once it shutdown.
The latch is reset by either cycling the input power or by
toggling the on/off signal for one second.
Figure 15: Remote on/off implementation
Remote Sense
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:
[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout
This limit includes any increase in voltage due to remote
sense compensation and output voltage set point
adjustment (trim).
Over-Temperature Protection
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, and enter in auto-restart mode or
latch mode, which is optional.
For auto-restart mode, the module will monitor the module
temperature after shutdown. Once the temperature is
dropped and within the specification, the module will be
auto-restart.
For latch mode, the module will latch off once it shutdown.
The latch is reset by either cycling the input power or by
toggling the on/off signal for one second.
Remote On/Off
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.
DS_V48SH1R830_10282013
Vi(+)
Vo(+)
Sense(+)
Sense(-)
Vi(-)
Contact
Resistance
Vo(-)
Contact and Distribution
Losses
Figure 16: 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.
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.
7
FEATURES DESCRIPTIONS (CON.)
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.
Max rated current is guaranteed at full output voltage
remote sense range.
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect 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 18: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
Rtrim  up 
5.11Vo (100   ) 511

 10.2K
1.225

Ex. When Trim-up +10% (1.8V×1.1=1.98V)
5.111.8  (100  10) 511

 10.2  21.3K 
1.225 10
10
Figure 17: Circuit configuration for trim-down (decrease
output voltage)
Rtrim  up 
If the external resistor is connected between the TRIM
and SENSE (-) pins, the output voltage set point
decreases (Fig. 18). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
Trim resistor can also be connected to Vo+ or Vo- but it
would introduce a small error voltage than the desired
value.
 511

Rtrim  down  
 10.2 K 



Ex. When Trim-down -10% (1.8V×0.9=1.62V)
 511

Rtrim  down  
 10.2 K   40.9K 
 10

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.
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.
Max rated current is guaranteed at full output voltage
trim range.
DS_V48SH1R830_10282013
8
THERMAL CONSIDERATIONS
Thermal Derating
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.
Heat can be removed by increasing airflow over the module.
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.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
THERMAL CURVES
Thermal Testing Setup
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.
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’’).
Figure 20: Temperature measurement location
The allowed maximum hot spot temperature is defined at 120℃.
Output Current (A)
V48SH1R8(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Either Orientation)
40
PWB
FACING PWB
35
Natural
Convection
30
MODULE
100LFM
25
200LFM
300LFM
20
400LFM
15
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
500LFM
10
600LFM
5
50.8 (2.0”)
0
AIR FLOW
25
12.7 (0.5”)
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 21: Output Current vs. Ambient Temperature and Air
Velocity @ Vin=48V (Either Orientation)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 19: Wind tunnel test setup
DS_V48SH1R830_10282013
9
PICK AND PLACE LOCATION
RECOMMENDED PAD LAYOUT (SMD)
SURFACE-MOUNT TAPE & REEL
DS_V48SH1R830_10282013
10
LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
Note: The temperature refers to the pin of V48SH, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Peak Temp. 240 ~ 245 ℃
217℃
Ramp down
max. 4℃/sec.
200℃
150℃
Preheat time
100~140 sec.
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of V48SH, measured on the pin +Vout joint.
DS_V48SH1R830_10282013
11
MECHANICAL DRAWING
Surface-mount module
Pin No.
1
2
3
4
5
6
7
8
Name
+Vin
ON/OFF
-Vin
-Vout
-SENSE
TRIM
+SENSE
+Vout
DS_V48SH1R830_10282013
Through-hole module
Function
Positive input voltage
Remote ON/OFF
Negative input voltage
Negative output voltage
Negative remote sense
Output voltage trim
Positive remote sense
Positive output voltage
12
PART NUMBERING SYSTEM
V
48
Type of
Product
V - 1/16
Brick
S
H
1R8
30
N
R
Input Number of
Voltage Outputs
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/Type
4836V~75V
H - High
Power
1R8 - 1.8V
30 - 30A
N- Negative
P- Positive
R - 0.170”
N - 0.145”
S - Single
F
A
Option Code
F- RoHS 6/6 A - Standard Functions
(Lead Free) H - with Heatspreader
MODEL LIST
MODEL NAME
V48SH1R840NNFA
V48SH1R830NNFA
INPUT
36V~75V
36V~75V
OUTPUT
3A
2.5A
1.8V
1.8V
EFF @ 100% LOAD
40A
30A
88.5%
89%
Default remote on/off logic is negative and pin length is 0.170”
For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office.
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: DCDC@delta-corp.com
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107
Ext 6220~6224
Fax: +886 3 4513485
Email: DCDC@delta.com.tw
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.
DS_V48SH1R830_10282013
13
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