DELTA H48SC3R325PSFA

FEATURES
Š
High efficiency: 93% @ 3.3V/25A
Š
Standard footprint:
61.0x57.9x10.0mm (2.40”×2.28”×0.39”)
Š
Industry standard pin out
Š
Fixed frequency operation
Š
Input UVLO, Output OCP, OVP, OTP
Š
Basic insulation
Š
2250V isolation
Š
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing facility
Š
UL/cUL 60950-1 (US & Canada) recognized
Delphi Series H48SC3R325, 85W Half Brick Family
DC/DC Power Modules: 48V in, 3.3V/25A out
The Delphi Series H48SC3R325, half brick, 36V~75V input, single output,
isolated DC/DC converters is the latest offering from a world leader in
OPTIONS
power systems technology and manufacturing -- Delta Electronics, Inc. This
Š
Heat spreader available for
extended operation
product provides up to 85 watts of power in an industry standard half brick
footprint. 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 models are fully protected from abnormal
input/output voltage, current, and temperature conditions. The Delphi
Series converters meet all safety requirements with basic insulation.
APPLICATIONS
DATASHEET
DS_H48SC3R325_07122011
Š
Telecom / Datacom
Š
Wireless Networks
Š
Optical Network Equipment
Š
Server and Data Storage
Š
Industrial / Testing Equipment
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
H48SC3R325 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient
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
Minimum -Load Input Current
Off Converter Input Current
Inrush Current(I2t)
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 DC Current-Limit Inception
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
Output Capacitive Load
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Input to Case
Output to Case
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
Leakage Current
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
100ms
Please refer to Fig. 21 for measuring point
Typ.
0
0
-40
-55
5 seconds
Io=100% Load
Io=100% Load
Io=100% Load
Vin=36V, 100% Load
Vin=48V, Io=0A
Vin=48V
Units
75
100
116
125
2250
Vdc
Vdc
°C
°C
Vdc
36
48
75
Vdc
33
31
1
34
32
2
35
33
3
3.0
70
7.5
1
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
3.333
Vdc
±10
±10
3.37
mV
mV
mV
V
30
10
60
20
25
35
mV
mV
A
A
60
60
30
100
100
mV
mV
µs
15
15
25
25
20000
ms
ms
µF
3
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
Max.
20
60
3.267
Io=Io,min to Io,max
Vin=36V to 75V
Tc=-40°C to 85°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF Low ESR cap
Full Load, 1µF ceramic, 10µF Low ESR cap
3.23
Output Voltage 10% Low
27.5
3.300
±3
±3
±15
48V, Tested with 10µF aluminum, Low ESR cap
and 1µF Ceramic load cap, ΔIo/Δt=1A/10µS
50% to 75% Io.max
75% to 50% Io.max
Vin=48V, Io=100% Load
Vin=48V, Io=100% Load
Full load; 5% overshoot of Vout at startup
93
93.5
%
%
2250
2250
2250
10
1500
160
Vdc
Vdc
Vdc
MΩ
pF
kHz
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
0
3
1.2
50
V
V
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Pout <= max rated power
Pout ≦ max rated power
Over full temp range
0
3
1.2
50
1
50
3.63
10
4.62
V
V
mA
µA
V
%
V
Io=80% of Io, max; Ta=25°C
Please refer to Fig.21 for measuring point
2.64
3.89
4.5
75.4
127
M hours
grams
°C
H48SC3R325_07122011
2
ELECTRICAL CHARACTERISTICS CURVES
8
94
92
7
90
6
86
LOSS(W)
EFFICIENCY(%).
88
84
82
5
4
36V
80
3
48V
78
36V
75V
76
48V
2
75V
74
1
72
3
5
7
9
11
13
15
17
19
21
23
25
OUTPUT CURRENT(A)
3
5
7
9
11
13
15
17
19
21
23
25
OUTPUT CURRENT(A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
2.8
INPUT CURRENT(A)
2.4
2.0
1.6
1.2
0.8
0.4
0.0
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE(V)
Figure 3: Typical input characteristics at room temperature
H48SC3R325_07122011
3
ELECTRICAL CHARACTERISTICS CURVES
For Positive Remote On Logic
Figure 4: Turn-on transient at full load current (resistive load)
(10ms/div). CH2: Vout: 2V/div; CH4: ON/OFF input: 5V/div
Figure 5: Turn-on transient at minimum load current
(10ms/div). CH2: Vout: 2V/div; CH4: ON/OFF input: 5V/div
For Vin turn On Logic
Figure 6: Turn-on transient at full load current (resistive load)
(10ms/div). CH2 Vout: 2V/div; CH1:Vin: 20V/div
Figure 7: Turn-on transient at zero load current (10ms/div).
CH2 Vout: 2V/div; CH1:Vin: 20V/div
H48SC3R325_07122011
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt =0.1A/µS). Load cap: 10uF
Low ESR capacitor and 1µF ceramic capacitor. Top Trace: Vout
(50mV/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 9: Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µS). Load cap:10uF
Low ESR capacitor and 1µF ceramic capacitor. Top Trace: Vout
(50mV/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 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 220µF electrolytic capacitor (0.1A/div).
H48SC3R325_07122011
5
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 12: Output voltage noise and ripple measurement test
setup
Figure 13: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load
current (5mA/div)
4.0
3.5
OUTPUT VOLTAGE(V
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (10mV/div). Load capacitance: 1µF ceramic
capacitor and 10µFlow ESR 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.
8
11
14
17
20
23
OUTPUT CURRENT(A)
26
29
32
35
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
H48SC3R325_07122011
6
DESIGN CONSIDERATIONS
Š
The input source must be insulated from the ac
mains by reinforced or double insulation.
Š
The input terminals of the module are not operator
accessible.
Š
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.
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 220 to 470 µF electrolytic
capacitor (ESR < 0.1 Ω at 100 kHz) mounted close to
the input of the module to improve the stability.
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.
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 the input source is SELV, 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:
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
normal-blow fuse with (TBD) A 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.
H48SC3R325_07122011
7
FEATURES DESCRIPTIONS
Vi(+)
Over-Current Protection
Sense(+)
The module provides two over current protection levels.
When the output current exceeds the low current limit
level, the module will endure current limiting till the
output voltage is lower than 0.2V. If the output current
exceeds the high current limit level, the module will shut
down immediately.
The modules will try to restart after shutdown (hiccup
mode). If the overload condition still exists, the module
will shut down again. This restart trial will continue until
the load condition is corrected.
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.
The modules will try to restart after shutdown (hiccup
mode). If the over voltage still exists, the module will
shut down again. This restart trial will continue until the
voltage condition is corrected
ON/OFF
Sense(-)
Vi(-)
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).
Vi(+) Vo(+)
Sense(+)
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.
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 logic low and off during logic high.
Positive logic turns the modules on during logic high and
off during logic low.
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 to floating.
Vo(-)
Figure 16: Remote on/off implementation
Over-Temperature Protection
The module will try to restart after shutdown. If the
over-temperature condition still exists during restart, the
module will not start up. This restart trial will continue
until the temperature is within specification.
Vo(+)
Sense(-)
Contact
Resistance
Vi(-)
Vo(-)
Contact and Distribution
Losses
Figure 17: 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.
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.
H48SC3R325_07122011
8
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 19: Circuit configuration for trim-up (increase output
voltage)
Figure 18: Circuit configuration for trim-down (decrease
output voltage)
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:
Rtrim down=
 100 − 2 ΚΩ

 ∆

Ex. When Trim-down 10% (3.3V×0.9=2.97V)
Vo := 3.3 V
100
∆
∆ := 10
− 2 = 8 KΩ
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= 

Vo⋅ ( 100 + ∆ )
1.225⋅ ∆
−
100 + 2∆ 
∆


ΚΩ
Ex. When Trim-up +10%(3.3V×1.1=3.63V)
Vo := 3.3 V
Vo ⋅ ( 100 + ∆ )
1.225 ⋅ ∆
∆ := 10
−
100 + 2 ⋅ ∆
∆
= 17.633
KΩ
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?
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
H48SC3R325_07122011
9
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.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Derating
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.
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 21: Temperature measurement location
The allowed maximum hot spot temperature is defined at 116℃
PWB
FACING PWB
H48SC3R325(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Either Orientation)
Output Current (A)
MODULE
25
Natural
Convection
20
15
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
10
50.8 (2.0”)
AIR FLOW
5
0
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 20: Wind Tunnel Test Setup
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output current vs. ambient temperature and air
velocity @ Vin=48V (Either Orientation)
H48SC3R325_07122011
10
MECHANICAL DRAWING
Pin No.
1
2
3
4
5
6
7
8
9
Name
+Vin
ON/OFF
CASE
-Vin
-Vout
-SENSE
TRIM
+SENSE
+Vout
Function
Positive input voltage
Remote ON/OFF
Case ground
Negative input voltage
Negative output voltage
Negative remote sense
Output voltage trim
Positive remote sense
Positive output voltage
Pin Specification:
Pins 1-4, 6-8
Pins 5 & 9
1.00mm (0.040”) diameter
2.00mm (0.079”) diameter
All pins are copper with Tin plating.
H48SC3R325_07122011
11
PART NUMBERING SYSTEM
H
48
S
Form
Input Number of
Factor Voltage Outputs
H- Half
Brick
48 36~75V
S- Single
C
3R3
25
P
S
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length
C- Low Power 3R3- 3.3V
25- 25A
P- Positive
F
S- 0.19”
A
Option Code
F- RoHS 6/6
(Lead Free)
A- Standard
Functions
MODEL LIST
MODEL NAME
H48SC3R325PSFA
INPUT
36V~75V
OUTPUT
3.0A
3.3V
EFF @ 100% LOAD
25A
93%
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107
ext 6220~6224
Fax: +886 3 4513485
Email: [email protected]
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.
H48SC3R325_07122011
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