B70SR24125A/B/C/D - Delta Electronics

B70SR24125A/B/C/D
24V Output DC/DC Converter, Box Type Package
FEATURES

Wide input voltage range, 36~106V

300W Output

Full Load Efficiency up to 92.5% @48Vin;
[email protected]

Parallel Connection of multiple units

Box type package with metal base plate

Package Dimension:
190.0x76.0x44.0mm (7.48”x2.99”x1.73”)

Operating Temperature Range - 40°C to +75°C

Intergrated fuseholder (option)

Input Reverse Polarity Protection

Minimized Inrush current

Input UVLO, Output OCL, Short circuit protection,
OVP, OTP

Enable on/off (option)

1500Vac Isolation

IP67 Protection

RoHs Compliant

ISO 9001, ISO 14001 certified manufacturing facility

UL60950-1

CE Mark

EMC compatible: EN12895, CISPR11 ClassA

Electrical transient conduction: ISO7637-2
The B70SR24125, a wide input voltage range of 36~106V, and single isolated output converter, is the latest product offering from a world
leader in power systems technology and manufacturing ― Delta Electronics, Inc. Such box type DCDC converter can provide 300W, 24V
regulated DC output voltage with full load efficiency up to 92.5% @72Vin; The B70SR24125 offers input UVLO, output over current limit,
short circuit, output over voltage, over temperature, and input reverse polarity protections, It has an option for intergrated fuse holder and
enable on/off function. It also has parallel function; and allows a wide operating temperature range of –40°C to +75°C. With creative design
technology and optimization of component placement, this converter possess outstanding electrical and thermal performance, as well as high
reliability under extrmely harsh operating conditions. The B70SR24125 meet IP67 protection(refer to “water protection level” specification)
Input Characteristics
Item
Condition
Continuous Input Voltage
Max Input voltage
Min.
Typ.
Max.
Unit
36
72
106
VDC
126
VDC
10 minutes, normal operating
Input Under-Voltage Lockout, Turn-On
33
34
35
VDC
31
32
22
VDC
Lockout Hysteresis Voltage
1
2
3
VDC
Enable logic turn on
20
Voltage Threshold
Input Under-Voltage Lockout, Turn-Off
Voltage Threshold
VDC
Enable logic turn off
Max Input Current
Reflected input ripple current
No-Load Input Current
Off converter input current
Vin=36V, 100% Load
9.3
Vin=72V, Vpp
10
A
0.2
A
Vin=48V
30
50
mA
22
40
mA
Vin=72V
8
Max Inrush current
DS_B70SR24125_01092014
VDC
Vin=72V, 80V
Max Reverse Polarity Input Voltage
Internal Input Fuse
5
Ø 6.35mm*31.75mm
250V/15A Fast-acting fuse
15
mA
106
VDC
10
A
A
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Output Characteristics
Item
Operating Output Current Range
Conditions
Output Voltage Set Point
Output Voltage Ripple and Noise,
Maximum Output Capacitance
Output overshoot
Efficiency @ 100% Load
Efficiency @ 100% Load
Efficiency @ 100% Load
Io=12.5A
24.2
Vin=48V, Io=12.5A, peak to peak,
20MHz bandwidth
RMS
Vin=72V, 80V, Io=12.5A, peak to peak,
20MHz bandwidth
RMS
Output Current Limit
Current share accuracy
Start-up time from input
Start-up time from enable
Rise time
Output Voltage Protection
Output Voltage Current Transient
Typ.
Io=0
Min.
0
24.7
13
12.5A for each module
27
Positive voltage step, 9.375A to 6.25A load
dynamic, 0.1A/us slew rate
Nagetive voltage step, 6.25A to 9.375A load
dynamic, 0.1A/us slew rate
ESR>10mohm
25
Max.
12.5
25.3
Unit
A
V
24.5
24.8
V
100
150
mV
25
40
mV
130
200
mV
35
14.5
8
700
400
130
29
50
16
12
1000
600
200
31
mV
A
%
mS
mS
mS
V
100
200
mV
100
200
mV
5000
3
Vin=48V
Vin=72V
Vin=80V
90.5
90.5
90.5
92.5
92.5
92.5
µF
%
%
%
%
Efficiency @ 60% Load
Vin=48V
91.0
93.0
%
Efficiency @ 60% Load
Vin=72V
91.0
93.0
%
Efficiency @ 60% Load
Vin=80V
91.0
93.0
%
Conditions
Min.
Typ.
General Characteristics
Item
Unit
1500
500
VAC
VAC
MΩ
pF
KHz
Mhours
g
Min.
Max.
Unit
-40
-40
+125
+75
℃
℃
℃
% rel. H
Input to Output, Input to Case
Ouput to Case
Isolation Voltage,
Isolation Resistance, Input to Output
Isolation Capacitance, Input to Output
Switching Frequency
MTBF
Weight
Max.
10
5000
175
1.536
900
Ta=25ºC, 80%load
Environmental Specifications
Parameter
Storage Temperature Range
Operating Temperature Range
Over Temperature Protection
Humidity (non condensing)
Water Protection Level
Vibration
Shock
Emission
Immunity
ESD
Conditions
Ambient Temperature
NTC Temperature
118
95
With connector&fuseholder for B
Without connector&fuseholder for A/C/D
IEC 60068-2-6
IEC 60068-2-27
EN12895
EN12895, EN61000-4-3
EN12895, EN61000-4-2
IP67
10G/15~200HZ/3 PLANES
50G 3 PLANES
30-1000MHz 34-45dBuV/m
10V/m /27-1000MHz AM; 10V/m /900MHz PM
Direct: ±2KV ±4KV; Air: ±2KV ±4KV ±8KV
Notes
1
2
Specifications typical at Ta=+25℃, nominal input voltage and rated full load output current unless otherwise noted.
Specifications are subject to change without notice.
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ELECTRICAL CURVES
Figure 1: Efficiency vs. Output current
@ Vin=48V,72V,80V
Figure 2: Vout vs. Vin @ Full load
Figure 3: Input current vs. Input voltage
@ Full load
Figure 4: Output voltage vs. Output current
OCL Performance @72Vin
Figure 5: Output voltage vs. Output current
@Vin=72V. Droop function.
DS_B70SR24125_01092014
Figure 6: Current share accuracy vs. Total output current
2 in parallel.
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ELECTRICAL CURVES (continous)
Figure 7: Dynamic response to load step 6.25A~9.375A
with 0.1A/uS slew rate at 72Vin
CH1:VOUT, 100mV/div, 500uS/div
Figure 8: Vout start up with Enable on at 72Vin,12.5A Iout,
TOP:Enable, 50V/div, 100mS/div
BOTTOM: VOUT, 10V/div, 100mS/div
Figure 9: Output ripple & noise at 72Vin, 24A Iout
CH1:VOUT, 50mV/div, 5uS/div
Figure 10: Output over voltage protection at 72Vin, 24A Iout
CH1:VOUT, 20V/div, 50mS/div
Figure 11: Inrush current @ Vin=72V
CH1:Iin, 2A/div, 200nS/div; Max current 4.3A, I2t=1.5E-7
A²S
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FEATURES DESCRIPTIONS
Output Over-Current Limit and Short Protection
The modules include internal output over-current limit (OCL) and short circuit protection (SCP) circuits, the
OCL set point is lower than that of the SCP; The response of SCP circuit is much fast than that of the OCL
circuit. The slowly increase of the output current will let module enter OCL protection when the current exceeds
the OCL set point, while the fast increase of the output current will let module enter SCP when the current
exceeds the SCP set point.
When the modules enter OCL protection, the output voltage will decrease while the output current is kept
constant, the output voltage will soft start to set point when the overload condition is removed.
The module will enter hiccup mode when it triggers the SCP set point. The module 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 removed.
Output Over-Voltage Protection
The power module includes an internal output over-voltage protection(OVP) circuit, which monitors the voltage
on the output terminals. If this voltage exceeds the OVP set point, the module will shut down, and then restart
after a fixed delay time (hiccup mode), please refer to figure6 for detail.
Over-Temperature Protection
The over-temperature protection consists of circuitry that provides protection from thermal damage. If the
temperature exceeds the preset temperature threshold the module will shut down,and all components will not
exceed their absolute maximum temperature ratings.The module will restart after the temperature is within
specification.
Enable On/Off
B70SR24125C has Enable control function. This Enable PIN is designed on the primary side of converter, the
converter will turn on when the Enable PIN connected to VIN+, and turn off when the Enable PIN connected to
VIN- or floating.
.
B70SR24125C
Enable
VIN+
VINVo+
Vo-
Figure 12: suggested Enable connection
Input Reverse Voltage Protection
The input reverse voltage protection is provided by an diode on the input line, the standoff voltage for the
reverse protection shall be no less than -106V.
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DESIGN CONSIDERATIONS
Parallel connection of multiple units
Two units parallel operation is verified, please contact Delta if more than two units need to be paralleled.
While parallelling multiple units, the impedance of the cables from unit to junction point of each unit should be
within ±5% of each other.
Unit1
Unit1
Load
Unit2
Load
Unit2
Figure 13: suggested parallel connections
EMC
The converter has the internal EMI filters and meet the EMC standards EN12895 30-1000MHz
34-45dBuV/m.The test result is showed as below
Conditions: Vin=72V, Io=12.5A, 10m measure distance
Figure 14: test result(Vertical)
Figure 15: test result(Horizontal)
Fuse replacement
For the versions with the intergratted the fuse holder, when the fuse needs to be replaced, it can be taked down
in an anticlockwise direction by slotted type screwdrivers .
Recommended fuse replacement P/N:
Littlefuse 0314015.MXP
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THERMAL CONSIDERATION
The thermal curve (Figure17~19) is based on a 250x300x5 AL table, shown as below figure.
Figure 16: Thermal consideration
THERMAL CURVE
AOS
Figure 17: Output Current vs. ambient temperature
DS_B70SR24125_01092014
@Vin=48V
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THERMAL CURVES
AOS
Figure 18: Output Current vs. ambient temperature
@Vin=72V
AOS
Figure 19: Output Current vs. ambient temperature
DS_B70SR24125_01092014
@Vin=80V
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THERMAL CONSIDERATION
The following figure shows the location to monitor the temperature of base plate. Before customer decides to
use this DCDC converter, a thermal evaluation need to be done to make sure the temperature of base plate is
lower than that read from below thermal curves (Figure21~23 base on different input voltage).
Figure 20: Thermal test setsup
THERMAL CURVE
AOS
Figure 21: Output Power vs. base plate temperature @Vin=48V
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THERMAL CURVES
AOS
Figure 22: Output Power vs. base plate temperature @Vin=72V
AOS
Figure 23: Output Power vs. base plate temperature @Vin=80V
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)

Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-4213)
B70SR24125A
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)

Connector:
MOLEX MINI-FIT SrTM Header
X.XX±0.25 ( X.XXX±0.010)
(MOLEX P/N :42819-4213)

B70SR24125AC
DS_B70SR24125_01092014
Connector kit :
Housing: 42816-0412
Terminal: 42815-0042
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)

Connector:
Deutsch DTP Receptacles
X.XX±0.25 ( X.XXX±0.010)
B70SR24125B
(DEUTSCH P/N :DTP04-4P)
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)

Connector:
Deutsch DTP Receptacles

Connector kit :
Housing: DTP06-4S
Wedge lock: WP-4S
Terminal: 0462-203-12141
X.XX±0.25 ( X.XXX±0.010)
(DEUTSCH P/N :DTP04-4P)
B70SR24125BC
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
5
ENABLE

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
 Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-5213)
B70SR24125C
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +
5
ENABLE

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)

Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-5213)

B70SR24125CC
DS_B70SR24125_01092014
Connector kit :
Housing: 42816-0512
Terminal: 42815-0042
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Mechanical Drawing
Mechanical Dimensions
Pin Connections
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
 Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-4213)
B70SR24125D
Pin
Function Description
1
OUTPUT -
2
OUTPUT +
3
INPUT -
4
INPUT +

All dimensions in mm (inches)

Tolerance:X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
 Connector:
MOLEX MINI-FIT SrTM Header
(MOLEX P/N :42819-4213)

B70SR24125DC
Connector kit :
Housing: 42816-0412
Terminal: 42815-0042
Physical Outline
Case Size
Case Material
DS_B70SR24125_01092014
:
:
190.0x76.0x44.0 mm (7.48”x2.99”x1.73”)
Case: PC; Plate: AL6063
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Part Numbering System
B
70
S
R
24
125
C
Form
Factor
Input
Voltage
Number
of
Outputs
Product
Series
Output
Voltage
Output
Current
Option Code
BBox
70 –
36V~106V
S–
Single
R–
Regular
24 –
24V
125 –
12.5A
C
Option
Fitting
With
Built-in
fuse
holder
Enable
pin
Sealed
connector
& fuse
holder
Connector Kit
A
YES
NO
NO
1xhousing+ 4 terminals
B
YES
NO
YES
1xhousing+ 4 terminals
C
NO
YES
NO
1xhousing+ 5 terminals
D
NO
NO
NO
1xhousing+ 4 terminals
Model List
Input Voltage Range
B70SR24125(A\B\C\D)
Input
36V~106V
EFF @72VIN 100%
LOAD
Output
10A
24V
12.5A
92.5%
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
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) years 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.
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