B70SR12424A/B/C/D
12V Output DC/DC Converter, Box Type Package
FEATURES
Wide input voltage range, 36~106V
300W Output
Full Load Efficiency up to 89.5% @48Vin;
90%@72Vin
Intergrated fuse holder (option)
Parallel Connection of multiple units
Box type package with metal base plate
Package Dimension:
190.0x76.0x44.0 mm (7.48”x2.99”x1.73”)
Operating Temperature Range - 40°C to +75°C
Input Reverse Polarity Protection
Minimized Inrush current
Input UVLO, Output OCL, Short circuit protection,
OVP, OTP
Enable on/off (option)
2250VDC Isolation
IP67 protection for selective model
RoHs Compliant
ISO 9001, ISO 14001 certified manufacturing facility
UL60950
CE Mark
EMC compatible: EN12895, CISPR11 ClassA
Electrical transient conduction: ISO7637-2
The B70SR12424, 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,
12.4V regulated DC output voltage with full load efficiency up to 90% @72Vin; The B70SR12424 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 B70SR12424 meets IP67 protection (refer to “water protection level” specification).
Input Characteristics
Item
Continuous Input Voltage
Max Input voltage
Input Under-Voltage Lockout, Turn-On
Voltage Threshold
Input Under-Voltage Lockout, Turn-Off
Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off converter input current
Reflected input ripple current
Max Reverse Polarity Input Voltage
Max Inrush current
Internal Input Fuse
Ø 6.35mm*31.75mm
Vin=36V, 100% Load
Vin=48V
Vin=72V, 80V
Vin=72V, enable off (C version)
Vin=72V, Vpp
10 minutes, normal operating
33
34
Condition
Min.
36
Typ.
72
Max.
106
126
35
Unit
VDC
VDC
VDC
31
1
32
2
9.2
35
25
7
33
3
10
60
50
12
0.2
106
10
VDC
VDC
A
mA
mA
mA
A
VDC
A
250V/25A Fast-acting fuse
DS_B70SR12424_12082016
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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Output Characteristics
Item
Operating Output Current Range
Output Voltage Set Point
Conditions
Io=0
Io=24A
Vin=48V, Io=24A, peak to peak,
20MHz bandwidth
RMS
Vin=72V, 80V, Io=24A, peak to peak,
20MHz bandwidth
RMS
25
24A for each module
Vin=48V,full load (for A/B/C/D)
Vin=48V,full load (for C)
13
Positive voltage step, 18A to 12A load
dynamic, 0.1A/us slew rate
Nagetive voltage step, 12A to 18A load
dynamic, 0.1A/us slew rate
ESR>10mohm
Vin=48V
Vin=72V
Vin=80V
Vin=48V
Vin=72V
Vin=80V
Conditions
Input to Output, Input to Case
Ouput to Case
10
5000
175
1.08
900
Min.
-40
-40
122
95
For model P/N with suffix B
IEC 60068-2-6
IEC 60068-2-27
EN12895
EN12895, EN61000-4-3
EN12895, EN61000-4-2
Max.
+125
+75
87.5
88.0
88.0
88.0
88.3
88.3
Min.
Min.
0
12.4
12.0
Typ.
12.6
12.2
100
30
150
50
28
6
500
250
30
15
150
150
Max.
24
12.8
12.4
150
50
200
80
31
10
600
350
50
17
250
250
5000
3
89.5
90.0
90.0
90.0
90.3
90.3
Typ.
Max.
2250
550
Unit
A
V
V
mV
mV
mV
mV
A
%
mS
mS
mS
V
mV
mV
µF
%
%
%
%
%
%
%
Unit
VDC
VDC
MΩ
pF
KHz
Mhours
g
Unit
℃
℃
℃
% rel. H
Output Voltage Ripple and Noise,
Output Current Limit
Current share accuracy
Start-up time(start _up time by Vin)
Start-up time(start _up time by Enable)
Rise time
Output Voltage Protection
Output Voltage Current Transient
Maximum Output Capacitance
Output overshoot
Efficiency @ 100% Load
Efficiency @ 100% Load
Efficiency @ 100% Load
Efficiency @ 60% Load
Efficiency @ 60% Load
Efficiency @ 60% Load
Item
Isolation Voltage,
General Characteristics
Isolation Resistance, Input to Output
Isolation Capacitance, Input to Output
Switching Frequency
MTBF
Weight
Parameter
Storage Temperature Range
Operating Temperature Range
Over Temperature Protection
Humidity (non condensing)
Water Protection Level
Vibration
Shock
Emission
Immunity
ESD
Ta=25ºC, 80%load
Environmental Specifications
Conditions
Ambient Temperature
NTC Temperature
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.
DS_B70SR12424_12082016
E-mail: dcdc@deltaww.com
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ELECTRICAL CURVES
Figure 1:
Efficiency vs. Output current
@ Vin=48V,72V,80V
Figure 2:
Loss vs. Output current
@ Vin=48V,72V,80V
Figure 3:
Dynamic response to load step 12A~18A with
0.1A/uS slew rate at 72Vin
CH1:VOUT, 200mV/div, 200uS/div
Figure 4:
Vout start up with Vin on at
72
Vin,24A Iout,
TOP:VIN, 20V/div, 200mS/div
BOTTOM: VOUT, 5V/div, 200mS/div
Figure 5:
Output ripple & noise at
72Vi
n, 24A Iout
CH1:VOUT,
100m
V/div, 5uS/div
Figure 6:
Output over voltage protectio
n at 72Vin, 2
4A Iout
CH1:VOUT, 10V/div, 50mS/div
DS_B70SR12424_12082016
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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ELECTRICAL CURVES (continous)
Figure 7:
Input current vs. Input voltage
@Full load
Figure 8:
Output voltage vs. Output current
OCL Performance
Figure 9:
Output voltage vs. Output current
@Vin=72V. Droop function.
Figure 10:
Current share accuracy vs. Total output current
2 in parallel.
Figure 11:
Inrush current @ Vin=72V
CH1:Iin, 2A/div, 200nS/div; Max current 4.3A, I2t=1.5E-7
A²S
DS_B70SR12424_12082016
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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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.
Remote On/Of
f
B70SR12424C 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.
.
B70SR12424C
Enable
VIN+
VIN-
Vo+
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.
DS_B70SR12424_12082016
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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