Datasheet

ManualsBrandsDELTA ELECTRONICS ManualsPSU ComponentsDC/DC converter (component) 12.4 Vdc 24 A 300 W No. of outputs: 1 x

B70SR12424A

12V Output DC/DC Converter, Box Type Package

DS_B70SR12424A_05232013 E-mail DCDC@delta.com.tw

http://www.deltaww.com/dcdc

FEATURES

 Wide input voltage range, 36~106V

 300W Output

 Full Load Efficiency up to 89.5% @48Vin;

90%@72Vin

 Intergrated fuse holder

 Parallel Connection of multiple units

 Box type package with metal base plate

 Package Dimension:

190.0x76.0x43.5mm (7.48”x2.99”x1.71”)

 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

 RoHs Compliant

 ISO 9001, ISO 14001 certified manufacturing facility

 UL60950

 CE Mark

 EMC compatible: EN12895

 Electrical transient conduction: ISO7637-2

The B70SR12424A, 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 B70SR12424A offers input UVLO, output over current

limit, short circuit, output over voltage, over temperature, and input reverse polarity protections, It has an intergrated fuse holder. 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 B70SR12424A meets IP67 protection (not include the connector and fuseholder).

Input Characteristics

Item

Condition

Min.

Typ.

Max.

Unit

Continuous Input Voltage

106

VDC

Max Input voltage

10 minutes, normal operating

126

VDC

Input Under-Voltage Lockout, Turn-On

Voltage Threshold

VDC

Input Under-Voltage Lockout, Turn-Off

Voltage Threshold

VDC

Lockout Hysteresis Voltage

VDC

Maximum Input Current

Vin=36V, 100% Load

9.2

No-Load Input Current

Vin=48V

Vin=72V, 80V

Reflected input ripple current

Vin=72V, Vpp

0.2

Max Reverse Polarity Input Voltage

106

VDC

Max Inrush current

Internal Input Fuse

Ø 6.35mm*31.75mm

250V/25A Fast-acting fuse

Summary of content (10 pages)

PAGE 1
B70SR12424A 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  Parallel Connection of multiple units  Box type package with metal base plate  Package Dimension: 190.0x76.0x43.5mm (7.48”x2.99”x1.
PAGE 2
Output Characteristics Item Operating Output Current Range Conditions Output Voltage Set Point Output Voltage Ripple and Noise, Output Current Limit Short current Current share accuracy Start-up time 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 12.6 Max. 24 12.8 Unit A V Io=24A 12.0 12.2 12.
PAGE 3
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.
PAGE 4
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: Output short current @Vin=72V CH1:Io, 20A/div, 200mS/div DS_B70SR12424A_05232013 Figure 12: Inrush current @ Vin=72V CH1:Iin, 2A/div, 200nS/div; Max current 4.3A, I2t=1.5E-7 A²S E-mail DCDC@delta.com.
PAGE 5
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.
PAGE 6
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 Load Unit2 Unit2 Figure 14: suggested parallel connections EMC The converter has the internal EMI filters and meet the EMC standards EN12895 30-1000MHz 34-45dBuV/m.
PAGE 7
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 did to make sure the temperature of base plate is lower than that read from below thermal curves (Figure18~20 base on different input voltage). Figure 17: Thermal consideration THERMAL CURVE AOS Figure 18: Output Current vs. base plate temperature DS_B70SR12424A_05232013 @Vin=48V E-mail DCDC@delta.com.tw http://www.
PAGE 8
THERMAL CURVES AOS Figure 19: Output Current vs. base plate temperature @Vin=72V AOS Figure 20: Output Current vs. base plate temperature DS_B70SR12424A_05232013 @Vin=80V E-mail DCDC@delta.com.tw http://www.deltaww.
PAGE 9
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: MOLEX MINI-FIT SrTM Header X.XX±0.25 ( X.XXX±0.010) (MOLEX P/N :42819-4213) Physical Outline Case Size Case Material : : DS_B70SR12424A_05232013 190.0x76.0x43.5 mm (7.48”x2.99”x1.71”) Case: PC; Plate: AL6063 E-mail DCDC@delta.com.tw http://www.deltaww.
PAGE 10
Part Numbering System B 70 S R 124 24 A Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current Option Code BBox 70 – 36V~106V S– Single R– Regular 124 – 12.4V 24 – 24A C Option Fitting With Built-in fuse holder Enable pin Sealed connector & fuse holder A YES NO NO B YES NO YES C NO YES NO D NO NO NO Connector Kit 1xhousing+ 4 terminals Model List Input Voltage Range B70SR12424(A\B\C\D) Input 36V~106V EFF @72VIN 100% LOAD Output