300W DIP Type High Input DC/DC Converter : DHHB300

DHHB300 - 300 Watts Half Brick Type 2:1 High Input Voltage Isolated DC - DC Converters


Regulated Output DC-DC Converter- Isolation - Module

Our DHHB300 series is high efficiency 300W isolated and regulated output. The dimension is 2.28" x 2.4" x 0.5" meet industrial standard half brick size. They provide a 300Vdc nominal input (with an input range of 180 to 425Vdc) and 3000VAC reinforced isolation, which are suitable for distributed power architectures, telecommunications, servers, base station, battery operated equipment, and industrial applications.
  • Efficiency Up to 90%
  • Fixed Switching Frequency
  • Regulated Outputs
  • Remote On/Off
  • Low No Load Power Consumption
  • Fully Protected (OTP/OCP/OVP/UVLO)
  • 3000Vac I/O Isolation
  • Operating Case Temperature -40 to +100℃
  • -55℃ Operating Available
  • Quarter Brick Size Meet Industrial Standard 2.28" x 2.4" x 0.5"
  • Shock & Vibration MIL-STD-810F Compliant
  • Fire & Smoke EN45545 Compliant
  • 2000m Operating Altitude
Input Voltage Range Nominal 300V Range: 180-425V
Undervoltage Lockout 300Vin power up ... 170V ; power down ... 160V
Logic Remote On/Off open collector refer to - Input
Positive Remote Logic.
Logic Low Module OFF .................< 1.2V
Logic High (Module ON).................. Open circuit or 3.5~75V
Negative Remote Logic.
Logic High (Module OFF)................. Open circuit or 3.5~75V
Logic Low Module ON .................< 1.2V
Input Filter PI Type
Voltage Accuracy ± 1% max
Transient Response 25% step load change ... < 250 µs
External Trim Adj. Range(Refer toMechanical Drawing Figure1 and Figure2) +10%, -20%
R&N 20MHz BW (note3) 5V ................. 60mV RMS max., 120mV pk-pk max.
12V ............... 60mV RMS max., 150mV pk-pk max.
24V ............. 120mV RMS max., 240mV pk-pk max.
28V ............. 150mV RMS max., 280mV pk-pk max.
48V ............. 200mV RMS max., 480mV pk-pk max.
Temperature Coefficient ± 0.02% / °C max.
Short Circuit Protection Continuous
Line Regulation(note1) ± 0.2% max
Load Regulation(note2) ± 0.2% max
O.V.P. Trip Range, %Vo nom. 115% ~ 140%
Current Limit 105% ~ 140% Nominal Output
Start up Time 300ms typ.
Isolation Voltage Input/Output : 3000VAC min.
Input/Case : 2500VAC min.
Output/Case : 500VAC min.
Isolation Resistance 100M Ω min.
Switching Frequency 300 KHz Tpy.
Operating Case Temperature -40°C to 100°C
Storage Temperature -55°C to 105°C
Thermal Shutdown, Case Temp. 105°C Typ.
Humidity 95% RH max. Non Condensing
MTBF MIL-HDBK-217F, GB, 25℃, Full Load … 5V... 470Khrs typ.; 12V... 590Khrs typ.;Others … 760Khrs typ.
Dimensions 2.28×2.40x0.50 inches (57.9x61.0×12.7 mm)
Case Material Aluminum Base Plate with Plastic Case
Weight 90g

Model No. I/P Vol. O/P Vol. O/P Current O/P Watts (max.)
DHHB300-C1xyz 180-425 VDC 5.00V 60.0A 300W
DHHB300-C2xyz 180-425 VDC 12.0V 25.0A 300W
DHHB300-C9xyz 180-425 VDC 24.0V 12.5A 300W
DHHB300-C9Cxyz 180-425 VDC 28.0V 10.7A 300W
DHHB300-C9Bxyz 180-425 VDC 48.0V 6.25A 300W

Ordering Information:

  1. x = blank stands for Remote On/Off Logic Positive
    x = N stands for Remote On/Off Logic Negative
    y = blank stands for M3.5x0.5 mounting inserts
    y = C stands for Clear mounting insert (3.2mm DIA)
    z = blank stands for -40~105℃ operating temp.
    z = L stands for -55~105℃ operating temp.
  2. Nominal input voltage 300VDC.
    Measured at nominal input voltage.
  3. An external input capacitor 33uF for all models are recommended to reduce input ripple voltage.
  4. -55°C start-up screen per MIL-STD105E S1 Sampling Procedure for L Version.
Mechanical Drawing (Unit: mm)


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