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350-W Half-brick
Dec 2009
Power-OneRequest Info
Pinout DC/DC Converter
CAMARILLO, Calif., Dec. 31, 2009 – Power-One Inc. has launched the HBA48T12280, an efficient 350-W half-brick pinout DC/DC converter for use in cellular infrastructure, wireless communications, telecommunications and radio-frequency amplifier applications. It has a smooth efficiency curve that equals or exceeds 90% for loading conditions ranging from 40% to 100%. Its ultrawide trim range enables it to operate from a 21- to 33-VDC output range and renders it suitable for use across a multitude of radio frequency amplifier technologies. It delivers up to 12.5 A of output current and requires no minimum load.

PowerOne_HalfBrick.jpgAdditional features include a 36- to 75-VDC input range, a -40 to 100 °C operating temperature range, ability to withstand a 100-V input transient for 100 ms, ability to start up into prebiased loads and an onboard input differential LC (inductor/capacitor) filter. The converter has an industry-standard half-brick footprint measuring 61 × 57.9 mm and a low profile of 12.7 mm high. It is RoHS-compliant for all six substances.

The open-frame converter module is constructed with a dual-board approach using discrete magnetics. The remote sense feature compensates for voltage drops occurring between the output pins of the converter and the load.

Protections include: output overvoltage and overcurrent shutdown, input undervoltage lockout and overtemperature shutdown with hysteresis. Interface and trim capabilities include: remote on/off (positive or negative logic option) and 18% to -25% output voltage trim ranges with industry-standard trim equations. Safety approvals include UL60950-1/CSA 22.2 No. 60950-1, EN60950-1 and IEC60950-1.

For more information, visit:  

Power-One Inc.
740 Calle Plano
Camarillo, CA 93012-8583
Phone: (805) 987-8741


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This term literally means "to lag behind.'' It is quite often used to describe the residual effect that remains after the primary effect has been removed, or the lag that exists between the responding parameter and the changing parameter; can be seen in stress-strain and magnetizing force-magnetic field relationships.
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