PIONEER MAGNETICS HYRSP-1500-56 | 56V 27A Power Module, Available

Description

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PIONEER MAGNETICS HYRSP-1500-56

PIONEER MAGNETICS HYRSP-1500-56

Key Technical Specifications

Product Introduction

The PIONEER MAGNETICS HYRSP-1500-56 is a high-power, regulated switching power supply capable of delivering 1500W at 56V DC. It is built for demanding industrial, telecom, and data center environments where clean, stable DC power is critical—not a commodity computer supply. The module accepts a nominal 300V DC input (typical of a -48V telecom rectifier farm) or a 180–264V AC input, depending on the specific variant, and outputs a tightly regulated 56V bus that powers server racks, high-power amplifiers, RF transmitters, or motor drives.

What sets the HYRSP-1500-56 apart is the rugged construction and thermal management. The unit uses a full-bridge topology with synchronous rectification, achieving over 91% efficiency even at 50% load, which translates to less wasted heat in a packed cabinet. The 56V output sits above the standard 48V telecom voltage but below the 60V SELV limit, making it a sweet spot for power-over-distributed systems where voltage drop on long cables matters. The remote sense function compensates for up to 0.5V of cable loss, ensuring the end device sees a steady 56V.

PIONEER MAGNETICS HYRSP-1500-56

Application Scenarios & Field Experience

Part 1 – Narrative Paragraph

The frustrating reality in high-power DC distribution is that a single failed rectifier can cascade into a complete system shutdown if the power architecture doesn’t have the right redundancy or the supply lacks proper fault isolation. I have seen RF amplifier bays go dark because one power supply shorted its output and dragged down the entire 56V bus. The HYRSP-1500-56 addresses that with active current sharing for parallel operation and a fast-acting crowbar overvoltage protection that latches off internally without choking the bus. The constant-current overcurrent limiter means you can plug in a shorted load and the supply will fold back to safe current levels instead of blowing internal fuses—then recover automatically once the fault is removed.

Part 2 – Numbered List (Application Scenarios)

1. Telecom – Remote Radio Head (RRH) Powering – The HYRSP-1500-56 feeds 56V DC to remote radio units on cell towers. The -20 °C start-up capability ensures reliable cold-starts in northern climates, and the 100 mVpp ripple stays within the RF amplifier’s noise floor.
2. Broadcast – High-Power FM / TV Transmitters – The module provides regulated 56V to the final-stage LDMOS amplifiers. The 27A current capacity drives multiple transmitter modules, and the remote sense corrects for drops in the long DC feed lines from the rectifier room.
3. Data Center – 56V Busbar Power Distribution – Used as a hot-swappable power shelf module in data centers that have migrated to 56V distribution for higher efficiency. The 91%+ efficiency reduces the cooling load, and the active current sharing allows N+1 redundancy.
4. Industrial Motor Drives – The HYRSP-1500-56 powers the control electronics and DC bus of low-voltage servo drives in packaging and material handling machinery. The hold-up time of 20 ms prevents nuisance resets when the facility’s AC supply dips.

Part 3 – Short Field Story

A broadcast transmitter site in the Rocky Mountains had a 56V power shelf that was failing intermittently—every time the backup diesel generator did its weekly test, the voltage would dip and the two 1.5kW transmitters would reset, taking the station off-air for 90 seconds. After checking the generator response, we traced the issue to the existing power supplies having only 8 ms of hold-up. We swapped in two units configured in N+1 redundancy. The next generator test showed a steady 56V bus throughout the transfer. The chief engineer sent us a photo of the log—zero transmitter resets.

PIONEER MAGNETICS HYRSP-1500-56

PIONEER MAGNETICS HYRSP-1500-56

Standard Operating Procedure (SOP) for Quality Control

Every undergoes this heavy-duty QC process before shipment:

• Visual & Origin Inspection – We verify the Pioneer Magnetics label, the serial number, and the date code. We check for signs of prior repair, re-soldered terminals, or conformal coating irregularity. Any unit with a cracked fan blade or bent mounting flange is rejected.
• Input Surge & Inrush Current Test – The module is powered up through a variac. We measure the inrush current—if it exceeds the datasheet limit (typically < 40A peak), we replace the soft-start thermistor.
• Voltage Accuracy & Trim Adjustment – We set the output to 56.0V at no load, then at full load. If the voltage drifts outside 56.0V ± 0.5%, we adjust the trim pot. We document the final trim setting.
• Load Regulation Test – We apply a stepped load from 10% to 100% (2.7A to 27A) and back down, measuring the output voltage deviation. The transient response must settle within 2% of setpoint in under 500 µs.
• Ripple & Noise Measurement – With a 20MHz bandwidth oscilloscope and a differential probe, we measure ripple at 50% load and 100% load. It must stay below 100 mVpp. We also test the remote sense loop by adding 0.5V of simulated cable drop.
• Protection Circuit Verification – We short the output terminals through a calibrated shunt to verify the current limit engages between 110% and 130% of rated current. We then force an overvoltage condition to test the crowbar latch-off. We let the unit cool and verify auto-recovery for overcurrent (thermal shutdown requires baseplate cooling).
• Thermal Soak & Fan Test – The unit runs at 75% load for 2 hours in a 45 °C chamber. We monitor internal temperature sensors and confirm the fan ramps up correctly. We also log the efficiency during this period—it must stay above 89%.
• ESD-Safe Packaging – The module is wrapped in anti-static film, placed in fitted foam, and secured inside a double-walled carton with “Heavy-Duty” handling labels. The terminals are covered with protective insulating caps.

Frequently Asked Questions (FAQ)

Q1: Is the an AC-input or DC-input unit? I see conflicting specs online.

A: There are multiple variants under the part number. Check the nameplate on your specific unit. The most common variant accepts 180–264V AC (single-phase). A second variant accepts 300–400V DC input for integration into a -48V telecom rectifier system. A third, rarer variant is a DC-DC converter accepting 100–150V DC. Always verify the label—if it says “AC-DC,” it is AC input. If it says “DC-DC,” it expects the higher-voltage DC bus. Connecting 240V AC to a DC-DC variant can destroy the input stage. We ship with a label highlighting the input voltage range.

Q2: Can I parallel multiple units for redundancy?

Yes, but with a catch. The units support active current sharing (pin 6 on the control connector). However, for true N+1 redundancy and fault isolation, you must place external Schottky OR-ing diodes on the output of each unit. If one supply fails short, the OR-ing diode isolates it. Without the OR-ing diodes, a failed unit can drag down the bus and potentially backfeed into the other supplies. We recommend using external diode modules rated for 30A at 60V.

Q3: The unit has a remote on/off pin. What signal does it take?

A: The remote on/off is TTL-compatible. A low signal (0–0.8V) or an open circuit enables the output. A high signal (2.4–5V) or grounding to 5V disables the output. Do not exceed 5V on this pin—it is not 24V-tolerant. If you are not using remote on/off, leave it open (internal pull-up enables the output by default).

Q4: My system runs on 48V, not 56V. Can I adjust the output down to 48V?

A: The trim range is typically ±4% (52V to 58V). You cannot trim down to 48V reliably—the internal control loop loses regulation below about 52V. If you need 48V, order the HYRSP-1500-48 variant. Running a 56V unit at 48V will cause the undervoltage protection to trip or the output to become unstable.

Q5: What is the warranty, and what does it cover on a high-power unit like this?

A: We offer a 12-month warranty covering failure to regulate, output voltage loss, overvoltage clamping, and input-stage failure under normal operating conditions. The warranty does not cover fan wear (fans are consumables—we recommend replacing them every 2–3 years), water ingress, or damage from input overvoltage (e.g., connecting 480V AC to the input). We also do not cover reverse polarity on the DC input or output. If a unit fails on our test bench after we ship it, we replace it—but we have shipped hundreds of these and have a <0.5% field return rate.

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