For system integrators, panel builders, and electrical engineers maintaining legacy telecom infrastructure, powering -48V to 200V step-up converters presents a persistent challenge. Traditional -48V telecom rectifiers cannot directly feed 200V transmission equipment, and finding a reliable 200V DC source for testing and validation often means compromising on precision, stability, or safety.
The EA-PSI 9200-25 DT, distributed by TPS Elektronik, is a high-performance programmable bench DC power supply that delivers 0–200V at 0–25A with 1500W total output power. With <9mV RMS voltage ripple, <1.8mA RMS current ripple, and up to 93% efficiency, this 200V power supply is engineered for telecom applications where clean, stable DC power is non-negotiable for legacy base station and transmission equipment validation.
1. The Telecom Challenge: -48V to 200V Step-Up Conversion
Telecommunications infrastructure relies on a -48V DC power distribution standard that has been the industry norm for decades. This standard was originally adopted because -48V systems are safer to work with, less prone to corrosion, and compatible with lead-acid battery backup systems that are ubiquitous in central offices and base stations.
However, many legacy transmission equipment and microwave radio systems require 200V DC input for their RF power amplifiers and signal processing stages. This creates a fundamental voltage mismatch: the -48V bus cannot directly power 200V equipment. The solution is a -48V to 200V step-up converter—a DC-DC boost converter that elevates the -48V bus voltage to the 200V level required by transmission equipment.
For system integrators and electrical engineers, testing and validating these step-up converters demands a 200V telecom power supply that can:
- Simulate the 200V load side of the step-up converter for efficiency testing
- Provide clean, regulated 200V DC for transmission equipment validation
- Deliver stable power under varying load conditions
- Support remote control and automation for production test environments
The EA-PSI 9200-25 DT addresses each of these requirements with a programmable 200V DC output, ultra-low ripple, and comprehensive remote control capabilities—making it an ideal 200V DC power for base station validation and step-up converter testing applications.
TPS Elektronik distributes the EA-PSI 9200-25 DT as part of its programmable power supply portfolio, supporting telecom infrastructure projects across the US and German markets.
2. Product Overview: EA-PSI 9200-25 DT 200V Power Supply
The EA-PSI 9200-25 DT (Order Number: 06200512) is a microprocessor-controlled programmable DC power supply from the EA-PSI 9000 DT series, manufactured by EA Elektro-Automatik and distributed by TPS. It delivers 0–200V DC output voltage, 0–25A DC output current, and up to 1500W output power.
Key features for telecom step-up converter applications:
- Wide AC input range: 90–264V AC with active PFC (PF > 0.99), enabling global deployment
- High efficiency: Up to 93%, reducing energy consumption and heat generation
- Ultra-low output ripple: 60mV PP / 9mV RMS voltage ripple, 1.8mA RMS current ripple
- Built-in discharge circuit: Drops residual voltage below 60V within 10 seconds after output shutdown for safety
- Auto-ranging output: CV/CC/CP/CR four operating modes for flexible testing
- Built-in function generator: Sine, triangle, rectangle, trapezoid, ramp, DIN40839, and arbitrary waveforms
- Comprehensive interfaces: USB-A/USB-B/Ethernet standard onboard + galvanically isolated 15-pin analog interface
- Protocol support: SCPI and ModBus RTU compliant, compatible with EA Power Control software and LabView drivers
The 200V power system telecom applications benefit significantly from the unit’s front USB port, which allows saving and loading user test profiles and arbitrary waveform sequences—streamlining repetitive testing of step-up converters and transmission equipment.
For telecom grade 200V power module testing, the EA-PSI 9200-25 DT provides the precision and programmability that engineers require for both development and production validation.
3. Auto-Ranging Technology for Flexible Telecom Testing
One of the defining features of the EA-PSI 9200-25 DT is its auto-ranging output stage. Unlike traditional power supplies with a fixed voltage-current curve, auto-ranging technology allows the power supply to deliver full rated power across a wide range of voltage and current combinations.
For a 1500W power supply with auto-ranging:
- At 200V, the supply can deliver up to 7.5A (1500W)
- At 100V, the supply can deliver up to 15A (1500W)
- At 60V, the supply can deliver up to 25A (1500W—limited by current)
This flexibility is invaluable for network equipment 200V supply applications where the load may vary significantly. A single power supply can be used to test multiple step-up converters and transmission equipment with different voltage and current requirements, reducing the need for multiple power supplies in the lab or on the production floor.
For microwave transmission 200V power applications, the auto-ranging capability allows the power supply to handle the wide dynamic range of RF power amplifiers and signal processing stages without manual reconfiguration.
The auto-ranging output also supports constant voltage (CV), constant current (CC), constant power (CP), and constant resistance (CR) operating modes, making it suitable for a wide range of telecom testing scenarios—from power supply validation to load simulation.
4. Precision and Stability for Sensitive Transmission Equipment
Telecom transmission equipment—including microwave radios, optical transmission systems, and legacy base station transceivers—demands exceptionally clean and stable DC power. Voltage ripple and noise can degrade signal quality, introduce bit errors, and reduce transmission range.
The EA-PSI 9200-25 DT delivers the precision that telecom transmission equipment 200V applications require:
- <9mV RMS voltage ripple: Ultra-low ripple ensures clean DC power that does not introduce noise into sensitive RF and signal processing circuits
- <1.8mA RMS current ripple: Minimal current ripple protects sensitive loads from current-induced stress
- High stability: FPGA-controlled architecture with up to 16-bit resolution provides exceptional setpoint accuracy and stability
- Remote sensing: Compensates for voltage drops in test leads, ensuring accurate voltage at the load
For legacy base station 200V DC applications, where equipment may be decades old and particularly sensitive to power quality, the ultra-low ripple and high stability of the EA-PSI 9200-25 DT ensure that test results are not compromised by power supply artifacts.
TPS Elektronik’s programmable power supply portfolio includes the EA-PSI 9200-25 DT as a 200V DC converter telecom test solution, supporting both R&D and production environments.
5. Built-In Function Generator for Step-Up Converter Validation
Validating -48V to 200V step-up converters requires more than static DC output testing. Engineers need to characterize converter performance under dynamic conditions—simulating real-world load variations, input voltage transients, and startup sequences.
The EA-PSI 9200-25 DT includes a built-in multi-function generator that supports:
- Sine, triangle, rectangle, and trapezoid waveforms for basic dynamic testing
- Ramp functions for startup and shutdown characterization
- DIN40839 waveforms for automotive and industrial transient testing
- Arbitrary waveform generation for custom test sequences
For telecom rectifier 200V output testing, the function generator enables engineers to:
- Simulate load transients to verify step-up converter response time
- Generate input voltage variations to test converter regulation
- Create custom test profiles that replicate field operating conditions
- Automate repetitive tests using the sequencer function
The front USB port allows saving and loading user-defined test profiles and arbitrary waveform sequences, streamlining the testing process for production environments.
6. Comprehensive Protection and Safety Features
Telecom infrastructure equipment represents significant capital investment, and protection against electrical faults is essential. The EA-PSI 9200-25 DT includes comprehensive protection features:
- OVP (Overvoltage Protection): Protects connected loads from voltage excursions beyond set limits
- OCP (Overcurrent Protection): Prevents damage from excessive current draw
- OPP (Overpower Protection): Shuts down the output if power exceeds safe limits
- OTP (Overtemperature Protection): Reduces output or shuts down if internal temperature exceeds safe operating limits
Additionally, the ≥200V model includes a built-in discharge circuit that drops residual output voltage below 60V within 10 seconds after output shutdown. This feature enhances safety when connecting and disconnecting test leads—particularly important for 200V power system telecom applications where high voltage presents a shock hazard.
The unit also features temperature-controlled fan cooling, which adjusts fan speed to maintain optimal operating temperatures while minimizing noise.
For high voltage telecom DC 200V applications, these protection features and safety mechanisms provide peace of mind for both bench testing and production environments.
7. Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Model | EA-PSI 9200-25 DT (PN: 06200512) |
| Output Voltage | 0–200V DC |
| Output Current | 0–25A |
| Output Power | 0–1500W |
| Input Voltage | 90–264V AC, 45–65Hz |
| Power Factor | >0.99 (active PFC) |
| Efficiency | Up to 93% |
| Voltage Ripple (RMS) | <9mV |
| Voltage Ripple (PP) | <60mV |
| Current Ripple (RMS) | <1.8mA |
| Operating Modes | CV, CC, CP, CR auto-ranging |
| Display | TFT touch panel |
| Function Generator | Sine/Triangle/Rect/Trapezoid/Ramp/DIN40839/Arbitrary |
| Interfaces | USB-A, USB-B, Ethernet, 15-pin analog |
| Protocols | SCPI, ModBus RTU |
| Protection | OVP, OCP, OPP, OTP |
| Discharge Circuit | <60V within 10s |
| Dimensions (W×H×D) | 308×103×415 mm |
| Weight | Approx. 8.2 kg |
| Compliance | EN 60950, EN 61326, EN 55022 Class B |
