UDP5800-4 800W 800V/4A Programmable DC Switching Power Supply
.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px sol id #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} Overview The UNI-T UDP5800-4 is a single-channel 800W programmable DC switching power supply delivering 0.5–800 V and 0–4A with auto-ranging across the rated power envelope. It brings the same platform-level accuracy, source-emulation capability, and SCPI remote control as the rest of the UDP5000 family to high-voltage applications — 400 V and 800 V EV traction batteries, high-string PV, industrial DC bus — that lower-voltage tiers cannot reach. Voltage accuracy is ±(0.05% of set + 0.05% of rated) and current accuracy ±(0.5% of set + 0.1% of rated); voltage ripple is held to 200mV p-p with a 100 ppm/°C temperature coefficient. A 2.4-inch TFT-LCD shows voltage, current and power together, and full SCPI control over USB and LAN drops the UDP5800-4 straight into LabVIEW, Python-VISA or any ATE framework. Choosing Your Model — UDP5000 Series The UDP5000 name spans 20 models built on one platform: five voltage classes (40 V / 80 V / 160 V / 250 V / 800 V) across four power classes (400 W / 800 W / 1200 W / 2000 W). They differ only in output range and chassis size — control, accuracy, protection and interface are otherwise identical. Compare the full series before selecting: Rated Power 40 V 80 V 160 V 250 V 800 V 400W UDP5040-400–40A UDP5080-200–20A UDP5160-80–8A UDP5250-60–6A UDP5800-20–2A 800W UDP5040-800–80A UDP5080-400–40A UDP5160-160–16A UDP5250-120–12A UDP5800-40–4A 1200W UDP5040-1200–120A UDP5080-600–60A UDP5160-240–24A UDP5250-180–18A UDP5800-60–6A 2000W UDP5040-2000–200A UDP5080-1000–100A UDP5160-400–40A UDP5250-300–30A UDP5800-100–10A Every model shares the same chassis architecture, control system, regulation accuracy, protection suite, and interface set. The 800 V UDP5800 tier does not support series connection; all other tiers support series and parallel combining. Choose by the voltage class that covers your rail and the power class that covers your load — output range and chassis height scale with power, the instrument does not change. Key Features 800W / 0.5–800 V / 0–4A — auto-ranging across the rated power envelope Voltage accuracy ±(0.05% of set + 0.05% of rated); current accuracy ±(0.5% of set + 0.1% of rated) Low ripple — 200mV p-p voltage, 6mA rms current (20 MHz BW) CC/CV priority slope modes — choose voltage-first or current-first turn-on for DUT safety Adjustable internal resistance to 150Ω — emulate high-voltage source impedance List Mode — 128 programmable V/I/dwell steps, 1 to 9,999 or infinite cycles, stand-alone Front and rear output terminals (front limited to 10 A) Multi-unit parallel only — 4 units maximum; series connection not supported at 800 V USB + LAN with full SCPI 1999.0 / IEEE-488.2; 2.4-inch TFT-LCD Discharge-load control for rapid output bleed-down; enhanced isolation — 1900 VAC withstand UNI-T UDP5800-4 Details CC/CV priority mode transition behaviour CC/CV Priority — Protect the Device, Not Just the Supply Most bench supplies treat the CC/CV crossover as a fixed hardware behaviour. The UDP5000 lets you choose which parameter takes priority at turn-on and during mode transitions. CV-priority establishes the target voltage first — the right choice for capacitor banks, converter input rails, and battery packs where voltage overshoot must be bounded. CC-priority brings current up under control — the right choice for electrolysis cells, formation rigs, and any load where inrush must be limited at 800 V. ×CC/CV priority mode transition behaviour Adjustable Slew Rate — Control How Fast Power Arrives Voltage and current slew rates are independently settable. At 800 V, a controlled ramp is not optional — capacitive DUTs, battery packs, and film capacitors under formation all need current and voltage to arrive at a rate the load can absorb safely. High-speed mode is available when fast settling is the test requirement. Adjustable voltage and current slew rate ×Adjustable voltage and current slew rate Internal variable resistance source emulation Internal Resistance — Simulate High-Voltage Source Impedance The internal variable-resistance function (set in CV mode, up to 150Ω in 1 mΩ steps) makes the terminal voltage droop with load current exactly as a high-voltage battery pack or fuel cell stack would — no external resistor, no thermal risk at 800 V, value changeable instantly from the panel or over SCPI. ×Internal variable resistance source emulation Front & Rear Outputs — Bench-Ready and Rack-Ready Output terminals are provided on both panels. Front terminals are available for quick hookup; rear terminals keep permanent rack wiring clean and away from the high-voltage output when mounted in a test rack. Both share the same output — front-panel draw is limited to 10 A, so high-current loads belong on the rear. Front and rear output terminals ×Front and rear output terminals List Mode programmable output sequencing List Mode & Discharge Control — Automate Output Sequences List Mode runs up to 128 programmed V/I/dwell steps for 1 to 9,999 or infinite cycles, stored locally or exported, executing with no PC attached — built for overnight formation runs, pack ageing cycles, and unattended production routines at 800 V. The internal discharge load bleeds output capacitance down rapidly when output is switched off. ×List Mode programmable output sequencing Multi-Unit Parallel — Scale Current When You Need More Up to 4 identical units combine in parallel for proportionally higher output current, coordinated over the rear CAN / LS_BUS interface from the master unit or a single SCPI connection; unit-to-unit current balance stays within ~5% of rated. Series connection is not supported on the UDP5800 at 800 V. Multi-unit parallel operation ×Multi-unit parallel operation UDP5000 front panel — 2.4-inch TFT-LCD with multifunction keypad Display and Control A 2.4-inch TFT-LCD presents voltage, current and power simultaneously with a concise multifunction keypad; external analog control (0–10 V setpoint plus digital ON/OFF) is available on the rear analog interface for closed-loop and HIL setups operating at high voltage. ×UDP5000 front panel — 2.4-inch TFT-LCD with multifunction keypad Applications EV Battery Module Test 800 W covers formation and characterisation of 400 V–800 V battery modules at practical formation currents. Constant-power architecture maintains rated power across the full state-of-charge window. High-Voltage Inverter Validation Supplies a stable 800 V DC bus for SiC/GaN inverter efficiency sweeps, switching-loss characterisation, and thermal validation runs. Industrial DC Bus Emulation Emulates 400 V–800 V industrial DC bus conditions for drive controller and power-electronics validation where a live bus is impractical. Accessories and Family Options In the box: power cord (destination-country standard, 1.8 m), four-conductor analog-interface flat cable (3.5 m), USB cable (1.5 m), M3 mounting screws, output-terminal protection cover, and rack distribution bracket. The UDP5000 series spans 20 models on one platform — see Choosing Your Model above for the full voltage × power matrix if a different rail or load fits your application better. Frequently Asked Questions Can I use the front and rear output terminals at the same time? Both terminal sets are parallel connections to the same single output. You can wire both, but the front terminals are limited to 10 A maximum — route high-current loads to the rear panel. What is the difference between the VHS/IHS and VSR/ISR slope modes? VHS (CV high-speed) and IHS (CC high-speed) use the supply's default fast rise and fall rates. VSR (CV slope) and ISR (CC slope) let you set the rise and fall rate so output ramps in controlled fashion — at 800 V this is critical for capacitive and battery loads that cannot absorb uncontrolled current at turn-on. Does the internal-resistance function need an external resistor? No. The internal variable-resistance function electronically emulates source impedance (set in CV mode, up to 150Ω in 1 mΩ steps), so the supply behaves like a high-voltage battery pack or fuel cell stack with no physical resistor and no added thermal risk. Can multiple units be combined for more power? Yes, up to 4 identical units in parallel for more current, coordinated from the master unit or a single SCPI connection; unit-to-unit balance stays within ~5% of rated. Series connection is not supported on the UDP5800 — the 800 V output already reaches the system ceiling for this platform. How does it integrate with automated test? USB and LAN with full SCPI 1999.0 / IEEE-488.2 support LabVIEW, Python-VISA and any standard ATE framework; List Mode runs stored sequences stand-alone without a connected PC. Specifications DC Voltage Out 800 V DC Current Out 4 A DC Power Out 800 W Voltage Resolution 1 mV (< 100 V) / 10 mV (≥ 100 V) Current Resolution 1 mA Programmable Yes Channels 1Ch Interface USB-Device, USB-Host, LAN, Analog I/O Documentation UDP5800-4 Datasheet, User Manual, and Software/Firmware Downloads