100W 60V/5A Programmable DC Switching Power Supply

Overview

The UDP6720 is a 100 W programmable DC switching power supply with a 60 V × 5 A wide-range output, RS-232 with full SCPI control, 600-group memory, list mode, and OVP/OCP/OTP protection.

Entry-tier 100W class. The 60V × 5A envelope plus power ratio 3.0 makes one supply cover most 5V/12V/24V/48V bench work without changing instruments.

It's built for a workbench that runs the same supply across product design, board debug, and deployed test fixtures — affordability where the spec sheet doesn't punish it, precision where the load demands it, and an interface direct enough that the next person sitting down doesn't need a manual.

Across the Design. Debug. Deploy.™ Lifecycle

The UDP6700 series fits the workflow we call Design. Debug. Deploy. — the three-act cycle most engineering teams actually run a power supply through. In Design, list mode and 600 memory groups let a planned voltage profile execute repeatably while the rest of the bench attends to capture and analysis. In Debug, OVP/OCP/OTP protections, remote sense compensation, and a 4-digit dual LED display make it safe to push a marginal load and see exactly what's happening at the terminals. In Deploy, RS-232 with full SCPI command coverage means the same supply that ran on the design bench can drop into a production rack and be controlled by the same scripts. One instrument, three phases, no relearning.

Key Features

• 100 W rated power, 60 V × 5 A wide envelope — Up to 60 V at 1.67 A or 20 V at 5 A — same 100 W envelope, no second instrument
• Wide-range output with power ratio 3.0 — one supply covers V/I combinations that would otherwise require two
• Programmable list mode: 9 steps per list, 1 ms to 9999 s per step, repeat 1–9999 cycles
• Trigger delayer: 9 trigger groups, 1 ms to 9999 s per trigger
• 600 memory groups (M1: 100 / M2: 100 / M3: 400) for stored output configurations
• Over-voltage, over-current, and over-temperature protection with set ranges 0–110% of rated
• Remote sense compensation for accurate output at the load terminals over long leads
• RS-232 with full SCPI command coverage; a software-only PC controller is included
• Smart fan: load- and temperature-controlled for low audible noise at light load
• 4-digit dual LED display with simultaneous V and I readout
• OVP/OCP thresholds set with a long-press on the V or I key — no menu dive
• Knob and direct numeric entry on the front panel; both work the same way
• Software calibration retains traceability without an internal trim-pot pass

Wide-Range Output (Power Ratio 3.0)

Power ratio 3.0 means the rated output envelope can be redistributed between voltage and current as the load demands. Where a fixed-rectangle supply would force a tradeoff — buy enough volts or enough amps — the UDP6700 lets you trade one for the other along a constant-power curve. Most general-purpose bench work sits inside that envelope, so one supply does the work of two.

The exact V × I corners depend on rated power; the spec table below shows the maximum voltage at rated current and the maximum current at rated voltage for this SKU.

Remote Sense Compensation

Long leads drop volts. At 5 A through 1 m of 18-AWG wire, the lead drop is around 100 mV — enough to sour a 3.3 V regulator test or starve a battery cycler. Remote sense routes the regulation feedback past the leads to the load terminals themselves, holding the programmed voltage where it actually matters.

The remote sense terminals are wired separately from the output terminals on the rear panel; the supply auto-detects sense connection and falls back to local sensing if the wires are removed.

OVP / OCP / OTP Protection

Three independent protections cover the most common ways a load fails: a short or low-impedance fault drives current up (OCP), a misconfigured DUT pulls voltage out of spec (OVP), or a sustained over-load heats the supply itself (OTP). All three trip the output off and display a fault state on the front panel.

OVP and OCP thresholds are set with a long-press on the V or I key — set the threshold once, run the load. No menu dive, no nested submenu. OTP is internal and not user-configurable.

List Mode and Trigger Delayer

List mode runs a 9-step voltage and current sequence with each step held from 1 ms to 9999 s and the whole list repeated 1 to 9999 cycles. Useful for battery cycling, automotive cold-crank profiles, and any scripted sequence that needs to run unattended.

Trigger delayer fires 9 trigger groups with delays between 1 ms and 9999 s. Useful when an output transition needs to wait for an external event — DUT settling, fixture motion, an oven step — before moving to the next setting.

600 Memory Groups (M1 / M2 / M3)

Three memory banks store 100, 100, and 400 output configurations. M1 and M2 are typically used for active recipes (the configuration in the front-panel knob workflow); M3 holds 400 long-term recall configurations for products and DUTs the bench works on regularly.

Each memory entry stores voltage setting, current setting, OVP and OCP thresholds, and the slope/list state. Recall is a single front-panel keypress.

RS-232 with Full SCPI Command Coverage

RS-232 with full SCPI command set. Voltage and current setpoint, OVP/OCP threshold, list configuration, memory recall, output enable, and readback all accessible from a host script. The included Windows PC software exposes the same commands through a GUI for users who don't want to write code.

RS-232 is honest about what it is: one supply per host port, no LAN, no USBTMC. For multi-instrument benches with more than one programmable supply or for remote/automated environments, the UDP6900B series adds USB, LAN with web control, RS-485 with Modbus, and multi-machine daisy-chain.

Thermal Derating

The UDP6720 delivers full 100 W rated output at ambient temperatures up to about 30 °C. Above that, output power derates linearly to maintain internal junction temperatures inside the safe envelope. The derating curve below shows the exact relationship between ambient temperature and rated power for this SKU. Operating temperature range is 0–40 °C.

The smart fan adjusts speed automatically based on load and internal temperature; light-load operation is quiet, and the supply only ramps fan speed when thermal headroom requires it.

Applications

Industrial Maintenance Bench

Replaces the aging 30 V / 3 A bench supply with one that covers the same work plus 5 V to 60 V for everything an industrial control bench actually sees: 24 V relays, 12 V automotive subassemblies, 5 V logic. Memory recall stores per-DUT setups; OCP catches the shorted harness before the harness wins.

Embedded R&D

Programmable supply for board bring-up. Ramp slowly through a brown-out window with list mode; protect a marginal regulator with OVP set 5% above target; readback voltage and current to the host script over RS-232. The 100 W envelope is enough for most prototype boards short of motor or RF PA work.

Production Test Station

Fixture supply for end-of-line test on small assemblies. The 600 memory groups absorb the per-product configuration table; the front-panel UI keeps the operator interface simple; RS-232 exposes the same supply to the test executive. One supply, one configuration database, both UIs.

Education and Lab Bench

Teaching lab supply with real protections, real list mode, real readback. Students see the same instrument architecture they'll see in industry — programmable, scripted, protected — without the price of a research-grade unit.

Accessories & In the Box

Every UDP6700 ships with a power cord, a quick-start guide, the Windows PC software (download), an RS-232 cable, and a calibration certificate. Test leads with alligator clips are an optional accessory and not included in the base configuration.

• Power cord (region-specific)
• RS-232 communication cable
• Quick-start guide
• PC software (download via uni-trendus.com)
• Factory calibration certificate

Optional accessory: Alligator-clip test lead set (sold separately).

Frequently Asked Questions

How does the UDP6720 compare to the rest of the UDP6700 series?

Four SKUs cover four envelopes:

• UDP6720 — 100 W, 60 V × 5 A (this product). Entry-tier; general bench, R&D, low-current loads.
• UDP6721 — 180 W, 60 V × 8 A. Same 60 V ceiling, more current. For higher-inrush loads or 24 V/48 V work that needs 6–8 A continuous.
• UDP6730 — 360 W, 40 V × 30 A. High-current. Motor drive, automotive 12 V/24 V, large solenoid work.
• UDP6731 — 360 W, 80 V × 15 A. High-voltage. 48 V telecom, 60 V/72 V battery, GaN/SiC pre-driver.

All four share the same UI, the same SCPI command set, the same memory model, and the same RS-232 host interface; the only differences are the V × I envelope and the regulation/ripple specs that follow from it.

Where does this fit relative to the UDP6900B series?

The UDP6900B series is the next step up. Same form factor, same wide-range output philosophy, but adds USB and LAN with web control, RS-485 with Modbus, multi-machine daisy-chain, slope-mode output, auto-range mode, and a built-in DVM. If a single supply on a single host port satisfies the bench, the UDP6700 is the right choice; if the bench has multiple programmable supplies, needs LAN access, or runs scripted multi-instrument tests, UDP6900B is the right step up.

Where does this fit relative to the UDP3000C series?

The UDP3000C series is multi-channel linear, not single-channel switching. If the bench needs two or three independent isolated outputs in one chassis (rail + bias + reference, for example), UDP3000C is the right tool. UDP6700 is the right tool when a single high-power output beats three medium-power outputs.

What's in the box?

Power cord, RS-232 cable, quick-start guide, factory calibration certificate. Windows PC software is a free download from uni-trendus.com. Test leads with alligator clips are an optional accessory and not included in the base configuration.

Is the chassis 1U rack-mountable?

No. The chassis is 174 mm tall (about 6.85 inches), which is a desktop form factor — not 1U (44.45 mm). It will fit on a shelf in a standard 19-inch rack but will not mount in a 1U slot. UNI-T does not currently offer a rack-mount kit for the UDP6700 series.

Part of the UDP6700 programmable DC switching power supply series. See also UDP6721, UDP6730, UDP6731.