SPD3303X / SPD3303X-E — Triple-output Programmable DC Power Supplies
Programmable linear bench power supplies with three independently controlled and isolated outputs: two 0–32 V / 0–3.2 A adjustable channels and one selectable 2.5 V / 3.3 V / 5 V, 3.2 A output. Use independent, series or parallel modes for embedded, electronics and production bench power.
| Model | Channels | Resolution | Display | Setting / Readback Accuracy | Key Difference |
|---|---|---|---|---|---|
| SPD3303X | CH1/CH2: 0–32 V, 0–3.2 A · CH3: 2.5/3.3/5 V, 3.2 A | 1 mV / 1 mA | 5-digit voltage · 4-digit current | Voltage ±(0.03% rdg + 10 mV) · Current ±(0.3% rdg + 10 mA) | Higher display/readback resolution |
| SPD3303X-E | CH1/CH2: 0–32 V, 0–3.2 A · CH3: 2.5/3.3/5 V, 3.2 A | 10 mV / 10 mA | 4-digit voltage · 3-digit current | Voltage/current ±(0.5% rdg + 2 digits) | Economy version |
Key Features
Three Independently Controlled Outputs
Two adjustable 0–32 V / 0–3.2 A channels and one selectable 2.5 V / 3.3 V / 5 V output allow mixed analog, digital and logic rails to be powered from one bench instrument.
Series and Parallel Operation
CH1 and CH2 can run independently, in series up to 60 V max, or in parallel up to 6.4 A max. This avoids buying a separate higher-voltage or higher-current supply for many bench tasks.
Timing Output for Simple Power Sequencing
The timing function provides programmed output steps directly from the front panel. It is useful for supply sequencing, ramp testing and repeated power-cycle checks.
Real-time Wave Display
The front panel can show real-time output behaviour, making it easier to see voltage/current trends while debugging a circuit.
Resolution Difference: X vs X-E
SPD3303X gives 1 mV / 1 mA minimum resolution, while SPD3303X-E gives 10 mV / 10 mA. For fine biasing work, choose the SPD3303X.
Save/Recall and PC Control
Five internal groups of settings can be saved and recalled. EasyPower PC utility and LabVIEW driver support are available for remote programming workflows.
Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| OUTPUT CHANNELS | ||
| CH1 / CH2 output | V / A | 0–32 V / 0–3.2 A per channel |
| CH3 output | V / A | 2.5 V / 3.3 V / 5.0 V selectable, 3.2 A |
| Total power | W | 220 |
| Output modes | — | Independent · Series up to 60 V max · Parallel up to 6.4 A max |
| DISPLAY AND RESOLUTION | ||
| Display | — | 4.3-inch true-colour TFT-LCD, 480 × 272 |
| SPD3303X display / resolution | — | 5-digit voltage, 4-digit current · 1 mV / 1 mA |
| SPD3303X-E display / resolution | — | 4-digit voltage, 3-digit current · 10 mV / 10 mA |
| ACCURACY | ||
| SPD3303X setting/readback accuracy | — | Voltage ±(0.03% of reading + 10 mV) · Current ±(0.3% of reading + 10 mA) |
| SPD3303X-E setting/readback accuracy | — | Voltage/current ±(0.5% of reading + 2 digits) |
| PROGRAMMING AND CONTROL | ||
| Timing function | — | Programmed output steps from front panel |
| Storage | — | Five internal groups of save/recall settings |
| Remote support | — | EasyPower PC utility and LabVIEW driver support |
| PROTECTION AND COOLING | ||
| Protection | — | Output short and overload protection |
| Fan | — | Intelligent temperature-controlled fan |
Applications
Embedded Prototype Power
Power microcontroller, FPGA, sensor and analog rails simultaneously using two adjustable channels plus the fixed logic rail.
PCB Debug and Bring-up
Use current limit, CV/CC crossover and independent channel control to safely bring up new boards.
Rail Sequencing and Power-cycle Test
Use timing output to repeat controlled output steps for startup, shutdown and brownout checks.
University Electronics Lab
A practical triple-output bench supply for analog electronics, embedded systems and instrumentation teaching labs.
Basic Production Power Source
Use save/recall settings and remote programming support for repeated bench or production acceptance tests.
Repair and Maintenance Bench
Compact linear supply for troubleshooting, board repair and controlled replacement of missing system rails.
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