The XingXiu DSP300L-0304 is a wide-input, dual-output switching power supply built for LED display cabinets. It converts 100–240 Vac mains into two DC output rails — 4.2 V at up to 40 A and 3.2 V at up to 30 A — for a combined output of 264 W, with jumper-selectable voltage settings.
XingXiu DSP300L-0304 at a Glance
| Item | Detail |
|---|---|
| Product type | Wide-input, dual-output switching power supply (LED display power supply) |
| Brand / manufacturer | XingXiu |
| Model | DSP300L-0304 |
| SKU | XingXiu DSP300L-0304 |
| AC input | 90–264 Vac, nominal 100–240 Vac, 47–63 Hz |
| DC output | V1: 4.2 V / 40 A · V2: 3.2 V / 30 A |
| Rated output power | 264 W |
| Voltage selection | Output jumper, three levels per rail |
| Power factor | PF > 0.95 at 230 Vac |
| Efficiency | ≥ 85% at 230 Vac, full load |
| Safety certifications | CE, UL, FCC, CB, CCC |
| Dimensions | 180 mm × 68 mm × 26 mm (L × W × H) |
| Weight | Approx. 350 g |
| Cooling | Natural ventilation cooling |
Dual Output Channels: 4.2 V and 3.2 V
Each output rail has a three-level jumper, so the delivered voltage can be matched to the load without changing the power supply.
| Output | Voltage selection (jumper) | Min. current | Rated current | Peak current | Regulation accuracy |
|---|---|---|---|---|---|
| V1: 4.2 V | 3.8 V / 4.0 V / 4.2 V | 0 A | 40 A | 44 A | ±3% |
| V2: 3.2 V | 2.8 V / 3.0 V / 3.2 V | 0 A | 30 A | 33 A | ±3% |
Line regulation and load regulation are both ±2% on each rail. Output ripple and noise are 300 mVp-p on the 4.2 V rail (230 Vac input, 40 A load, 25 °C) and 200 mVp-p on the 3.2 V rail (230 Vac input, 30 A load, 25 °C).
Protection Functions
Protection behaviour depends on the fault: over-current, short-circuit and over-temperature protection have self-recovery functions, while over-voltage protection is latched. See the conditions below.
| Protection | Behaviour |
|---|---|
| Over-current protection (OCP) | 4.2 V rail: 44 A minimum with the 3.2 V rail at full load. 3.2 V rail: 33 A minimum with the 4.2 V rail at full load. Auto recovery; when the 4.2 V output goes over-current, both outputs shut down. |
| Short-circuit protection (SCP) | Self-recovery on both rails; a short on the 4.2 V output shuts both outputs down. |
| Over-voltage protection (OVP) | 6 V maximum, latched. |
| Over-temperature protection (OTP) | Triggered at 110 °C to 125 °C measured at the centre of the top of the case. Self-recovery. |
Input and Output Characteristics
| Parameter | Value |
|---|---|
| Input voltage range | 90 Vac to 264 Vac |
| Normal voltage range | 100 Vac to 240 Vac |
| Frequency range | 47 Hz–63 Hz |
| Max input AC current | 4.7 A max at 100 Vac |
| Inrush current (cold state) | < 60 A at 230 V |
| Efficiency (full load) | ≥ 85% at 230 Vac, full load |
| Leakage current | Less than 1 mA at 230 Vac input |
| Normal output power | 264 W |
| Input fuse | T6.3AL / 250 Vac |
| Power factor | PF > 0.95 at 230 Vac |
| Output voltage rise time | ≤ 100 ms at 110 Vac and 220 Vac, full load |
| Hold-up time | ≥ 10 ms on both rails |
| Output overshoot | ≤ 10% at turn-on and turn-off |
| Transient response | ±5%, slew rate 0.2 A/µs, 25%–50% and 50%–75% load steps |
Isolation, EMC and Safety
- Insulation resistance — 10 MΩ minimum at DC 500 V between input and output, input and FG, and output and FG.
- Dielectric strength — input to output 3000 Vac for 1 minute; input to FG 1500 Vac for 1 minute; output to FG 500 Vdc for 1 minute (≤ 10 mA).
- EMI — conducted and radiated emission to EN55022 Class B and FCC Part 15 Class B.
- EMS — ESD, EFT and surge tested to IEC61000-4-2/4/5, level 3, criterion A.
- Safety standards — UL62368 / IEC62368 / EN62368 and GB4943.1-2022.
- Certifications — CE, UL, FCC, CB and CCC.
Operating Environment and Physical Specifications
| Parameter | Value |
|---|---|
| Operating temperature | −40 °C to +70 °C (derating required at high temperature) |
| Storage temperature | −40 °C to +85 °C |
| Operating humidity | 10% to 90% RH, non-condensing |
| Storage humidity | 5% to 95% RH, non-condensing |
| Altitude | −60 m to 5000 m operating; up to 5000 m storage |
| Vibration | 10–500 Hz, 19.6 m/s² (2 G), 10 minutes along each of the X, Y and Z axes |
| Shock | 49 m/s² (5 G), 11 ms, once along each axis |
| Dimensions | 180 mm × 68 mm × 26 mm |
| Weight | Approximately 350 g |
| MTBF | ≥ 100,000 hours at 25 °C, half load, normal input |
Connectors and Pinout
The DSP300L-0304 uses screw terminals, so no soldering is needed when the supply is fitted into a cabinet.
- AC input — 3-pin M3 barrier terminal block. From left to right: PIN1 EARTH, PIN2 LINE, PIN3 NEUTRAL.
- DC output — M4 copper terminals with V1+ (+4.2 V), GND and V2+ (+3.2 V) positions.
Typical Applications
- LED display cabinets and LED display modules
- LED lighting and lighting displays
- Security monitoring equipment
- Communications and power system equipment
- Industrial equipment and general electronics
XingXiu DSP300L-0304 FAQ
What is the output of the XingXiu DSP300L-0304?
The DSP300L-0304 has two DC outputs: V1 at 4.2 V / 40 A (44 A peak) and V2 at 3.2 V / 30 A (33 A peak), for a total rated output power of 264 W.
Can I change the output voltage?
Yes. Each rail has a three-level output jumper. V1 can be set to 3.8 V, 4.0 V or 4.2 V, and V2 can be set to 2.8 V, 3.0 V or 3.2 V.
What input voltage does it accept?
The input voltage range is 90 Vac to 264 Vac with a normal voltage range of 100 Vac to 240 Vac at 47 Hz to 63 Hz, so the supply works on both 110 V and 230 V mains.
Is the DSP300L-0304 isolated?
Yes. Input and output are isolated, with 10 MΩ minimum insulation resistance at DC 500 V and 3000 Vac dielectric strength between input and output for one minute.
Does it need a cooling fan?
No. The DSP300L-0304 uses natural ventilation cooling. It operates from −40 °C to +70 °C, and derating is required at high ambient temperature.
More Pictures of the XingXiu DSP300L-0304
XingXiu DSP300L-0304 Specification Download
Download Specification: XingXiu DSP300L-0304 LED Power Supply Specification (PDF)
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