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 independent DC 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, and both rails can be fine-tuned with an output jumper.
Quick answer: choose the DSP300L-0304 when your LED display cabinet needs a 4.2 V rail and a 3.2 V rail from a single, compact power supply. It accepts 90–264 Vac, is protected against over-current, short circuit, over-voltage and over-temperature, and measures only 180 × 68 × 26 mm.
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 |
What Is the XingXiu DSP300L-0304?
DSP300L-0304 is a conversion device that turns 100–240 Vac mains power into 4.2 V and 3.2 V DC dual-channel power. It uses advanced LLC control technology with precise regulation and input-to-output isolation, which makes the unit safe, efficient and reliable.
Because the two rails are independent and each has its own jumper-selectable voltage, one supply can feed the different sections of an LED display cabinet instead of requiring two separate power supplies. The unit is used mainly in electronics, LED displays, security monitoring, communications, power systems, lighting displays and industrial equipment.
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).
Key Features of the XingXiu DSP300L-0304
- Wide AC input range — 90 Vac to 264 Vac, nominal 100 Vac to 240 Vac, 47 Hz to 63 Hz.
- Dual isolated outputs — 4.2 V and 3.2 V rails with jumper-selectable voltage levels.
- 264 W rated output power from a single compact unit.
- High power factor — PF > 0.95 at 230 Vac.
- High efficiency — ≥ 85% at 230 Vac under full load.
- Low leakage current — less than 1 mA at 230 Vac input.
- Advanced LLC control technology for precise regulation and stable output.
- Natural ventilation cooling — no fan, so no dust intake and no acoustic noise.
- Compact and light — 180 × 68 × 26 mm and approximately 350 g.
- Long service life — MTBF of at least 100,000 hours at 25 °C, half load and normal input.
Protection Functions
The DSP300L-0304 includes full protection with automatic recovery, so a fault on one rail shuts both outputs down instead of damaging the display.
| 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.
What certifications does the DSP300L-0304 hold?
The power supply holds CE, UL, FCC, CB and CCC certification, and its design complies with UL62368 / IEC62368 / EN62368 and GB4943.1-2022.
How much does the XingXiu DSP300L-0304 cost, and is it in stock?
The current price and stock level are shown at the top of this page. Contact our engineers if you need volume pricing or help matching the supply to your cabinet load.
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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