MEAN WELL DDR-480 Series 480W DIN Rail DC-DC Converter
Manufacturer: TRC Electronics
Key Features
- Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standards
- Ultra-slim width: 85.5mm
- 2:1 wide input range
- Wide operating temperature: -40~+80℃
- 150% peak load capability
- Current sharing up to 1920W (3+1 units)
- Adjustable DC output voltage
- Cooling by free air convection (fanless design)
- Suitable for DIN rail TS-35/7.5 or TS-35/15 mounting
- Protections: Short circuit, Overload, Over voltage, Over temperature, Input reverse polarity, Input under voltage
- 4KVdc I/O isolation (Reinforced isolation)
- DC OK relay contact
- Remote ON-OFF control
- Operating altitude up to 5000 meters
- 3 years warranty
Applications
- Bus, tram, metro, or railway systems
- Industrial control systems
- Semi-conductor fabrication equipment
- Factory automation
- Electro-mechanical applications
- Wireless networks
- Telecom or datacom systems
Description
The DDR-480 series is a 480W DIN Rail type DC-DC converter. It features easy DIN rail installation, an ultra-slim width of 85.5mm, a 2:1 wide input voltage range, fanless operation, and a wide operating temperature range of -40~+80℃. It offers 4KVdc I/O isolation, 150% peak load capability, current sharing, DC OK signal, adjustable output voltage, and comprehensive protective functions. Available input voltage options include 16.8~33.6V, 33.6~67.2V, and 67.2~154V, with multiple output options of 12V, 24V, and 48V. These converters are suitable for industrial and railway control, security control, communication systems, and other fields, serving as DC buck/boost regulators, insulation level enhancers, and voltage drop compensators.
Model Encoding
The model encoding follows the pattern: DDR-480 B-24
- DDR-480: Series name and rated wattage (480W)
- B, C, D: Input voltage range (B: 16.8~33.6Vdc, C: 33.6~67.2Vdc, D: 67.2~154Vdc)
- 12, 24, 48: Output voltage (12Vdc, 24Vdc, 48Vdc)
Specifications
General Specifications
| DC VOLTAGE | 12V, 24V, 48V |
| RATED CURRENT | 33.4A (12V), 20A (24V), 10A (48V) |
| CURRENT RANGE | 0~33.4A (12V), 0~20A (24V), 0~10A (48V) |
| RATED POWER | 400.8W (12V), 480W (24V, 48V) |
| PEAK CURRENT (5 sec.) | 50.1A (12V), 30A (24V), 15A (48V) |
| PEAK POWER (5 sec.) | 601.2W (12Vo), 720W (24Vo/48Vo) |
| RIPPLE & NOISE (max.) | 100mVp-p (12V), 120mVp-p (24V), 150mVp-p (48V) |
| VOLTAGE ADJ. RANGE | 12~14V (12V), 24~28V (24V), 48~56V (48V) |
| VOLTAGE TOLERANCE | ±1.0% |
| LINE REGULATION | ±0.5% |
| LOAD REGULATION | ±1.0% |
| SETUP, RISE TIME | 500ms, 60ms |
| HOLD UP TIME (Typ.) | Refer to Derating Curve page |
| INPUT VOLTAGE CONTINUOUS RANGE | B: 16.8~33.6Vdc, C: 33.6~67.2Vdc, D: 67.2~154Vdc |
| EFFICIENCY (Typ.) | 90% - 93% (model dependent) |
| DC CURRENT (Typ.) | 23A @24Vdc, 11.2A @48Vdc, 5A @110Vdc |
| INRUSH CURRENT (Typ.) | 30A |
| INTERRUPTION OF VOLTAGE SUPPLY | EN50155: 2017-B/C/D type comply with S2 level (10ms) @ full load |
| OVERLOAD PROTECTION | Normally works within 150% rated output power for 5 seconds, then constant current protection (105~135%) with auto-recovery. |
| OVER VOLTAGE PROTECTION | Shut down o/p voltage, re-power on to recover. (Range: 14.4~17.5V for 12V, 28.8~35V for 24V, 57.6~65V for 48V) |
| OVER TEMPERATURE PROTECTION | Internal MOSFET, no damage, recovers automatically after fault condition is removed. |
| INPUT REVERSE POLARITY PROTECTION | Two MOSFETs in series; opens when polarity is reversed, protecting the unit. |
| UNDER VOLTAGE LOCKOUT | 24Vin (B-type): Power ON 16.8V, OFF 16.5V; 48Vin (C-type): Power ON 33.6V, OFF 33V; 110Vin (D-type): Power ON 67.2V, OFF 65V. |
| DC OK RELAY CONTACT RATINGS (max.) | 30Vdc/1A resistive load |
| CURRENT SHARING | Up to 1920W (3+1 units). Refer to Function Manual. |
| REMOTE ON-OFF CONTROL | Refer to Function Manual. |
| WORKING TEMP. | -40 ~ +80℃ (Refer to Derating Curve) |
| WORKING HUMIDITY | 5 ~ 95% RH non-condensing |
| STORAGE TEMP., HUMIDITY | -40 ~ +85℃, 5 ~ 95% RH non-condensing |
| TEMP. COEFFICIENT | ±0.03%/℃ (0 ~ 55℃) |
| VIBRATION | Component: 10~500Hz, 5G, 10min/cycle, 60min each axis; Mounting: Compliance to IEC61373 |
| OPERATING ALTITUDE | 5000 meters |
Safety & EMC Standards
| SAFETY STANDARDS | UL 62368-1, IEC 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved |
| WITHSTAND VOLTAGE | I/P-O/P: 4KVdc, I/P-FG: 2.5KVdc, O/P-FG: 0.71KVdc |
| ISOLATION RESISTANCE | I/P-O/P, I/P-FG, O/P-FG: >100M Ohms / 500Vdc / 25℃/70% RH |
| EMC EMISSION | Conducted: BS EN/EN55032 (CISRP32) Class A; Radiated: BS EN/EN55032 (CISRP32) Class B; Voltage Flicker: BS EN/EN61000-3-3; Harmonic Current: Not specified. |
| EMC IMMUNITY | ESD: BS EN/EN61000-4-2 Level 3 (8KV air; 6KV contact); Radiated: BS EN/EN61000-4-3 Level 3 (10V/m); EFT/Burst: BS EN/EN61000-4-4 Level 3 (2KV); Surge: BS EN/EN61000-4-5 Level 3 (1KV/Line-Line; 2KV/Line-Line-FG); Conducted: BS EN/EN61000-4-6 Level 3 (10V); Magnetic Field: BS EN/EN61000-4-8 Level 4 (30A/m). All with criteria A. |
| RAILWAY STANDARD | Compliance to BS EN/EN45545-2 for fire protection; Meets BS EN/EN50155 / IEC60571 (shock & vibration per IEC61373), BS EN/EN50121-3-2 for EMC. |
| MTBF | 280.0K hrs min. (Telcordia SR-332); 101.7K hrs min. (MIL-HDBK-217F @ 25℃) |
| DIMENSION (W*H*D) | 85.5*125.2*128.5mm |
| PACKING | 1.375Kg; 8pcs/12Kg/0.95CUFT |
Diagrams and Curves
Block Diagram: Illustrates the internal architecture of the DC-DC converter, showing the flow from DC Input through an EMI Filter, Power Switching, Rectifiers & Filter to the DC Output. It includes control signals for O.L.P. (Over Load Protection), O.V.P. (Over Voltage Protection), PWM Control, Remote Control, and Current Share.
Derating Curve: This graph shows the relationship between load percentage and ambient temperature. It indicates continuous operation limits and a peak load condition (for 5 seconds) for various models, illustrating how temperature affects maximum load capacity.
Output Derating VS Input Voltage: This graph illustrates how the output load capacity (as a percentage) varies with different input voltage ranges for 'B' Type, 'C' Type, and 'D' Type models.
Peak Loading: Details the peak load capabilities, showing that 150% load (601.2W for 12Vo, 720W for others) is supported for 5 seconds, while 100% load (400.8W for 12Vo, 480W for others) is supported for 100 seconds.
DC OK Relay Contact: Describes the function of the DC OK relay contact: 'Contact Close' signifies PSU turns on / DC OK, and 'Contact Open' signifies PSU turns off / DC Fail. The contact ratings are a maximum of 30Vdc/1A resistive load.
Function Manual - Current Sharing: Explains parallel operation by connecting P+ and P- terminals mutually. It specifies that the voltage difference between outputs should be less than 0.2V, the total output current should not exceed (rated current per unit) x (number of units) x 0.9, and the maximum parallel units are 4. A minimum output load of 3% of the total output load is also required.
Function Manual - Remote ON-OFF Control: Details how the power supply can be turned ON/OFF using the 'Remote ON-OFF' function. An open circuit or 5.5~10VDC input turns the power supply ON, while a short circuit or 0~0.8VDC input turns it OFF.
Input Fuse: Specifies that a fuse is connected in series to the positive input line for surge protection. Fuse types and ratings are provided for models B (Time-Lag, 10A, 250V), C (Time-Lag, 8A, 250V), and D (Time-Lag, 6.3A, 250V).
Input Under-Voltage Protection: Describes that if the input voltage drops below Vmin, the control IC shuts down the output. It automatically recovers when the input voltage rises above Vmin. Graphs illustrate the turn-on and turn-off voltage thresholds for different models (e.g., DDR-480B-24, DDR-480C-24, DDR-480D-24).
Input Reverse Polarity Protection: Two MOSFETs in series protect the unit by opening if the input polarity is reversed.
Inrush Current: An initial start-up resistor suppresses inrush current, which is then bypassed by MOSFETs to reduce power consumption.
Hold-up Time: Details the hold-up time specifications for B, C, and D types under different load conditions (100% load, 70% load, other load), referencing specific figures for curves showing hold-up time versus load.
Efficiency vs Load & Vin Curve: These graphs show the efficiency of various DDR-480 models across different load percentages and input voltage variations.
Immunity to Environmental Conditions: A table detailing various environmental tests (Cooling, Dry Heat, Damp Heat, Vibration, Shock, Low Temperature Storage, Salt Mist) performed according to EN 50155 and EN 60068 standards, along with test conditions and status (e.g., PASS, No damage).
EN45545-2 Fire Test Conditions: A table listing fire safety tests (Oxygen index, Smoke density, Smoke toxicity, Glow-wire, Vertical flame) conducted according to EN 45545-2 standards, showing compliance across Hazard Levels HL1, HL2, and HL3.
Mechanical Specification: Provides dimensions (Width 85.5mm, Height 125.2mm, Depth 128.5mm) and terminal pin assignments for TB1 (FG, DC input -Vin, DC input +Vin, Remote ON/OFF) and TB2 (DC output +Vo, DC output -Vo, DC OK Relay Contact, P+,P- for Current sharing).
Installation Instruction: States that the series fits DIN rail TS35/7.5 or TS35/15 and refers to the Instruction Manual for installation details. The unit itself does not include the DIN rail.
