The Lambda/TDK EMS7.5 series comprises high-power switch-mode AC-to-DC power supplies engineered for applications requiring high efficiency, precise regulation, and compact form factor. These units operate as constant voltage/constant current sources with automatic crossover, delivering 7.5V DC output across multiple current and power ratings. Fully programmable via analog control or optional RSTL digital interface, the EMS7.5 integrates into demanding industrial and test environments.
## Technical Specifications
**Output Characteristics**
• Output Voltage: 7.5V DC nominal
• Output Current: 130A, 250A, 300A (model-dependent)
• Output Power: 1 kW, 2 kW, 2.25 kW (model-dependent)
• Efficiency: Up to 90% typical
• Line Regulation: 0.1% of rated output voltage
• Load Regulation: 0.1% of rated output voltage
• Stability: 0.1% over 8 hours after 30 minutes warm-up
**Input Specifications**
• Single-phase: 170–265 VAC, 47–63 Hz
• Three-phase 2.5 kW: 190–253 VAC at 47–63 Hz (28.5 A or 16.5 A, user selectable)
• Three-phase 5 kW: 190–253 VAC at 24–30 A, 47–63 Hz or 342–418 VAC at 13.5–30 A, 50 Hz
• Three-phase 480V: 342–528 VAC, 47–63 Hz
**Electrical Performance**
• AC Inrush Current: Less than full load current
• Power Factor: 0.99 (single-phase), 0.94 (three-phase) at rated output power
• Soft Start: Standard on all models
## Key Features
• Constant Voltage/Constant Current operation with automatic mode crossover
• Programmable via analog signals or optional RSTL digital interface
• Remote sensing available for models ≤300V output
• CV/CC monitor, LOCAL/REMOTE, and ENABLE/DISABLE control signals
• Soft-start circuit limits inrush current during power-on
## Typical Applications
High-current DC power delivery, test benches, industrial power distribution, battery charging systems, and precision laboratory equipment requiring stable, regulated output.
## Compatibility & Integration
Analog programming enables direct integration with existing control systems. Optional RSTL digital interface supports networked system architectures. Remote sensing maintains tight voltage regulation at load terminals, critical for high-current applications.
