The TDK-Lambda LFS-39-15 is a convection-cooled, regulated DC power supply engineered for industrial applications demanding stable output under varying line and load conditions. This 15V, 45W unit delivers 1.3A nominal current with selectable or wide-range AC input flexibility. It incorporates remote sense, remote programming, and TTL-compatible remote on/off control, making it ideal for automated systems and distributed power architectures requiring precise voltage regulation and minimal ripple.
Technical Specifications
Electrical Performance
• Output: 15V DC, 45W maximum, 1.3A nominal
• Input: User-selectable 95–132 VAC / 187–265 VAC, or wide-range 85–265 VAC (47–440 Hz)
• Line Regulation: 0.01% (low to high line)
• Load Regulation: 0.01% (0 to full load)
• Ripple and Noise: 20 mV RMS, 150 mV pk-pk
• Temperature Coefficient: 0.03%/°C
• Hold-Up Time: 100 msec at maximum output power and 210 VAC input (50 Hz); 20 msec at 220V input configuration
• Efficiency: 67% minimum (LFS-39 series range)
Protection
• Overcurrent limiting with automatic reset
• Overvoltage protection (non-crowbar, inverter shutdown type)
• Fan failure detection
• Short-circuit protection
• In-rush current limiting standard
• No overshoot at turn-on, turn-off, or power failure
– Key Features
• Remote sense for load-end voltage monitoring
• Remote programming: 10 kΩ/V nominal resistance, volt-per-volt scaling
• Remote on/off control via TTL-compatible logic (turn-off: 2.8–5.0V; turn-on: open circuit, short circuit, or 0–0.5V)
• Convection cooling; no forced-air dependency
– Physical Characteristics
Dimensions: 1.38 × 3.82 × 4.53 inches | Weight: 0.74 lbs net, 1.74 lbs shipped | Gray finish (Fed. Std. 266081)
– Typical Applications
Automated test equipment, distributed power systems, industrial control circuits, and embedded systems requiring low-noise 15V regulation with remote programmability and diagnostics.
