The Lambda LK344A-FM is a laboratory-grade programmable power supply delivering precise constant voltage/constant current operation across 3–24 VDC at 4.0 A. Built for bench and system integration, this half-rack unit combines exceptional line and load regulation (0.015% or 1 mV) with low ripple and noise (500 µV RMS) to meet demanding test and measurement requirements. Convection cooling eliminates external heat management, while front-panel coarse and fine voltage and current controls enable rapid setup and adjustment. Remote sensing corrects for lead-resistance losses, and automatic electronic current limiting with user-adjustable protection guards against overload conditions. The LK344A-FM supports series and parallel operation for expanded capability, accepts 105–132 VAC input (47–63 Hz), and delivers repeatable performance across industrial and military environments. Brushed aluminum construction with clear anodized finish and grey inlay provides laboratory durability.
Technical Specifications
Electrical Performance
• Output voltage: 3–24 VDC adjustable (6.0 VDC nominal)
• Output current: 4.0 A across entire voltage range
• Line and load regulation: 0.015% or 1 mV (whichever is greater)
• Ripple and noise: 500 µV RMS (either terminal grounded)
• Temperature coefficient: 0.015%/°C
• Constant current regulation: <10 mA or 0.1% (whichever is greater) for line variation 105–132 VAC and full load change
Input Specifications
• AC input voltage: 105–132 VAC
• Frequency: 47–63 Hz (derate 10% for 50 Hz operation)
Remote Programming
• Voltage control: 1 V per volt
• Resistance control: 200 Ω/V nominal
– Key Features
• Constant voltage/constant current architecture
• Convection cooling—no external heat sinking or blowers required
• Adjustable electronic current limiting with fuse backup
• Remote sensing for lead-loss compensation
• Front-panel voltmeter and ammeter
• No voltage spikes or overshoot on turn-on, turn-off, or power failure
• Series and parallel operation supported
• Military environmental compliance: MIL-T-4807A (vibration), MIL-E-4970A (shock, altitude), MIL-STD-819 (humidity), MIL-E-5272C (temperature shock)
• Dimensions: 5-3/16" × 8-3/8" × 16"
– Typical Applications
Bench power for component testing, automated test equipment, prototype development, and field service applications requiring stable, regulated DC output with remote control capability.
– Compatibility & Integration
The LK344A-FM belongs to Lambda's LK series, a family of modular lab supplies designed for standalone operation or integration into larger test systems. Remote programmability via voltage or resistance input enables integration with control systems and automated test sequences.
