The Lambda/TDK/EMI LQ series delivers precision regulated DC power for demanding industrial, laboratory, and automated test equipment environments. Built on multi-function voltage regulator ICs with integrated thermal management, these units operate in Constant Voltage or Constant Current mode with automatic crossover. All models include a digital panel meter for real-time output voltage and current monitoring via selector switch. Convection cooling eliminates fan noise—critical for sensitive test applications. Backed by a 5-year guarantee, the LQ series prioritizes stability and reliability across extended operating periods.
Technical Specifications
Voltage Regulation:
• Line regulation (LQ): 0.005% + 0.5 mV across 105–132 VAC input
• Load regulation (LQ): 0.005% + 0.5 mV from 0 to rated DC voltage
• Temperature coefficient (LQ): ±(0.005% V₀ + 10 µV)/°C with external programming resistors
• Remote sensing provision available to compensate for output lead resistance effects
Output Quality:
• Ripple and noise (20 MHz bandwidth): 1 mV peak-peak, 150 µV RMS (300 µV on LQ-415/LQD-425)
• Automatic current limiting with adjustable threshold protects against overload conditions
• Thermal protection via self-resetting thermostat
Input & Power:
• AC input: 105–132 VAC standard; optional “V” (187–242 VAC) and “V1” (205–265 VAC) configurations
• Frequency: 47–440 Hz; 10% output derating at 50 Hz
• Fan-free convection cooling design
– Key Features
• CV/CC operation with automatic mode crossover
• Series/parallel capability for master-slave tracking to common reference
• Digital panel meter standard on all units (LPT models feature separate volt and ammeters per output)
• Integrated chip temperature regulation ensures stable operation over temperature
– Typical Applications
• Low-noise automated test equipment (ATE)
• Laboratory instrumentation and precision measurement systems
• Industrial power applications requiring consistent DC output
• Multi-unit systems utilizing series/parallel stacking
– Compatibility & Integration
LQ series models include LQ-410, LQ-410S, LQ-411, LQ-412, LQ-413, LQ-415, LQ-520–524, LQ-530–534, LQD-420–425, and LPT variants. Remote sensing terminals and master-slave operation support modular system configurations.
