Gaia Converter has launched its latest innovation, the LGDS-600 series, a comprehensive family of Hi-Rel grade, DC-DC input bus conditioner. This input bus conditioner designates a range of 600 W military grade front end that enables and eases the construction of power architectures.

The LGDS-600 includes:

• A powerful voltage limiter for long-lasting surges up to 100 V_dc (LGDS600OH) and 200 V_dc (LGDS600PH)
• A 100 V_dc reverse polarity protection
• A soft-start function to limit inrush current
• An abnormal surge protection (ASP) to secure applications.

In addition, the LGDS-600 come with:

• A control function to handle power backup
• A bi-phase switching frequency generator for synchronization of downstream converters.
• Ultra-low series losses

As a consequence, the LGDS-600 requires only input EMI filtering to fully comply with most international input bus standards such as:

• MIL-STD-704 (all revisions)
• AECMA EN2282
• GAM-EG13B/AIR2021E
• DO160E cat A, B       
• MIL-STD-1275 (all revisions)

The input bus conditioner has three modes of operation:

• Normal operation: When the input bus voltage is within its steady-state range, the LGDS-600 acts like a buffer that transmits the input power to the DC/DC architecture with low losses.
• Power fail operation and low transient voltage: The power fail operation occurs when the input bus drops below its low voltage limit. An undervoltage lock-out raises a drive aux signal that can be used to switch the converter bus to a backup power source.
• Transient operation: The LGDS-600 clamps input transient, limiting its output voltage to the maximum value acceptable by downstream DC/DC architecture.

The modules are potted with a bi-component thermal conductive compound and packaged in a metallic case to ensure the module's integrity under severe environmental conditions.

General Characteristics

• Additional functions: backup source control, switching frequency synchronization generator
• Galvanic isolation input/output: non-isolated
• Power range: from 4 W to 600 W
• Protections: reverse polarity, over temperature
• Transient suppressor: 60, 80, 100, 202 V_dc
• RoHS-compliant

Key features

• ASP: Abnormal Surge Protection
• DEF-STAN-61.5 issue 6
• DO-160 C/D/E/F cat A, B and Z
• MIL-STD-1275 all revisions
• MIL-STD-704 A/D/E/F, EN2282, AIR2021E
• Transient suppressor for Avionics/Defense
• VG96916-5