The Eurotech ACS-5125 is a 25W isolated power supply module. The module supplies +5V @ 5A with overload protection and without any de-rating. Resistance to high levels of shock and vibration are a result of the mechanical solutions adopted in this ruggedised PC/104-Plus compliant (except for component heights) module: these include the use of the PCB for heat dissipation, component selection and extensive use of SMD components.
Operation mode
The ACS-5125 features a DC/DC converter that provides for well-controlled outputs with no overshoot and control functions such as voltage trim, remote sense and inhibit. It can also generate an over temperature warning signal that gives user control over the temperature shutdown function of the converter via an I2C interface. In conjunction with the DC/DC converter, the ACS-5125 can also be equipped with an EMC filter against conducted susceptibilities, surges and spikes.
Protection devices
In addition, the power supply construction allows for the EMI filter, DC/DC converter and the heat dissipating protection devices to be mounted on the top or on the bottom side of the board. This allows for the maximum configuration flexibility when integrating the ACS-5125 in a system and easily supports the use of structural heat sinking enabling reliable temperature operation (-40 to +85 °C) without any active cooling.
Standards compliance
The ACS-5125 meets requirements of EC low voltage directives for CE compliance. When the power supply module only features the DC/DC converter, it meets the conducted emission and immunity requirements of MIL-STD-461E (EMC performance) and MIL-STD-810F (environmental performance). When the EMC filter is also mounted, the ACS-5125 additionally complies with MIL-STD-1275A/B/C & MIL-STD-704 (emission and immunity performance).
Architecture:
General Features:
- Onboard filtered DC/DC converter
- Onboard Digital Temperature sensor (National Semiconductor LM75) via an I2C interface
- Over temperature shutdown at 102°C
- User accessible 3A mini-fuse
- Rth case-ambient: 9.3°C/W
Voltage Input:
- +15.5 V DC to +40V DC (50V DC for 1s)
Voltage Output:
Power Output:
- +5V@ 5A (without de-rating)
- Peak power output +-5V/5A up to +85°C without structural heat sinking
Input Protection:
- Transient and reverse voltage protection
- Reverse voltage protected up to –60V DC
- Input protected with multi-stage voltage suppressors and filters
Output Protection:
Isolation:
- 1500V input/case
- 1000V input/case
- 500V output/case
RoHS:
- Fully RoHS (2002/95/CE) Compliant
Power Supply:
Efficiency:
- 83% typical on 5V (at full load)
Bus:
- PC/014-Plus (PCI)
- PC/104 (ISA)
Mechanical:
- Dimensions: 90 x 96 mm (3.6” x 3.8”)
- Height: 27 mm (1.1”)
Operating Temperature:
- -40 to +85°C (standard)
- -55 to 100°C (extended)
- 100°C (maximum base plate temperature)
Humidity:
MTFB:
- 130,000+ hours (MIL-HDBK-217 GM at 25°C)
Options:
- Conformal coating
- Mechanical adaptations for different system configurations