PMA Ltd. PS-V480020 DC-DC Converter Module

The PMA Ltd. PS-V480020 is a compact DC-DC converter module designed for telecom and telecommunications equipment applications. It accepts a wide input voltage range of -48 V DC to -60 V DC (nominal -48 V or -60 V systems) with a maximum input current of 8 A, and delivers multiple isolated or regulated DC output rails: 5.1 V DC at up to 35 A, 3.4 V DC at up to 40 A, and 1.2 V DC at up to 6 A. The total maximum output power is 200 W, making it suitable for powering digital boards, processors, FPGAs, ASICs, or other low-voltage circuitry in carrier-grade systems.This power module performs efficient power conversion from the standard telecom -48 V DC battery or rectifier bus to the multiple low-voltage rails required by modern telecom line cards, baseband processing units, or interface boards. It incorporates synchronous rectification, advanced control circuitry, and protection features including input undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), overtemperature protection (OTP), and short-circuit protection on all outputs to ensure reliable operation and system safety.
The PS-V480020 is engineered for hot-plug or live-insertion capability in redundant power architectures commonly used in telecom subracks and shelves. It supports parallel operation or N+1 redundancy when multiple modules are deployed, with built-in current sharing and OR-ing functionality (external or internal depending on configuration). Efficiency is optimized across the load range to minimize heat dissipation and operational costs in densely packed equipment.
The module features industry-standard input and output connectors or pins compatible with backplane or motherboard mounting. Status and control signals (such as Power Good, Enable, and fault alarms) are provided via dedicated pins for integration with the system management board or supervisory circuitry. Thermal management is achieved through a baseplate or heatsink mounting surface, allowing conduction cooling or forced-air cooling depending on the host chassis design.
Environmentally, the PS-V480020 is built for central office and outdoor cabinet deployment, with an operating temperature range typically from -5°C to +70°C (or wider, depending on derating) and humidity tolerance up to 95% non-condensing. It complies with relevant telecom power standards for electromagnetic compatibility (EMC), surge immunity, and safety (including isolation between input and outputs where applicable).
In deployment, the module is installed directly onto the target circuit board, backplane, or dedicated power shelf slot. Input power is supplied from the -48 V DC distribution bus, while outputs connect to the load circuitry via low-inductance paths to maintain voltage regulation under dynamic loads. Proper installation includes adequate airflow or heatsinking, secure mechanical mounting, and verification of input polarity and grounding.
Maintenance involves monitoring output voltages and Power Good signals through the system management interface, as well as periodic thermal and visual inspection. The unit contains no user-serviceable parts; faulty modules are replaced as complete assemblies. Diagnostics are supported via LED indicators (if equipped) or alarm contacts passed to the shelf controller.
This DC-DC converter module from PMA Power Systems Development provides a reliable, compact power solution for sustaining and upgrading legacy and current-generation telecom equipment still in service within operator networks, delivering stable multi-rail power conversion from the standard -48 V DC infrastructure.