8:1 Ultra-Wide Input DC-DC Converters: Key Benefits & Applications

 

 

 

Abstract

      Discover the key benefits & applications of Cincon 8:1 ultra-wide input DC-DC converters. Simplify railway and industrial power designs with 9-75V.

 

Introduction: The Challenge of Complex Power Environments

      As electronic systems evolve rapidly today, power management faces unprecedented challenges. Normally, the input voltage of DC-DC power modules fluctuates within a specific range. However, in specialized applications like photovoltaic (PV) systems and Uninterruptible Power Supplies (UPS), the power system must maintain stable operation across an extremely wide voltage range. Furthermore, environmental interference spikes can superimpose onto the input voltage, impacting the power circuitry. In severe conditions, the input voltage may exceed rated design limits, leading to power module failure or performance degradation.

      Additionally, DC-DC power module inputs are frequently used in battery-powered applications. For instance, DC-DC converters are essential in motive power systems, PV systems, UPS, EPS (Emergency Power Supply), PV inverters, wind-solar hybrid controllers, power battery protection boards, and Battery Management Systems (BMS). Traditional power solutions are often constrained by narrow input voltage ranges, making it difficult to handle complex and dynamic power environments. Consequently, designers are forced to use multiple different models of DC-DC converters.

Breaking the Mold: The 8:1 Ultra-Wide Advantage

      In industrial, automotive, and railway systems utilizing 12V, 24V, and 48V power setups, traditional approaches require designing distinct power boards for each. This process is time-consuming and results in bloated inventories with various DC-DC converter models. To solve these pain points, Cincon has launched a series of 8:1 ultra-wide input DC-DC power modules. With a Vin of 9-75Vdc, these DC-DC converters can seamlessly adapt to standard nominal bus voltages of 12V, 24V, 36V, and 48V. The following series features 5 power ratings and comprehensive output voltage specifications.

For more information, check the datasheet.

Form Factor, Certifications, and Protections

      These series of DC/DC converters utilize industry-standard DOSA 1/4-brick and 1/2-brick packages. Taking the 1/4-brick series as an example, all models have passed electronic equipment certifications for railway systems, including EN 50155, EN 61373, and EN 44545-2. They also comply with UL/IEC 62368-1 2nd Edition safety standards (featuring 3KVac reinforced insulation for optimal protection), making them highly reliable power modules for Audio/Video and Information and Communication Technology (ICT) equipment. They offer a wide operating case temperature range of -40℃ to +105℃ (with optional -55℃ operating case temperature models available for 50W and 75W) and can operate stably at altitudes up to 5,000m. Built-in protections include Input Under-Voltage Lockout (UVLO), Over-Voltage Protection (OVP), Over-Temperature Protection (OTP), and Output Short-Circuit Protection (SCP).

 

Real-World Voltage Fluctuation Handling

      In practical 24Vin applications, if the input voltage surges to 60V, 70Vdc, or higher for extended periods (e.g., 10 seconds or more), an additional voltage clamping protection circuit is typically required at the input stage to keep the over-voltage within a safe range. By selecting an 8:1 input product, the system can operate continuously under abnormally high voltages without the need for an extra clamping circuit.

      Similarly, in 48Vin applications, if an abnormal transient voltage drop (brownout) occurs—such as the input suddenly dropping to 18V or even 9V—the output will continue to supply power without interruption.

 

Output Trimming, UVLO, and Hold-up Time

      Compared to the traditional ±10% output voltage trim range, this series allows engineers to adjust the output voltage via resistors from +15% to -20% of the nominal voltage (the 54V output model supports +10% to -20%). A typical configuration is shown below.

 

The CQB150W8 and CQB100W8 series include an advanced UVLO (Under-Voltage Lockout) protection feature. This prevents deep discharge of the front-end battery during operation, effectively protecting the customer"s overall system. A typical configuration is shown below.

 

Furthermore, the CQB150W8 and CQB100W8 series offers a "-B" model featuring a BUS pin dedicated to the hold-up time function. The BUS pin provides a safe voltage level, reducing the required voltage rating for the hold-up capacitor. This offers greater flexibility in capacitor selection and saves board space. In the event of an input power interruption, the CQB100W8 series utilizes the energy stored in capacitor C5 to sustain operation. A typical configuration is shown below.

 

Technological Breakthroughs and Efficiency

      Benefiting from technological advancements, major semiconductor manufacturers have made significant breakthroughs in power-stage MOSFETs and Diodes. By utilizing simulation software to estimate transformer and power device losses, our R&D engineers have synergistically optimized advanced power semiconductors with transformer inductance. This balances conduction losses and switching losses, minimizing total power dissipation. As a result, the modules deliver exceptional efficiency not only at the 36V intermediate voltage but also across the entire 12V, 24V, 36V, and 48V spectrum, ensuring high reliability and stability under varying input voltages. This capability proves that our 8:1 input DC-DC converters can seamlessly replace and upgrade conventional 2:1 and 4:1 input modules.

Contact Cincon if you need further support

 

Expanding the 8:1 Advantage to SIP-8 and DIP-24 Packages

Encouraged by the excellent market feedback on our higher-power 8:1 products, Cincon has decided to extend the benefits of ultra-wide input technology to the highly popular SIP-8 and DIP-24 form factors.

Cincon has developed a new line of SIP-8 ultra-wide input DC-DC power modules. The Cincon EC2SAW8, EC3SAW8, and EC4SAW8 isolated DC-DC converters offer power ratings from 1.65W to 6W and are fully compatible with multiple nominal input voltages, including 12V, 24V, and 48V. This series features an impressive 9-75VDC ultra-wide input voltage range and a high isolation voltage of up to 3000VDC. It guarantees reliable operation across a wide temperature range of -40℃ to +105℃, with no-load power consumption dropping as low as 0.144W. Equipped with Input Under-Voltage Lockout (UVLO), Output Short-Circuit Protection (SCP), and Over-Current Protection (OCP), it is an exceptionally cost-effective power solution.

Simultaneously, we have rolled out DIP-24 packaged 8:1 ultra-wide input DC-DC power modules. The Cincon EC3AW8 and EC4AW8 isolated DC-DC converters provide 1.98W to 6W of power, maintaining the same seamless compatibility with 12V, 24V, and 48V nominal systems. This series delivers high efficiency of up to 87% and robust 3000Vdc I/O isolation. It provides comprehensive safety features, including UVLO, Over-Voltage Protection (OVP), OCP, and continuous SCP. Notably, its EMI performance meets the EN55032 Class A standard without the need for any external components (and can easily achieve Class B compliance with a simple peripheral circuit).

 

 

All of these DC-DC converters are exceptionally easy to deploy, offering a highly adaptable "plug-and-play" solution—not only during the initial design phase but also whenever system input, output, or power rating specifications need to change. This flexibility ensures that every design is truly future-proofed and perfectly positioned for emerging market demands.

 

They are highly suitable for a wide range of critical applications, including:

      ‧ Railway communication(brick series only), control, and computing systems

      ‧ Industrial automation and robotics control

      ‧ 5G telecommunication systems

      ‧ Instrumentation and defense electronic systems

 

Contact for more support:sales@cincon.com