Cosel ZS32405 DC-DC Converter: 3.3W 5V Isolated Output
Streamlining Power Design with an Integrated, Compact Solution
The Cosel ZS32405 DC-DC converter simplifies board-level power architecture by integrating comprehensive protection and remote control into a minimal footprint. Delivering a precisely regulated output from a wide input range, it is engineered for designers seeking to accelerate development and enhance system reliability without extensive external circuitry. Its feature set directly addresses the challenge of delivering stable power in complex, space-constrained industrial and communications equipment.
- Core Specifications: 3.3W Output Power | 18-36VDC Input Range | 5V @ 0.6A Output
- Key Engineering Benefits: Reduced external component count. Simplified system power sequencing.
Core Specifications for System Evaluation
The technical parameters of the ZS32405 are specified to support precise system integration. The values presented here are derived from the official manufacturer's documentation and provide a foundation for electrical and thermal analysis. For comprehensive details, including performance graphs and application notes, please download the official datasheet.
| Parameter Category | Characteristic | Value |
|---|---|---|
| Input Specifications | Voltage Range (DC) | 18 - 36 V |
| Nominal Voltage | 24 V | |
| Input Current (at max load) | 0.19 A (Typ) | |
| Output Specifications | Output Voltage | 5 V |
| Output Current | 0 - 0.6 A | |
| Output Power | 3.3 W | |
| Line & Load Regulation | 20mV & 40mV (Typ) | |
| Protection & Control | Overcurrent Protection (OCP) | Works at 105% of rated current or more, intermittent operation |
| Overvoltage Protection (OVP) | Built-in | |
| Remote ON/OFF | Logic controlled (L level or Open: ON, H level: OFF) | |
| Isolation & Environmental | Isolation Voltage | 500 VAC for 1 minute (Input-Output) |
| Operating Temperature Range | -20 to +71 °C (Derating required) |
Note: All specifications are based on an ambient temperature of 25°C unless otherwise stated. System designers must consult the manufacturer's datasheet for derating curves and detailed application guidance.
Accelerating Design Cycles in Modern Systems
The trend towards modularity in industrial automation and telecommunications places significant pressure on development timelines. What is the ZS32405's primary function in this context? It operates as a pre-engineered power block that reduces design risk and validation time. By integrating features like a wide input range and remote on/off control, it allows engineering teams to focus on core application logic rather than developing and qualifying discrete power conversion and management circuits. This approach not only shrinks the PCB footprint but also streamlines the supply chain and simplifies the bill of materials (BOM), offering a strategic advantage in competitive markets.
Deployment Scenarios: Where Integration Matters
The value of the Cosel ZS32405 is most evident in applications where board space, reliability, and system-level control are intertwined design constraints. Its compact Single In-line Package (SIP) is a key enabler for high-density layouts.
- Industrial Control Systems: Provides isolated and regulated 5V power for microcontrollers, sensors, and communication interfaces (e.g., RS-232/485) directly from a 24V industrial bus. The remote on/off feature facilitates low-power standby modes.
- Process Automation Equipment: Powers local I/O modules and data acquisition nodes. The inherent overcurrent and overvoltage protection enhances the robustness of distributed control nodes, preventing fault propagation.
- Telecommunications Hardware: Delivers clean, isolated power for auxiliary circuits in networking equipment, where stability and a small form factor are essential design criteria.
For space-constrained industrial controllers requiring a regulated 5V rail from a noisy 24V bus, the ZS32405's integrated control and wide input range make it a superior choice over discrete solutions.
Data for Sourcing: ZS32405 in Context
When evaluating DC-DC converters, comparing key integration features alongside primary electrical specifications provides a clearer picture for sourcing decisions. The ZS32405 is distinguished by its combination of a standard power rating with built-in control and protection functions, a set of features not universally present in all modules of this class. The table below places some of its attributes in context for engineering and procurement teams.
| Feature | Cosel ZS32405 | Typical Design Consideration |
|---|---|---|
| Package Type | Single In-line Package (SIP) | Optimized for minimal PCB area consumption; ideal for vertical mounting. |
| Remote ON/OFF Control | Integrated (RC Pin) | Eliminates the need for external relays or pass transistors for power sequencing, reducing BOM cost and complexity. |
| Protection Suite | Built-in OCP & OVP | Provides a baseline of system safety without requiring designers to specify, source, and qualify external protection components. |
For systems that require a different power level or configuration, related components such as the BSM50GP60 may offer alternatives for different design requirements.
Anatomy of an Integrated Power Solution
At its core, the Cosel ZS32405 is an isolated DC-DC converter, a fundamental building block in modern electronics. Its function can be compared to a miniature, intelligent power substation on a circuit board. What protection is built-in? It features integrated overcurrent and overvoltage protection circuits. The device takes a wide, semi-regulated 24V nominal input and, through high-frequency switching and magnetic isolation, transforms it into a stable, low-noise 5V output suitable for sensitive digital logic. The isolation barrier, rated at 500VAC, is crucial for safety and for breaking ground loops in large systems, a common source of noise and interference. Think of this isolation as an electrical firewall, allowing power to cross but blocking unwanted electrical noise and hazardous fault currents from passing between the input and output sides. This integration of conversion, regulation, and protection into a single, tested component is the key to its role in simplifying system design.
Frequently Asked Questions
1. What is the function of the 'RC' terminal on the ZS32405?
The Remote Control (RC) terminal allows a system's microcontroller or logic circuit to turn the DC-DC converter on and off. Applying a logic high signal (as defined in the datasheet) to this pin will shut down the converter's output, placing it in a low-power state. Leaving the pin open or pulling it to logic low enables normal operation. This feature is essential for implementing energy-saving strategies and ensuring proper power-up/power-down sequencing in complex systems.
2. How does the integrated overcurrent protection (OCP) behave, and does it require an external fuse?
The built-in overcurrent protection is designed to safeguard the converter from damage due to excessive loads or short circuits. According to the datasheet, it activates when the load current reaches approximately 105% or more of the rated maximum. The protection works in an intermittent or "hiccup" mode, where it will attempt to restart periodically until the fault condition is removed. While this protects the module itself, it is always best practice in system design to include an external fuse at the input, sized appropriately to protect the upstream wiring and meet overall system safety standards like those from UL or IEC.
For further technical inquiries or to discuss your specific application needs, please contact our engineering support team.
