1. Introduction
The Hi-Link A1215S-2WR3 series is a compact, high-efficiency micro power DC-DC module power supply. It features a constant voltage input and an isolated, unregulated single output. This series is specifically designed for integration into on-board power systems that necessitate the generation of isolated voltages from the primary input power supply.
This product is ideally suited for applications where:
- The input power supply voltage is relatively stable (voltage variation range ±10% Vin).
- Isolation is required between the input and output (isolation voltage ≤ 1500VDC).
- The application has a low requirement for output voltage stability.
Typical applications include purely digital circuits, general low-frequency analog circuits, relay drive circuits, and data exchange circuits.
2. Key Features
- Constant Voltage Input, Isolated Unregulated Output, 2W Power
- High Isolation Voltage: 1500VDC
- Low quiescent current and high conversion efficiency
- Low Ripple/Noise: 30mVp-p (typical, 20MHz bandwidth)
- Wide Operating Temperature Range: -40°C to +85°C
- High Reliability: MTBF ≥ 3.5 million hours (3,500,000 Hrs)
- Output Short Circuit Protection: Sustainable short circuit protection with automatic recovery
- Compact SIP Package, constructed with a durable plastic housing
- International standard pin out for easy integration
3. Specifications
3.1 Product Series Overview (A12XXS-2WR3)
For the A1215S-2WR3 model:
- Input Voltage: 12V (Nominal), Range: 10.8V - 13.2V
- Output Voltage: ±15Vdc
- Output Current: ±67mA (Max), ±7mA (Min)
- Ripple and Noise: 30mVp-p (Typical), 80mVp-p (Max)
- Efficiency @ Full Load: 82% (Min), 86% (Typical)
- Maximum Capacitive Load: 100uF
3.2 Input Characteristics
| Item | Working Conditions | Min. | Typ. | Max. | Unit. |
|---|---|---|---|---|---|
| Input current (fully loaded/unloaded) | 5VDC input series | -- | 454/5 | --/10 | mA |
| 9V DC input series | -- | 250/5 | --/10 | ||
| 12DC input series | -- | 186/2 | --/5 | ||
| 15VDC input series | -- | 148/2 | --/4 | ||
| 24DC input series | -- | 92/1 | --/2 | ||
| Reflected ripple current | -- | 15 | -- | ||
| Impulse voltage (Isec.max) | 3.3VDC input series | -0.7 | -- | 5 | VDC |
| 5VDC input series | -0.7 | -- | 9 | ||
| 9VDC input series | -0.7 | -- | 15 | ||
| 12VDC input series | -0.7 | -- | 18 | ||
| 15VDC input series | -0.7 | -- | 21 | ||
| Input filter type | Capacitive filtering | ||||
| Hot plug | Not available | ||||
3.3 Output Characteristics
| Item | Working and testing conditions | Min. | Typ. | Max. | Unit. | |
|---|---|---|---|---|---|---|
| Output load | Load percentage | 10 | -- | 100 | % | |
| Output voltage accuracy | Refer to error envelope curve | -- | -- | ±15.0 | % | |
| Linear adjustment rate | Input voltage variation ±1% | 3.3VDC output | -- | -- | ±1.5 | % |
| Others | -- | -- | ±1.2 | |||
| Load regulation | 10%~100% Load | 3.3VDCoutput | -- | 18 | -- | % |
| 5VDCoutput | -- | 12 | -- | |||
| 9VDCoutput | -- | 8 | -- | |||
| 12VDCoutput | -- | 7 | -- | |||
| 15VDCoutput | -- | 6 | -- | |||
| 24VDCoutput | -- | 5 | -- | |||
| Ripple & Noise | Pure resistive load, 20MHz bandwidth, peak-to-peak | -- | 30 | 80 | mVp-p | |
| Temperature drift coefficient | Full load | -- | -- | ±0.03 | % / °C | |
| Output short circuit protection | Continuous short circuit protection, automatic recovery | |||||
3.4 General Characteristics
| Item | Working conditions | Min. | Typ. | Max. | Unit. |
|---|---|---|---|---|---|
| Insulation voltage | Input-output, test time is 1 minute, leakage current is less than 1mA | 1500 | -- | -- | VDC |
| Insulation resistance | Input-output, insulation voltage 500VDC | 1000 | -- | -- | MΩ |
| Isolation capacitor | Input-output, 100KHz/0.1V | -- | 40 | -- | pF |
| Operating temperature | Refer to temperature derating curve | -40 | -- | +85 | °C |
| Storage temperature | -40 | -- | +125 | °C | |
| Shell temperature rise during operation | -- | 25 | -- | °C | |
| Storage humidity | No condensation | 5 | -- | 95 | %RH |
| Pin soldering temperature | The solder joint is 1.5mm away from the shell, 10s | -- | -- | +300 | °C |
| On-off level | Full load, nominal voltage input | -- | 100 | -- | KHz |
| Shock | 10-55Hz, 10G, 30Min. along X, Y and Z | ||||
| Shell material | Black flame retardant heat resistant plastic (UL94V-0) | ||||
| Minimum time between failures | MIL-HDBK-217F@25°C | 3.5X106 | -- | -- | Hrs |
3.5 Characteristic Curves
4. Setup and Installation
The A1215S-2WR3 module is designed for through-hole mounting on a Printed Circuit Board (PCB). Proper installation is crucial for optimal performance and reliability.
4.1 Exterior Dimensions and Pin Definitions
Dimensions:
- Length: 19.5 mm
- Width: 7.0 mm
- Height: 10.0 mm
- Pin Spacing: 2.54 mm
- Row Spacing: 12.7 mm
- Tolerance: ±0.25 mm
Pin Definitions:
| Pin No. | Function |
|---|---|
| 1 | +Vin |
| 2 | -Vin |
| 3 | No Pin |
| 4 | -Vout |
| 5 | Com (Common Ground) |
| 6 | +Vout |
4.2 Suggested Printing Layout
For PCB design, adhere to the following guidelines:
- Raster Distance: 2.54 mm x 2.54 mm
- Hole Diameter: 1.0 mm
Ensure sufficient clearance around the module for proper heat dissipation and to prevent interference with other components.
4.3 Connection Guidelines
- Connect the positive input voltage (10.8V to 13.2V DC) to Pin 1 (+Vin).
- Connect the negative input voltage (ground) to Pin 2 (-Vin).
- Pin 3 is not used and should be left unconnected.
- Connect the negative output voltage to Pin 4 (-Vout).
- Connect the common ground for the output to Pin 5 (Com).
- Connect the positive output voltage to Pin 6 (+Vout).
- Ensure all connections are secure and properly soldered to prevent intermittent operation or damage.
- Verify input voltage stability within the specified ±10% range for optimal performance.
5. Operating Instructions
The A1215S-2WR3 is an unregulated DC-DC converter. This means its output voltage may vary slightly with changes in load and input voltage, within the specified accuracy limits.
- Power On: Apply the specified input voltage (10.8V to 13.2V DC) to the +Vin and -Vin pins. The module will immediately begin converting power.
- Load Connection: Connect your load to the +Vout, -Vout, and Com pins. Ensure the load current does not exceed the maximum specified output current of ±67mA.
- Output Monitoring: While the output is unregulated, it is recommended to monitor the output voltage and current to ensure it remains within the acceptable range for your application.
- Short Circuit Protection: The module features continuous short circuit protection with automatic recovery. In case of a short circuit on the output, the module will protect itself and attempt to recover once the short is removed.
- Temperature Considerations: Operate the module within the specified operating temperature range of -40°C to +85°C. Refer to the temperature derating curve (Figure 6) for performance at extreme temperatures.
6. Maintenance
The Hi-Link A1215S-2WR3 module is designed for long-term, maintenance-free operation under normal conditions. However, adhering to general electronic component care practices can extend its lifespan:
- Cleanliness: Keep the module and surrounding PCB free from dust, dirt, and moisture. Use a soft, dry brush or compressed air for cleaning if necessary.
- Environmental Conditions: Ensure the module operates within its specified temperature and humidity ranges. Avoid exposure to corrosive gases or excessive vibration.
- Inspection: Periodically inspect the solder joints and connections for any signs of damage, corrosion, or loose connections.
- Avoid Overload: Do not exceed the maximum specified output current to prevent stress on the module components.
7. Troubleshooting
If you encounter issues with your A1215S-2WR3 module, consider the following troubleshooting steps:
- No Output Voltage:
- Verify that the input voltage is present and within the 10.8V to 13.2V DC range.
- Check the polarity of the input connections (+Vin, -Vin).
- Ensure there is no short circuit on the output pins (+Vout, -Vout, Com). The module has short circuit protection, but a persistent short may prevent normal operation.
- Inspect solder joints for cold joints or bridges.
- Incorrect Output Voltage:
- Confirm the input voltage is stable and within the specified range. Fluctuations in input voltage can affect the unregulated output.
- Check the load current. If the load is too high or too low (outside 10%-100% range), the output voltage accuracy may deviate.
- Ensure the ambient temperature is within the operating range. Extreme temperatures can affect performance.
- Excessive Ripple/Noise:
- Check for proper grounding and PCB layout. Long traces or ground loops can introduce noise.
- Ensure the capacitive load at the output is within the maximum specified 100uF.
- Verify that the input power supply itself is clean and free of excessive ripple.
- Overheating:
- Ensure adequate ventilation around the module.
- Verify that the load current does not exceed the maximum rating.
- Check the ambient temperature.
8. User Tips
- Input Filtering: Although the module has capacitive input filtering, adding external input capacitors (e.g., electrolytic or ceramic) close to the module's input pins can further improve input stability and reduce noise, especially in noisy environments.
- Output Filtering: For applications requiring very low ripple or highly stable output, consider adding external low-ESR capacitors and/or a small inductor at the output.
- Thermal Management: While the module has a good operating temperature range, for continuous operation at high loads or elevated ambient temperatures, ensure proper airflow or consider heat sinking if necessary to maintain the shell temperature rise within typical limits.
- PCB Layout: Keep input and output traces as short and wide as possible to minimize parasitic inductance and resistance, which can affect performance and noise.
9. Warranty and Support
The Hi-Link A1215S-2WR3 DC-DC Power Supply Module comes with a 2-year warranty from the date of purchase, covering defects in materials and workmanship under normal use. This warranty does not cover damage caused by misuse, unauthorized modification, improper installation, or operation outside the specified environmental and electrical limits.
For technical support, inquiries, or warranty claims, please contact Shenzhen Hi-Link Electronics Co., Ltd. directly:
- Website: www.hlktech.net
- Email: stella@hlktech.com
- WhatsApp: +86 15986863266
Please provide your product model (A1215S-2WR3) and a detailed description of the issue when seeking support.
