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📌 Product Overview
The XL815M is a high-performance Photo Darlington transistor manufactured by International Rectifier. It provides robust electrical isolation between input and output circuits, making it ideal for signal transmission and feedback control in demanding electronic systems. Its core design focus is on ensuring stable power supply operation and reliable fault signal transmission, particularly in applications requiring high-voltage isolation and environmental durability.
🔧 Typical Applications
- Switching Power Supply (SMPS) feedback control loops
- Photovoltaic energy storage systems
- Industrial automation control and PLC interfaces
- Motor control and relay drive circuits
- Data collection and inverter protection circuits
- Home appliance power management systems
⚙️ Key Technical Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Current Transfer Ratio | CTR | 600 ~ 7500 | % |
| Forward Voltage | VF | 1.2 Typ. | V |
| Collector-Emitter Saturation Voltage | VCE(sat) | 0.8 Typ. | V |
| Isolation Capacitance | Cf | 0.6 Typ. | pF |
| Cut-off Frequency | fC | 6 Typ. | kHz |
🔒 Absolute Maximum Ratings & Process Limits
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Isolation Voltage | VISO | 5000 | Vrms |
| Collector-Emitter Voltage | VCEO | 40 | V |
| Forward Current | IF | 60 | mA |
| Total Power Dissipation | PTOT | 200 | mW |
| Operating Temperature | TOPR | -55 ~ +110 | °C |
| Soldering Temperature | TSOL | 260 | °C |
📦 Package, Dimensions & Assembly Notes
The XL815M is available in a DIP4-M package. It is a lead-free, environmentally compliant component with a UL94V-0 flammability rating. Assembly requires careful thermal management, with a recommended reflow soldering profile featuring a peak temperature of 260°C for a maximum of 30 seconds. Hand soldering is permissible for rework but must be performed at 360°C for no more than 3 seconds per joint to prevent damage to the device.
🚀 Sourcing & Supply Considerations
💡 Ensure procurement from authorized distributors to guarantee authenticity. The XL815M is available in tape and reel (SMD4) and tube packaging for automated and manual assembly processes. Lead times and stock levels should be verified with suppliers for production planning. Cross-referencing with alternative Photo Darlington devices may be necessary for BOM flexibility.
❓ FAQ
Q: What does the 'M' in XL815M signify?
A: The 'M' denotes the package type, specifically the DIP4-M variant, which is a modified DIP package suitable for certain manufacturing processes.
Q: What is the typical Current Transfer Ratio (CTR) for the XL815M?
A: The CTR is not a single fixed value but a range, specified as 600% to 7500% at IF=1mA and VCE=2V, allowing for binning and selection based on gain requirements.
Q: Can the XL815M be used in a high-temperature environment?
A: Yes, the device has a wide operating temperature range of -55°C to +110°C, making it suitable for demanding industrial and automotive applications.
Q: What is the maximum isolation voltage rating?
A: The XL815M offers a high isolation voltage of 5000Vrms, a key parameter for protecting low-voltage control circuits from high-voltage main power stages.
Q: Is the XL815M RoHS compliant?
A: Yes, the XL815M is an environmentally friendly product, compliant with CQC, UL, and VDE requirements, and is manufactured with a halogen-free molding compound.
