Compact and lightweight, High breakdown voltage, Surface mounting type# EE23TNUX Technical Documentation
## 1. Application Scenarios
### Typical Use Cases
The EE23TNUX is a high-performance ferrite core inductor primarily employed in power conversion circuits and EMI filtering applications . Typical implementations include:
- DC-DC Converters : Used in buck, boost, and buck-boost configurations for energy storage and ripple current smoothing
- Switch-Mode Power Supplies : Serves as output chokes in SMPS designs up to 100W
- Voltage Regulator Modules : Critical component in VRM circuits for microprocessor power delivery
- Power Line Filters : Common-mode and differential-mode noise suppression in AC/DC power inputs
### Industry Applications
Automotive Electronics :
- Engine control units (ECUs)
- Infotainment systems
- LED lighting drivers
- Advanced driver assistance systems (ADAS)
Consumer Electronics :
- Smartphone power management
- Laptop DC-DC conversion
- Gaming console power supplies
- IoT device power circuits
Industrial Systems :
- PLC power modules
- Motor drive circuits
- Industrial automation power supplies
- Renewable energy inverters
### Practical Advantages and Limitations
Advantages :
- High Saturation Current : 3.2A typical saturation current enables robust performance in power applications
- Low DC Resistance : 45mΩ maximum DCR minimizes power losses and thermal generation
- Excellent Temperature Stability : Operating range of -40°C to +125°C ensures reliability in harsh environments
- Shielded Construction : Reduced electromagnetic interference to adjacent components
- Automotive Grade : AEC-Q200 compliant for automotive applications
Limitations :
- Frequency Dependency : Performance degrades above 2MHz due to core material characteristics
- Size Constraints : EE23 footprint may be restrictive for space-constrained designs
- Cost Considerations : Higher performance comes at premium compared to standard inductors
- Saturation Concerns : Must be carefully derated for high current applications
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Pitfall 1: Saturation Under Load
- Problem : Inductor saturation at peak currents causing efficiency drops and potential failure
- Solution : Always design with 20-30% margin above maximum expected current
- Implementation : Use worst-case scenario calculations including temperature derating
Pitfall 2: Thermal Management
- Problem : Excessive temperature rise due to core and copper losses
- Solution : Ensure adequate airflow and consider thermal vias in PCB layout
- Implementation : Monitor temperature during prototype validation with thermal imaging
Pitfall 3: Resonance Issues
- Problem : Parasitic capacitance causing resonance at switching frequencies
- Solution : Select switching frequencies well below self-resonant frequency (typically >5MHz for EE23TNUX)
- Implementation : Characterize impedance vs frequency in actual circuit conditions
### Compatibility Issues with Other Components
Semiconductor Compatibility :
- Power MOSFETs : Compatible with most modern switching transistors (ensure dv/dt ratings align)
- Controllers : Works well with industry-standard PWM controllers (TI, Analog Devices, Maxim)
- Diodes : Schottky diodes recommended for optimal efficiency in rectification applications
Capacitor Interactions :
- Input Capacitors : Low-ESR ceramic capacitors recommended for high-frequency decoupling
- Output Capacitors : Combination of ceramic and electrolytic capacitors for optimal ripple performance
- Bypass Capacitors : 100nF ceramic capacitors should be placed close to inductor terminals
Magnetic Interference :
- Sensitive Components : Maintain minimum 5mm clearance from Hall sensors, current sensors, and RF components
- Other Inductors : Stagger placement to minimize mutual coupling effects
### PCB
