Texas Instruments LM5026 – Wide Input Range Current Mode PWM Controller
The LM5026 by IC Manufacturer is a high-voltage PWM controller designed for use in isolated power supply applications. It implements a peak current-mode control architecture ideal for flyback, forward, and push-pull topologies. With a wide input range of 8V to 100V, LM5026 supports flexible operation in a variety of telecom, industrial, and distributed power systems.
Key Operating Characteristics
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 8 to 100 | V |
| UVLO Threshold (On/Off) | 14.2 / 7.4 | V |
| Gate Driver Output | 1.0 | A |
| Max Duty Cycle | 90 | % |
| Operating Frequency | Programmable, up to 1 | MHz |
| Package | SOIC-16 | – |
Integrated Features and Functional Benefits
- High Voltage Start-Up: Enables fast and efficient power-up directly from high-voltage rails without external biasing circuits.
- Current Mode Control: Enhances loop response and provides inherent overcurrent protection in forward and flyback converters.
- Soft-Start and Fault Handling: Programmable soft-start, hiccup mode, and cycle-by-cycle current limiting for enhanced protection.
- Synchronizable Oscillator: Allows synchronization with external clocks to reduce system-level EMI.
Typical Applications
- Isolated DC-DC converters for telecom systems
- Industrial power modules
- Battery charging systems
- Distributed power architectures
- AC/DC front-end converters
Frequently Asked Questions (FAQ)
What type of topologies can the LM5026 support?
The LM5026 supports forward, flyback, and push-pull topologies, making it highly versatile for isolated power design in industrial and telecom environments.
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Does the LM5026 include soft-start capability?
Yes, it features programmable soft-start functionality to reduce inrush current and provide controlled output voltage ramp during startup.
Can the LM5026 drive external MOSFETs directly?
Yes, it integrates a 1A gate driver capable of directly driving external N-channel MOSFETs in high-speed switching applications.
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Is this device suitable for wide input voltage systems?
Absolutely. The 8V to 100V input range makes it compatible with a wide variety of voltage sources, especially in telecom and industrial systems.
What protection features are integrated into the LM5026?
It offers undervoltage lockout (UVLO), overcurrent protection, and hiccup mode fault response, ensuring safe operation under abnormal conditions.
