The LM5037MT is a PWM controller with integrated dual gate drivers intended for use in high performance, highly efficient half-bridge power converters. This device, manufactured by Texas Instruments (formerly National Semiconductor), integrates numerous features designed to simplify the design and implementation of robust and efficient power supplies.

Applications

• Telecom power supplies
• Server power supplies
• Industrial power supplies
• High-density DC-DC converters
• Power amplifiers

Features

• Integrated high-side and low-side gate drivers
• Programmable oscillator frequency
• Adjustable dead-time
• Voltage mode control with input voltage feed-forward
• Programmable soft-start
• Cycle-by-cycle current limit
• Over-voltage protection (OVP)
• Thermal shutdown protection

Benefits

• Simplifies design and reduces component count with integrated gate drivers.
• Enables efficient and stable operation with voltage mode control and input voltage feed-forward.
• Protects the circuit from damage due to over-current, over-voltage, and over-temperature conditions.
• Allows customization of the switching frequency and dead-time for optimal performance.
• Ensures a smooth and controlled start-up with programmable soft-start.

Additional Details

The LM5037MT is specifically designed for half-bridge topologies and integrates the necessary gate drivers for both the high-side and low-side MOSFETs, greatly simplifying the layout and reducing external component count. The device utilizes voltage mode control, and also incorporates input voltage feed-forward, enhancing line transient response. The oscillator frequency is programmable, providing flexibility in choosing optimal switching frequencies for efficiency or size considerations. The adjustable dead-time control allows fine-tuning of the timing between the switching of the high-side and low-side MOSFETs to minimize switching losses. The programmable soft-start feature ensures a controlled start-up, preventing inrush currents and voltage overshoot. Cycle-by-cycle current limit provides protection against over-current conditions, while over-voltage protection (OVP) safeguards the circuit from excessive output voltage. The device also incorporates thermal shutdown protection, which disables the gate drivers if the die temperature exceeds a safe operating limit. All these features contribute to robust and reliable power converter design using the LM5037MT.