SG3525AN Pulse Width Modulator (PWM) Controller – Versatile Control for Power Supplies

Description

The SG3525AN is a high-performance, fixed-frequency pulse width modulator (PWM) control circuit designed for a wide range of power supply applications. Offering exceptional versatility, this IC is specifically optimized for driving power MOSFETs in switching power supplies, DC-to-DC converters, and motor control circuits. It provides all the necessary features to implement a robust control loop, including an on-chip voltage reference, an error amplifier, a programmable oscillator, and a wide-range PWM comparator.

Engineered for high reliability, the SG3525AN features a sophisticated shutdown circuit that can quickly disable the outputs in the event of an overcurrent or fault condition. With its push-pull output stage capable of sourcing or sinking up to 500mA, it provides direct drive for power transistors without requiring additional buffer stages. Housed in a standard DIP-16 package, this PWM controller is an industry-standard choice for professional engineers and power electronics hobbyists needing precise and dependable control over their power conversion topologies.

Key Features

• Versatile PWM Control: Provides comprehensive control features for various switching power supply topologies.
• High-Current Output Stage: Features a totem-pole output capable of sourcing/sinking 500mA, ideal for directly driving power MOSFETs.
• Integrated Safety: Includes a dedicated shutdown circuit for rapid response to system faults and overcurrent scenarios.
• Precision Reference: On-chip trimmed reference ensures stable control performance across different operating conditions.
• Wide Operating Range: Supports input voltages up to 35V, offering flexibility for diverse power design requirements.

Application

• Switching Power Supplies (SMPS): Essential for controlling the primary-side switching in both off-line and DC-to-DC converters.
• DC-to-DC Converters: Provides precise PWM signaling for buck, boost, and bridge converter designs.
• Motor Control: Can be configured to provide PWM signals for efficient speed control in DC motor systems.
• Inverter Circuits: A standard building block for driving bridge-based power stages in high-efficiency inverters.
• Custom Prototyping: A fundamental, “must-have” component for any engineer building high-performance, high-current custom power electronics.

Package Includes

• 1 x SG3525AN 35V Adjustable Pulse Width Modulator (PWM) Controller IC (DIP-16)

Technical Specifications

Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.