SG3525ADTR

The SG3525ADTR is a high-performance pulse width modulator (PWM) integrated circuit (IC) designed for use in a wide range of switching power supply and motor control applications. It offers a combination of features that make it an ideal choice for designers seeking to optimize performance, reliability, and cost-effectiveness.

Key Features

1. High-Performance PWM Controller: The SG3525ADTR employs advanced PWM control techniques to provide precise and stable output voltage or current regulation.
2. Adjustable Oscillator: The IC features an adjustable oscillator that allows the user to set the PWM frequency within a specified range. This feature provides flexibility in designing power supplies with different output requirements.
3. Internal Reference Voltage: The SG3525ADTR includes an internal reference voltage that is trimmed to ±1%, ensuring accurate and stable operation over a wide temperature range.
4. Error Amplifier: The on-chip error amplifier compares the feedback signal from the output with the internal reference voltage, and adjusts the PWM duty cycle to maintain the desired output voltage or current.
5. Soft-Start Circuitry: The IC incorporates built-in soft-start circuitry that limits the inrush current during startup, protecting the power supply and load from damage.
6. Undervoltage Lockout (UVLO): The SG3525ADTR features UVLO protection that disables the output when the input voltage falls below a specified threshold, preventing the power supply from operating in an unsafe condition.
7. Latching PWM Output: The PWM output of the SG3525ADTR is latched, meaning that once a PWM pulse is terminated, the output will remain off until the next clock pulse. This feature helps to prevent multiple pulses and ensures stable operation.
8. Totem-Pole Output Stage: The output stage of the SG3525ADTR is designed as a totem-pole configuration, capable of sourcing or sinking high currents, making it suitable for driving external power transistors or MOSFETs.
9. Package Type: The SG3525ADTR is typically packaged in a DIP-16 or surface-mount SOIC-16 package, depending on the specific version.

Applications

The SG3525ADTR is ideal for use in a variety of power supply and motor control applications, including:

• DC-to-DC converters
• AC-to-DC converters (offline power supplies)
• Motor speed controllers
• UPS systems
• Battery chargers

In summary, the SG3525ADTR is a versatile and high-performance PWM controller IC that offers a combination of features that make it an excellent choice for power supply and motor control designers. Its adjustable oscillator, internal reference voltage, error amplifier, soft-start circuitry, and UVLO protection provide robust and reliable operation, while its totem-pole output stage and compact package make it easy to integrate into various systems.