SG3524 / UC3524 Regulating Pulse Width Modulator (SG 3524) [Original]

SG3524 / UC3524 Regulating Pulse Width Modulator (PWM) Controller IC, 16-Pin DIP

The SG3524 / UC3524 is a Regulating Pulse Width Modulator (PWM) controller IC. It provides control circuitry for power supply designs. This monolithic IC is housed in a 16-pin DIP package. It incorporates a precise voltage reference, error amplifier, and stable oscillator. The IC includes a PWM, pulse steering flip-flop, and dual alternating output switches. Built-in current-limiting and shut-down circuitry provide protection. It operates within a 0°C to +70°C temperature range. Supply voltage range is 8V to 40V.

Specifications:

• Supply Voltage Range: 8V to 40V
• Output Type: Dual Alternating, Single-Ended or Push-Pull
• Operating Temperature: 0°C to +70°C
• Package Type: 16-Pin Dual In-Line Package (DIP)
• Line Regulation: 0.2% Max
• Load Regulation: 0.2% Max
• Temperature Stability: 1% Max Variation
• Internal Reference Voltage: 5.1V (Typical)
• Oscillator Frequency: Up to 300 kHz
• Integrated Functions: Voltage Reference, Error Amplifier, Oscillator, PWM, Flip-Flop, Output Switches, Protection Circuitry

Key features and benefits:

• Monolithic integrated circuit for power control.
• Integrated voltage reference, error amplifier, and oscillator.
• Built-in pulse-width modulator and pulse steering flip-flop.
• Dual alternating output switches.
• Current-limiting and shut-down protection circuitry.
• Supports single-ended or push-pull output configurations.
• Line and load regulation of 0.2% maximum.
• Temperature stability of 1% maximum variation.

Applications:

• Switching regulators (positive and negative polarity).
• Transformer-coupled DC-to-DC converters.
• Transformerless voltage doublers and polarity converters.
• Uninterruptible Power Supplies (UPS) and battery chargers.
• General power control and inverter applications.

Frequently Asked Questions:

Q: Can the SG3524 / UC3524 replace other PWM controllers?
A: The SG3524 and UC3524 are functionally equivalent. Compatibility with other PWM controllers depends on pinout, electrical characteristics, and application requirements.

Q: What is the maximum output current for the SG3524 / UC3524?
A: The datasheet specifies the output switches can sink/source up to 100mA. External drivers are required for higher current loads.

Q: Is this IC suitable for both positive and negative switching regulators?
A: Yes, the SG3524 / UC3524 supports switching regulators for both positive and negative polarity applications.

Q: What is the typical operating frequency range?
A: The internal oscillator can be configured for frequencies up to 300 kHz.

Package Includes:

*Image shown is a representation only.

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