SG3525AP

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SG3525AP

+BOM

IC REG CTRLR BCK/PSH-PULL 16SOIC

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Specifications

Attribute Value
Package Tube
ProductStatus Active
OutputType Transistor Driver
Function Step-Down, Step-Up/Step-Down
OutputConfiguration Positive
Topology Buck, Push-Pull
NumberofOutputs 2
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 8V ~ 35V
Frequency-Switching 100Hz ~ 400kHz
DutyCycle(Max) 49%
SynchronousRectifier Yes
ClockSync Yes
ControlFeatures Enable, Soft Start
OperatingTemperature 0°C ~ 70°C (TA)
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width)

Overview

Description

The SG3525AP is a pulse width modulation (PWM) controller IC primarily used for switch-mode power supply (SMPS) and DC-DC converter applications. It is designed to provide precise control over power conversion processes with minimal external components. Key features include an internal oscillator, error amplifier, pulse-by-pulse current limiting, and an undervoltage lockout. The IC operates over a wide supply voltage range, typically from 8V to 35V, and can deliver both voltage and current mode control.
Its built-in oscillator can be easily synchronized with other devices, while the adjustable dead-time control feature ensures efficient power management and prevents cross-conduction in push-pull configurations. The SG3525AP supports both single-ended and push-pull mode outputs, making it versatile for various applications. Its high accuracy and stability make it ideal for use in industrial, telecom, and automotive power systems, where reliability and efficiency are critical. Overall, the SG3525AP is a robust and efficient solution for controlling power converters.

Equivalent

Equivalent products for the SG3525AP PWM controller chip include: TL494, UC3525, KA3525, and LM3525. These chips offer similar functionality for applications like switch-mode power supplies, inverters, and other power control systems. When considering alternatives, ensure to compare specifications like operating voltage, switching frequency, and output current to ensure compatibility with your specific application.

Features

The SG3525AP is a pulse width modulator (PWM) controller used in power supply and inverter applications. Key features include:
1. Input Voltage Range: The device operates over a wide input voltage range to accommodate different power supply levels.
2. Output Drive Capability: It provides a totem-pole output stage that can drive power MOSFETs or bipolar transistors directly.
3. Oscillator: It features a built-in oscillator with adjustable frequency, allowing for flexibility in design and synchronization with external systems.
4. Soft Start: The SG3525AP includes a soft start function to prevent inrush current during startup, enhancing system reliability.
5. Dead-Time Control: This feature allows for adjustable dead time between the outputs, preventing overlap and ensuring efficient performance in push-pull or half-bridge configurations.
6. Error Amplifier: An internal error amplifier is available for voltage regulation and feedback control.
7. Short-Circuit Protection: The device includes protection mechanisms to safeguard against overcurrent conditions.
These features make the SG3525AP suitable for a wide range of applications, including DC-DC converters, power inverters, and motor control systems.

Pinout

The SG3525AP is a pulse width modulation (PWM) controller IC commonly used in power supply and motor control applications. It comes in a 16-pin dual in-line package (DIP). Here is a brief description of its pin functions:
1. IN+: Non-inverting input of the error amplifier.
2. IN-: Inverting input of the error amplifier.
3. OSC OUT: Oscillator output.
4. RT: Timing resistor pin to set oscillator frequency.
5. CT: Timing capacitor pin to set oscillator frequency.
6. SYNC: Synchronization input.
7. DISCHARGE: Discharge pin for the timing capacitor.
8. SOFT START: Soft start control pin.
9. COMP: Compensation pin for error amplifier.
10. SHUTDOWN: Shutdown input.
11. GND: Ground.
12. VC: Supply for output stage.
13. VREF: Reference voltage output.
14. OUTPUT B: PWM output B.
15. VCC: Supply voltage.
16. OUTPUT A: PWM output A.
The SG3525AP is designed to provide efficient PWM control for various applications, operating between 8V and 35V.

Manufacturer

The SG3525AP is manufactured by STMicroelectronics. STMicroelectronics is a global semiconductor company that designs, develops, manufactures, and markets a wide range of semiconductor products and solutions. It serves various applications across sectors like automotive, industrial, personal electronics, communications equipment, and more. STMicroelectronics focuses on delivering innovative and sustainable technologies, emphasizing energy efficiency, security, and connectivity. The company operates worldwide, with a strong presence in Europe, Asia, and the Americas, and is known for its commitment to research and development, as well as its collaboration with customers to address specific needs and challenges.

Application

The SG3525AP is a pulse width modulation (PWM) controller commonly used in power electronics. Its application areas include:
1. Switching Power Supplies: It is used in the design of efficient DC-DC converters and AC-DC power supplies.
2. Inverters: Suitable for use in DC-AC inverters, particularly in renewable energy systems like solar inverters.
3. Motor Control: Employed in motor driver circuits for precise speed and torque control.
4. Battery Chargers: Utilized in charger designs for managing battery charging processes.
5. UPS Systems: Integrated into uninterruptible power supply systems to manage power conversion.
Its versatility and robust performance make it ideal for these applications.

Package

The SG3525AP is typically available in a Dual In-line Package (DIP) or a Plastic Leaded Chip Carrier (PLCC) package. These package types facilitate the integration of the PWM (pulse width modulation) controller in electronic circuits.

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