KA3524

Name: KA3524
Brand: Onsemi
Rating: 4.5 (10 reviews)
Author: Lisleapex

Voltage-mode PWM controller for power supply applications

5,103 Effective Inventory

KA3524

Effective Inventory5,103

Voltage-mode PWM controller for power supply applications

Manufacturer Part # : KA3524
Package/Case: DIP-16
Brand: Onsemi
Product Categories : DC DC Switching Controllers

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KA3524 DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

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KA3524 Details

The KA3524 is a PWM controller IC from ON Semiconductor, designed for DC-DC converters and SMPS applications. This device operates in fixed frequency pulse width modulation mode, making it suitable for various power management applications.

Pinout

(Package: DIP-16): The KA3524 is available in a 16-pin DIP package, providing easy integration into your circuit design.

(Tip: For detailed pinout information, please refer to the corresponding datasheet.)

Key Features

Fixed Frequency PWM Mode: Operates in fixed frequency pulse width modulation mode for reliable power management.
Internal Oscillator: Features an internal oscillator with frequency set by two external resistors, allowing for easy configuration.
Outputs up to 350mA: Provides sufficient current output for various power management applications.
Regulates Output Voltage: Regulates the output voltage with feedback control for precise voltage management.
Adjustable Dead-Time Control: Offers adjustable dead-time control for optimized performance and reliability.
Current Limiting and Thermal Shutdown Protection: Includes current limiting and thermal shutdown protection to prevent damage from overcurrent or overheating.
Low Standby Current Consumption: Designed for low standby current consumption, making it suitable for battery-powered applications.

Applications

Switching Power Supplies: Suitable for switching power supplies requiring precise voltage regulation and adjustable dead-time control.
DC-DC Converters: Ideal for DC-DC converters needing fixed frequency PWM mode operation and current limiting protection.
Battery Chargers: Used in battery chargers requiring low standby current consumption and thermal shutdown protection.
Voltage Regulators: Suitable for voltage regulators needing adjustable dead-time control and current limiting protection.

Where to Use

The KA3524 is suitable for various applications where precise power management, adjustable dead-time control, and thermal shutdown protection are required. This includes:

Battery-powered devices
Switching power supplies
DC-DC converters
Voltage regulators

How to Use

To use the KA3524, follow these steps:

Configure the internal oscillator using two external resistors.
Set the output current and voltage according to your application requirements.
Adjust the dead-time control as needed for optimal performance.
Ensure proper thermal shutdown protection is implemented to prevent damage from overheating.

Application Circuit

The application circuit diagram for the KA3524 illustrates how to connect the device to your specific power management application. It includes connections for power supply, ground, and output voltage lines, ensuring proper operation and reliable power management.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

UCC28051: A similar PWM controller IC from Texas Instruments offering comparable features and performance.
LTC3788: An alternative PWM controller IC from Linear Technology with equivalent functionality.

Complementary

The KA3524 can be complemented by other ON Semiconductor devices, such as the NCP1402, which offers additional features like overcurrent protection and thermal shutdown. When selecting complementary devices, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Manufacturer	onsemi	Product Category !	DC DC Switching Controllers
Series	-	Packaging !	Tube
Package-Case	Transistor Driver	Operating-Temperature	Step-Down, Step-Up/Step-Down
Output-Type	Buck, Flyback, Push-Pull	Function	Enable
Supplier-Device-Package	Positive, Isolation Capable	Number-of-Outputs	1
Topology	0.45	Voltage-Supply-Vcc-Vdd	No

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification KA3524 PDF Download

FAQs

What is KA3524?

The KA3524 is a pulse width modulation (PWM) controller IC commonly used in power supply and motor control applications. It allows for the precise control of switching power supplies and DC motor speed by modulating the width of the pulse signal.

How Does KA3524 Work?

The KA3524 works by comparing a reference voltage with a sawtooth waveform to generate a PWM signal. This signal is then used to control the duty cycle of a power switch, regulating the output voltage or motor speed. The IC can be configured for various modes of operation such as voltage mode and current mode control.

How Many Pins does KA3524 have and What are the Functions of the Pinout Configuration?

The KA3524 typically comes in a 16-pin dual in-line package (DIP). The pinout configuration includes:

VCC: Positive power supply pin.
GND: Ground pin.
COMP: Error amplifier output pin for external compensation.
OSC1, OSC2: Oscillator timing components pins.
RT, CT: Timing components for setting oscillator frequency and duty cycle.
DIS, SD, GATE: Control pins for various functions like disable, shutdown, and gate drive.
OUT: PWM output pin.

What are the Pros and Cons of KA3524?

Pros:

Flexible Control: Allows precise control of power supplies and motor speed.
Wide Operating Voltage Range: Can operate over a wide range of voltages.
Efficiency: Improves power efficiency in switching applications.
Protection Features: Includes protection circuits like overcurrent and thermal shutdown.
Cost-Effective: Provides cost-effective PWM control for various applications.

Cons:

External Components: May require external components for specific applications and tuning.
Complexity: Requires understanding of PWM principles for optimal use.
Noisy Operation: PWM operation may introduce electrical noise in sensitive systems.

Are There Any Equivalents/Alternatives to KA3524 for Recommendation?

The SG3524 from STMicroelectronics is a direct equivalent to the KA3524.
Alternatives to the KA3524 include the TL494 from Texas Instruments and the UC3842 from ON Semiconductor.