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KA3524
Voltage-mode PWM controller for power supply applications
KA3524
Voltage-mode PWM controller for power supply applications
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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!
Details
The KA3524 is a pulse width modulation controller IC that is designed for use in switching power supplies and voltage regulators. It features an error amplifier, a voltage reference, a sawtooth oscillator, and a comparator in a single package. The error amplifier compares the output voltage of the power supply with a reference voltage and adjusts the duty cycle of the PWM signal accordingly to regulate the output voltage. The voltage reference provides a stable reference voltage for the error amplifier to compare against. The sawtooth oscillator generates a triangular waveform that is used for pulse width modulation, while the comparator compares the sawtooth waveform with the error signal and generates a PWM signal based on the comparison.The KA3524 has a wide operating voltage range of 8V to 35V, making it suitable for a variety of applications. It also has built-in protection features such as overcurrent protection and thermal shutdown to ensure the safe operation of the power supply. Additionally, the KA3524 can operate at frequencies up to 100kHz, allowing for efficient switching operation.
Key Features
- Operates in fixed frequency pulse width modulation mode
- Internal oscillator with frequency set by two external resistors
- Outputs up to 350mA
- Regulates output voltage with feedback control
- Adjustable dead-time control
- Current limiting and thermal shutdown protection
- Low standby current consumption
Application
- Switching power supplies
- DC-DC converters
- Battery chargers
- Voltage regulators
- Power inverters
- LED drivers
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.
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.
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