KA3525A

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KA3525A

+物料清單

IC REG CTRLR 16DIP

  • 製造商安森美

  • 製造商部分 #KA3525A

  • 有存貨5920

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規格

屬性 價值
Part Status Obsolete
Base Product Number KA3525
Output Type Transistor Driver
Output Configuration Positive
Number of Outputs 2
Output Phases 1
Voltage - Supply (Vcc/Vdd) 7V ~ 20V
Frequency - Switching 60Hz ~ 430kHz
Duty Cycle (Max) 49%
Synchronous Rectifier Yes
Clock Sync Yes
Control Features Enable, Soft Start
Operating Temperature 0°C ~ 70°C (TA)
Mounting Type Through Hole
Package 16-DIP (0.300", 7.62mm)
Supplier Device Package 16-PDIP
Packaging Tube

概述

Description

The KA3525A is a pulse width modulation (PWM) control circuit primarily used for power supply and motor control applications. It integrates the necessary components for a complete PWM control system, including a voltage reference, error amplifier, oscillator, and PWM latch. The device operates in a fixed-frequency mode and can generate precise PWM signals to control the power delivered to a load.
Key features of the KA3525A include adjustable output frequency, a wide supply voltage range, and high current totem pole outputs, which provide the capability to drive N-channel MOSFETs or bipolar transistors directly. The circuit also includes built-in protections like under-voltage lockout, soft-start capability, and overload protection to ensure reliable and safe operation in various applications.
Its versatility makes the KA3525A suitable for use in DC-DC converters, inverters, and switch-mode power supplies. The device's robust design and functionality make it a popular choice for engineers seeking efficient power control solutions.

Equivalent

The KA3525A chip is a PWM controller commonly used in power supply and DC-DC converter applications. Equivalent or similar products include the SG3525A, UC3525A, TL494, and LM3525. These chips offer similar functionalities, such as pulse-width modulation control, and are often interchangeable in applications with minor circuit adjustments. Always check the datasheets to ensure compatibility with your specific application requirements.

Features

The KA3525A is a versatile PWM (Pulse Width Modulation) controller designed for efficient and flexible power supply regulation. Key features include:
1. PWM Control: Offers precise control of pulse width modulation, crucial for regulating power supply in various electronic devices.

2. Wide Input Voltage Range: Accommodates a broad range of input voltages, enhancing its applicability in different power supply designs.
3. High Output Current Capacity: Capable of delivering significant output current, making it suitable for driving power MOSFETs and bipolar transistors.
4. Built-in Error Amplifier: Includes an onboard error amplifier that facilitates accurate voltage regulation and feedback control.
5. Oscillator: Features an internal oscillator with adjustable frequency, allowing customization to specific application needs.
6. Soft Start Capability: Incorporates a soft start feature to prevent inrush current during power-up, enhancing device longevity.
7. Dead-Time Control: Includes adjustable dead-time control, optimizing the switching performance and improving efficiency.
8. Overcurrent Protection: Provides built-in protection against overcurrent conditions, safeguarding both the controller and the connected components.
9. Shutdown Function: Offers a shutdown capability for energy-saving and protective measures during fault conditions.
These features make the KA3525A ideal for power supply designs in consumer electronics, industrial applications, and more.

Pinout

The KA3525A is a pulse-width modulation (PWM) controller IC commonly used for power supply and motor control applications. It typically comes in a 16-pin dual in-line package (DIP). Here is a brief description of the pin functions:
1. Compensation (1): Connects to the output of the error amplifier for frequency compensation.
2. V_FF (2): Sets the shutdown threshold voltage with a resistor divider.
3. Soft Start (3): Controls the soft-start interval via an external capacitor.
4. Oscillator Output (4): Outputs the oscillator signal.
5. RT (5): Sets the oscillator frequency with an external resistor.
6. CT (6): Sets the oscillator frequency with an external capacitor.
7. Shutdown (7): Disables the output when activated.
8. Ground (8): Connects to the ground.
9. Emitter Output (9): Provides emitter output for driver transistors.
10. Collector Output (10): Provides collector output for driver transistors.
11. V_CC (11): Connects to the input supply voltage.
12. Output A (12): PWM output for driving the main power switch.
13. Output B (13): PWM output for driving the secondary power switch.
14. Reference Output (14): Provides a stable 5V reference voltage.
15. Non-inverting Input (15): Non-inverting input of the error amplifier.
16. Inverting Input (16): Inverting input of the error amplifier.
These pins support various functions like setting oscillator frequency, controlling soft start, and providing outputs for PWM switching.

Manufacturer

The KA3525A is a pulse width modulation (PWM) controller manufactured by ON Semiconductor. ON Semiconductor is a company that specializes in the design and manufacturing of semiconductor components used in a wide range of electronic devices and systems. They focus on energy-efficient solutions and products that support various markets, including automotive, industrial, communications, computing, and consumer electronics. The company provides a wide array of products, such as power management devices, sensors, logic, discrete components, and custom solutions. With a commitment to innovation and technology advancement, ON Semiconductor plays a significant role in the semiconductor industry.

Application

The KA3525A is a pulse width modulation (PWM) controller commonly used in power electronics applications. Its main application areas include:
1. Switching Power Supplies: Used for regulating output voltage in AC/DC and DC/DC converters.
2. Motor Control: Employed in controlling speed and torque in DC motor drives.
3. Inverters: Utilized in applications requiring conversion of DC to AC power, such as in solar inverters.
4. Battery Chargers: Helps in managing charging protocols for various battery chemistries.
5. Lighting Control: Applied in dimmers and other lighting control systems to regulate brightness effectively.
Its ability to provide precise control makes it suitable for these applications.

Package

The KA3525A is typically available in Dual In-line Package (DIP) and Surface-Mount Device (SMD) package types. The DIP version commonly has a 16-pin configuration, while the SMD version might be available in a Small Outline Integrated Circuit (SOIC) package with a similar pin count. These packages are suited for different mounting techniques in electronic circuits.

Frequently Asked Questions


Q: What is the maximum supply voltage for the KA3525A?
A: The device operates with a supply voltage (Vcc) ranging from 7V to 20V.


Q: Does the KA3525A support synchronous rectification?
A: Yes, it includes a built-in synchronous rectifier feature for improved efficiency.


Q: What is the maximum duty cycle of this PWM controller?
A: The maximum duty cycle is 49%, typical for push-pull or half-bridge topologies.


Q: Can the switching frequency be adjusted externally?
A: Yes, the switching frequency is adjustable from 60Hz to 430kHz via external timing components.


Q: What control features are included in the KA3525A?
A: It includes enable and soft-start functions for controlled power-up sequences.


Q: Is the KA3525A suitable for through-hole PCB assembly?
A: Yes, it comes in a 16-pin DIP package (16-PDIP) for through-hole mounting.


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