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KA7500B
Product Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Mode PWM Controller
- Characteristics:
- Regulates the output voltage of power supplies
- Provides precise control over switching power supplies
- Offers protection features for overvoltage and undervoltage conditions
- Package: DIP-16 (Dual Inline Package with 16 pins)
- Essence: KA7500B is a voltage mode PWM controller designed to regulate the output voltage of power supplies efficiently.
- Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.
Specifications
- Input Voltage Range: 7V to 40V
- Output Voltage Range: 5V to 35V
- Operating Temperature Range: -25°C to +85°C
- Oscillator Frequency Range: 100kHz to 500kHz
- Maximum Duty Cycle: 50%
- Output Current: Up to 200mA
Detailed Pin Configuration
- COMP: Compensation pin for external error amplifier
- INV: Inverting input of the error amplifier
- VREF: Reference voltage input for the error amplifier
- GND: Ground reference for the IC
- CT: Timing capacitor pin for oscillator frequency control
- RT: Timing resistor pin for oscillator frequency control
- OSC: Oscillator output pin
- VCC: Positive supply voltage input
- FB: Feedback pin for regulating the output voltage
- OUTPUT: Output pin for driving external power MOSFET
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
Functional Features
- Precise voltage regulation through feedback control
- Overvoltage protection to prevent damage to the load
- Undervoltage lockout for safe operation during low input voltage conditions
- Soft start function to reduce inrush current during startup
- Error amplifier compensation for stability and accuracy
Advantages and Disadvantages
Advantages: - Efficient voltage regulation - Protection features enhance reliability - Wide input and output voltage range - Compact DIP-16 package for easy integration
Disadvantages: - Limited maximum duty cycle of 50% - Requires external components for complete power supply implementation
Working Principles
KA7500B operates on the principle of voltage mode control. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM signal. By adjusting the duty cycle, the output voltage is regulated.
Detailed Application Field Plans
KA7500B is commonly used in various applications, including: - Switching power supplies - Battery chargers - LED drivers - Inverters - Uninterruptible Power Supplies (UPS) - Industrial control systems
Detailed and Complete Alternative Models
Some alternative models that can be considered as alternatives to KA7500B are: - TL494 - UC3842 - SG3525 - IRS2153D - LM5039
These models offer similar functionality and can be used as replacements depending on specific requirements.
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Liste 10 perguntas e respostas comuns relacionadas à aplicação de KA7500B em soluções técnicas
Sure! Here are 10 common questions and answers related to the application of KA7500B in technical solutions:
Q: What is KA7500B? A: KA7500B is a pulse width modulation (PWM) controller IC commonly used in power supply applications.
Q: What is the operating voltage range of KA7500B? A: The operating voltage range of KA7500B is typically between 7V and 40V.
Q: What is the maximum output current that KA7500B can handle? A: KA7500B can handle a maximum output current of around 200mA.
Q: How does KA7500B control the output voltage? A: KA7500B controls the output voltage by adjusting the duty cycle of the PWM signal.
Q: Can KA7500B be used in both buck and boost converter configurations? A: Yes, KA7500B can be used in both buck and boost converter configurations.
Q: What is the frequency range of the PWM signal generated by KA7500B? A: The frequency range of the PWM signal generated by KA7500B is typically between 100Hz and 500kHz.
Q: Is KA7500B suitable for high-power applications? A: No, KA7500B is not suitable for high-power applications as it has a limited output current capability.
Q: Can KA7500B be used in battery charging circuits? A: Yes, KA7500B can be used in battery charging circuits by controlling the charging current and voltage.
Q: Does KA7500B have built-in protection features? A: Yes, KA7500B has built-in protection features such as overcurrent protection and thermal shutdown.
Q: Are there any application notes or reference designs available for KA7500B? A: Yes, the manufacturer of KA7500B provides application notes and reference designs that can help in implementing the IC in various technical solutions.
Please note that the answers provided here are general and may vary depending on specific applications and requirements.