KA7500CD

Product Overview

Category

The KA7500CD belongs to the category of integrated circuits (ICs).

Use

It is primarily used as a pulse width modulation (PWM) controller.

Characteristics

• The KA7500CD is a versatile and highly efficient PWM controller.
• It operates over a wide range of input voltages, making it suitable for various applications.
• This IC offers precise control over the duty cycle of the output waveform.
• It has built-in protection features such as overvoltage and undervoltage lockout.

Package

The KA7500CD is available in a standard 16-pin dual in-line package (DIP).

Essence

The essence of the KA7500CD lies in its ability to regulate the width of pulses in a PWM signal, enabling efficient power management in electronic systems.

Packaging/Quantity

The KA7500CD is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 8V to 35V
• Output Voltage Range: 0V to Vcc
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 1kHz to 300kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. Vref: Reference voltage input
2. Ipk: Peak current sense input
3. Comp: Error amplifier output
4. FB: Feedback voltage input
5. Isense: Current sense input
6. Gnd: Ground
7. Vcc: Power supply input
8. Ct: Timing capacitor
9. Rt: Timing resistor
10. Discharge: Discharge pin
11. Sync: Synchronization input
12. Osc: Oscillator timing capacitor
13. Out: Output
14. Deadtime: Deadtime control
15. Vcc: Power supply input
16. Vref: Reference voltage input

Functional Features

• Precise duty cycle control for efficient power management.
• Error amplifier with adjustable gain for accurate feedback control.
• Overvoltage and undervoltage lockout protection.
• Synchronization capability for multi-unit operation.
• Deadtime control to prevent shoot-through in bridge circuits.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• High efficiency due to precise PWM control.
• Built-in protection features enhance system reliability.
• Synchronization capability enables synchronized operation of multiple units.

Disadvantages

• Limited output voltage range (0V to Vcc).
• Requires external components for timing and feedback control.

Working Principles

The KA7500CD operates by comparing a reference voltage (Vref) with a feedback voltage (FB) to generate a PWM signal. The duty cycle of the PWM signal is adjusted based on the error between these voltages, allowing precise control over the output waveform. By modulating the width of pulses, the KA7500CD efficiently regulates power delivery to connected loads.

Detailed Application Field Plans

The KA7500CD finds extensive use in various applications, including: 1. Switching power supplies 2. DC-DC converters 3. Uninterruptible power supplies (UPS) 4. Motor speed control 5. Lighting systems 6. Battery chargers

Detailed and Complete Alternative Models

1. TL494CN: Similar PWM controller with adjustable frequency and deadtime control.
2. UC3842AN: PWM controller with integrated high-voltage startup circuitry.
3. SG3525AN: PWM controller with dual outputs and adjustable deadtime control.
4. IRS2153D: Integrated half-bridge driver and PWM controller.

These alternative models offer similar functionality and can be considered as substitutes for the KA7500CD in various applications.

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