TL494

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TL494

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  • ПроизводительОнсеми

  • Мфр. Часть #TL494

  • В наличии22174

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Спецификации

Атрибут Ценность
Packaging Reel
StandardPackQty 2500

Обзор

Description

The TL494 is a versatile pulse-width modulation (PWM) control circuit often used in power supply and voltage regulation applications. Developed by Texas Instruments, it integrates all the necessary functions required for the design of a PWM control circuit. The TL494 includes a pair of error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, a pulse-steering control flip-flop, and a 5V reference regulator.
Key features include a wide supply voltage range (7V to 40V), adjustable dead-time control, and the capability to operate in both single-ended and push-pull configurations. The device's flexibility is enhanced through its adjustable reference voltage and error amplifier, which allow precise control over the output voltage. The TL494 is particularly favored for its reliability and ease of integration in switch-mode power supply (SMPS) designs, DC-DC converters, and other power management systems.
In summary, the TL494 simplifies the design of power control circuits, making it a staple in electronics that require efficient power regulation and conversion.

Equivalent

The TL494 is a versatile PWM controller used in power supply applications. Equivalent products include the KA7500 and LM494, both of which offer similar features and functionalities. These ICs are used for pulse-width modulation control in various power management applications. Always check datasheets for pin compatibility and specific application requirements when considering substitutes.

Features

The TL494 is a versatile PWM (Pulse Width Modulation) controller used in power supply and DC-DC converter applications. Key features include:
1. Dual Output Control: It provides two independently controlled outputs, suitable for push-pull, half-bridge, or full-bridge configurations.

2. Built-in Error Amplifiers: Two error amplifiers with common-mode input voltage range near ground, allowing flexibility in control configurations.
3. Adjustable Dead Time: Offers a dead-time control input to prevent overlap in driving signals, enhancing efficiency and reducing cross-conduction.
4. Oscillator Circuit: Features an internal oscillator that can be synchronized with external signals, with frequency set by external timing components.
5. Voltage Reference: Includes a 5V reference voltage source with tight regulation for stable operation.
6. Under-Voltage Lockout (UVLO): Provides protection by disabling the outputs when supply voltage is too low.
7. Low Standby Current: Ensures energy efficiency, particularly in battery-powered applications.
8. Wide Supply Voltage Range: Operates from 7V to 40V, allowing for use in various power supply designs.
These features make the TL494 a popular choice for designing reliable and efficient power management systems.

Pinout

The TL494 is a versatile PWM (Pulse Width Modulation) controller IC commonly used in switch-mode power supplies and other power control applications. It has a 16-pin dual in-line package (DIP) with the following pin functions:
1. Non-inverting Input of Error Amplifier 1
2. Inverting Input of Error Amplifier 1
3. Non-inverting Input of Error Amplifier 2
4. Inverting Input of Error Amplifier 2
5. Feedback
6. DTC (Dead-Time Control)
7. CT (Timing Capacitor)
8. RT (Timing Resistor)
9. GND (Ground)
10. C1 (Collector of Output Transistor 1)
11. E1 (Emitter of Output Transistor 1)
12. E2 (Emitter of Output Transistor 2)
13. C2 (Collector of Output Transistor 2)
14. VCC (Supply Voltage)
15. VC (Output Control)
16. Vref (Reference Voltage)
The TL494 integrates features such as error amplifiers, a PWM comparator, and an oscillator, making it suitable for controlling the duty cycle of the PWM output to regulate power effectively.

Manufacturer

The TL494 is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and produces a broad range of electronic components, including integrated circuits (ICs) used in various applications such as power management, analog and embedded processing, and more. The company is well-known for its innovation in the electronics industry, offering products that serve sectors like automotive, industrial, consumer electronics, and communications. Texas Instruments has a reputation for quality and reliability in its semiconductor products, and it provides extensive technical support and documentation for its ICs, including the TL494, which is commonly used in switch-mode power supply applications.

Application

The TL494 is a versatile PWM (Pulse Width Modulation) controller used primarily in power supply applications. Key areas include:
1. Switching Power Supplies: Used for controlling DC-DC converters and stabilizing output voltage.
2. Inverters: Employed in power inverters to manage the conversion from DC to AC.
3. Motor Control: Facilitates precise speed control in DC motor applications.
4. Battery Chargers: Utilized for efficient and controlled battery charging systems.
5. Voltage Regulation: Ensures consistent voltage levels in various electronic devices.
Its flexibility, reliability, and wide input voltage range make it suitable for numerous power management applications.

Package

The TL494 is typically available in dual in-line package (DIP) and surface-mount device (SMD) configurations, such as 16-pin PDIP, SOIC, and TSSOP packages. These packages accommodate the integrated circuit's functionality for pulse-width modulation (PWM) control applications.

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