仕様
| 属性 | 値 |
| Package / Case | Tube |
| Series | SWITCHMODE™ |
| Part Status | Obsolete |
| Output Type | Transistor Driver |
| Function | Step-Down, Step-Up/Step-Down |
| Output Configuration | Positive |
| Topology | Buck, Push-Pull |
| Number of Outputs | 2 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 7V ~ 40V |
| Frequency - Switching | 200kHz |
| Duty Cycle(Max) | 48% |
| Synchronous Rectifier | Yes |
| Clock Sync | No |
| Control Features | Dead Time Control, Frequency Control |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole |
概要
Description
The TL494IN is a versatile PWM (Pulse Width Modulation) controller integrated circuit (IC) commonly used in power electronics applications such as switch-mode power supplies, DC-DC converters, and other regulated power devices. Developed by Texas Instruments, this device is designed to provide high efficiency and flexibility in controlling the power output.
Key features of the TL494IN include dual error amplifiers, an adjustable oscillator, a dead-time control comparator, and a pulse-steering flip-flop, which facilitates both single-ended and push-pull operations. The IC operates over a wide supply voltage range and offers a stable reference voltage output, making it suitable for various power management tasks.
The TL494IN improves regulation accuracy and efficiency by incorporating error amplifiers that compare the feedback signal with a reference voltage, adjusting the duty cycle accordingly. Its wide operating temperature range and robust construction make it suitable for industrial and consumer electronics applications. Overall, the TL494IN provides a reliable and efficient solution for designing and managing PWM-based power systems.
Key features of the TL494IN include dual error amplifiers, an adjustable oscillator, a dead-time control comparator, and a pulse-steering flip-flop, which facilitates both single-ended and push-pull operations. The IC operates over a wide supply voltage range and offers a stable reference voltage output, making it suitable for various power management tasks.
The TL494IN improves regulation accuracy and efficiency by incorporating error amplifiers that compare the feedback signal with a reference voltage, adjusting the duty cycle accordingly. Its wide operating temperature range and robust construction make it suitable for industrial and consumer electronics applications. Overall, the TL494IN provides a reliable and efficient solution for designing and managing PWM-based power systems.
Equivalent
The TL494IN is a PWM control IC used in power supply applications. Equivalent products include the KA7500, UC3842, and SG3525, which are also PWM controllers but may have different specifications and features. When considering an equivalent, ensure that pin configuration and electrical characteristics meet the requirements of your particular application.
Features
The TL494IN is a versatile PWM (Pulse Width Modulation) controller IC commonly used for DC-DC converters and switch-mode power supplies. Key features include:
1. Dual PWM Outputs: It provides two PWM outputs that can be configured for either single-ended or push-pull operation.
2. Internal Circuitry: Contains error amplifiers, a dead-time control comparator, a pulse-steering flip-flop, a 5V reference voltage, an oscillator, and a PWM comparator, minimizing the need for external components.
3. Adjustable Output: Users can adjust the duty cycle of the PWM outputs for precise control over power delivery.
4. Oscillator: Features an internal oscillator frequency range of 1 kHz to 300 kHz, adjustable with external resistors and capacitors.
5. Dead-Time Control: Provides programmable dead-time, ensuring safe switching with minimal overlap.
6. Reference Voltage: Supplies a stable 5V reference output, aiding various applications.
7. Wide Supply Voltage: Operates over a range of 7V to 40V, making it suitable for various applications.
8. Protection Features: Includes built-in protection features like undervoltage lockout and overload protection.
The TL494IN is a reliable choice for efficient power management systems due to its flexibility and robust feature set.
1. Dual PWM Outputs: It provides two PWM outputs that can be configured for either single-ended or push-pull operation.
2. Internal Circuitry: Contains error amplifiers, a dead-time control comparator, a pulse-steering flip-flop, a 5V reference voltage, an oscillator, and a PWM comparator, minimizing the need for external components.
3. Adjustable Output: Users can adjust the duty cycle of the PWM outputs for precise control over power delivery.
4. Oscillator: Features an internal oscillator frequency range of 1 kHz to 300 kHz, adjustable with external resistors and capacitors.
5. Dead-Time Control: Provides programmable dead-time, ensuring safe switching with minimal overlap.
6. Reference Voltage: Supplies a stable 5V reference output, aiding various applications.
7. Wide Supply Voltage: Operates over a range of 7V to 40V, making it suitable for various applications.
8. Protection Features: Includes built-in protection features like undervoltage lockout and overload protection.
The TL494IN is a reliable choice for efficient power management systems due to its flexibility and robust feature set.
Pinout
The TL494IN is a versatile PWM (Pulse Width Modulation) controller IC used primarily for power supply and motor control applications. It is packaged in a 16-pin dual in-line package (DIP).
Here's a brief overview of its pin functions:
1. Pins 1 & 2 (C1 & C2): Dead-time control, used to set the dead time between the outputs.
2. Pins 3 & 4 (E1 & E2): Error amplifiers inverting inputs.
3. Pin 5: Feedback input, compares output voltage with a reference.
4. Pin 6: Voltage reference output.
5. Pin 7: Ground.
6. Pin 8: Collector of output transistor B.
7. Pin 9: Emitter of output transistor B.
8. Pin 10: Emitter of output transistor A.
9. Pin 11: Collector of output transistor A.
10. Pin 12: VCC, Power supply input.
11. Pin 13: Output control, sets single-ended or push-pull mode.
12. Pin 14: Reference voltage bypass.
13. Pin 15: Oscillator timing capacitor.
14. Pin 16: Oscillator timing resistor.
These pins allow the TL494IN to control the duty cycle of switching transistors, making it ideal for regulating voltage and controlling power levels.
Here's a brief overview of its pin functions:
1. Pins 1 & 2 (C1 & C2): Dead-time control, used to set the dead time between the outputs.
2. Pins 3 & 4 (E1 & E2): Error amplifiers inverting inputs.
3. Pin 5: Feedback input, compares output voltage with a reference.
4. Pin 6: Voltage reference output.
5. Pin 7: Ground.
6. Pin 8: Collector of output transistor B.
7. Pin 9: Emitter of output transistor B.
8. Pin 10: Emitter of output transistor A.
9. Pin 11: Collector of output transistor A.
10. Pin 12: VCC, Power supply input.
11. Pin 13: Output control, sets single-ended or push-pull mode.
12. Pin 14: Reference voltage bypass.
13. Pin 15: Oscillator timing capacitor.
14. Pin 16: Oscillator timing resistor.
These pins allow the TL494IN to control the duty cycle of switching transistors, making it ideal for regulating voltage and controlling power levels.
Manufacturer
The TL494IN is manufactured by Texas Instruments, a global semiconductor design and manufacturing company headquartered in Dallas, Texas. Texas Instruments is known for developing analog and embedded processing products. They provide a wide range of components used in various electronic devices, including power management chips, microcontrollers, and signal chain devices. The TL494IN itself is a pulse-width modulation (PWM) controller used in power supply and motor control applications.
Application
The TL494IN is a versatile PWM (Pulse Width Modulation) controller used in various applications. Its primary application areas include switch-mode power supplies (SMPS), voltage regulation, and motor control. It provides efficient power conversion and is ideal for use in DC-DC converters, inverters, and battery chargers. The TL494IN is also employed in power factor correction circuits and offers features like adjustable output control and protection mechanisms, making it suitable for use in uninterruptible power supplies (UPS), solar power systems, and other power management applications. Its flexibility and reliability make it a popular choice for designers looking to optimize power efficiency and performance in electronic devices.
Package
The TL494IN is a PWM controller IC that comes in a PDIP (Plastic Dual In-line Package) with 16 pins. This package type is commonly used for through-hole mounting on printed circuit boards.
