사양
| 속성 | 가치 |
| Package | Tube,Tube |
| Series | SWITCHMODE™ |
| ProductStatus | Obsolete |
| OutputType | Transistor Driver |
| Function | Step-Down, Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck, Push-Pull |
| NumberofOutputs | 2 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 7V ~ 40V |
| Frequency-Switching | 200kHz |
| DutyCycle(Max) | 48% |
| SynchronousRectifier | Yes |
| ClockSync | No |
| ControlFeatures | Dead Time Control, Frequency Control |
| OperatingTemperature | 0°C ~ 70°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 16-SOIC (0.154, 3.90mm Width) |
개요
Description
The TL494CD is a versatile pulse-width modulation (PWM) controller integrated circuit (IC) designed for power supply control applications. It is commonly used in switch-mode power supplies, inverters, and other DC-DC conversion systems. TL494CD integrates all the necessary control circuitry for a PWM controller, including an error amplifier, a voltage reference, a programmable oscillator, and a PWM comparator.
The device supports both voltage-mode and current-mode control techniques, making it adaptable for various applications. It features two error amplifiers for increased system flexibility and control precision. The TL494CD also includes a dead-time control input to adjust the amount of time the output transistors are turned off between cycles, preventing overlap and reducing stress on components.
The IC provides dual outputs that can be configured for either single-ended or push-pull operation, enhancing its versatility. Its low standby power consumption and high efficiency make it a popular choice in cost-effective power management solutions. The TL494CD is typically packaged in a standard 16-pin dual in-line package (DIP) or surface-mount technology (SMT) formats for easy integration into various circuit designs.
The device supports both voltage-mode and current-mode control techniques, making it adaptable for various applications. It features two error amplifiers for increased system flexibility and control precision. The TL494CD also includes a dead-time control input to adjust the amount of time the output transistors are turned off between cycles, preventing overlap and reducing stress on components.
The IC provides dual outputs that can be configured for either single-ended or push-pull operation, enhancing its versatility. Its low standby power consumption and high efficiency make it a popular choice in cost-effective power management solutions. The TL494CD is typically packaged in a standard 16-pin dual in-line package (DIP) or surface-mount technology (SMT) formats for easy integration into various circuit designs.
Equivalent
The TL494CD is a PWM controller commonly used in power supply circuits. Equivalent products include:
1. KA7500: A similar PWM controller with analogous features.
2. SG3524: Another PWM controller with comparable specifications.
3. UC3842: Offers similar PWM control but typically used in a wider range of applications.
4. LM494: A close alternative with equivalent functions.
These alternatives may differ slightly in specifications, packaging, or manufacturer support, so reviewing datasheets is recommended for compatibility.
1. KA7500: A similar PWM controller with analogous features.
2. SG3524: Another PWM controller with comparable specifications.
3. UC3842: Offers similar PWM control but typically used in a wider range of applications.
4. LM494: A close alternative with equivalent functions.
These alternatives may differ slightly in specifications, packaging, or manufacturer support, so reviewing datasheets is recommended for compatibility.
Features
The TL494CD is a PWM (Pulse Width Modulation) controller designed for DC-DC conversion applications. Key features include:
1. Dual Output Control: Capable of implementing both single-ended and push-pull configurations.
2. Precision Timing Control: Utilizes a precision oscillator to achieve a wide range of frequency outputs.
3. Error Amplifiers: Contains two independent error amplifiers for feedback control.
4. Dead-Time Control: Adjustable dead-time feature to prevent overlap in power switch conduction, enhancing efficiency and safety.
5. On-Chip Reference Voltage: Provides a stable 5V reference voltage with a tolerance of ±5%.
6. Under-Voltage Lockout: Ensures the PWM output is disabled under low supply voltage conditions to prevent damage.
7. Built-In Protection Features: Includes a shutdown feature to protect against overcurrent and overvoltage.
8. High Performance and Reliability: Suitable for a variety of power supply applications due to its robust design.
These features make the TL494CD versatile and efficient for controlling power supply systems.
1. Dual Output Control: Capable of implementing both single-ended and push-pull configurations.
2. Precision Timing Control: Utilizes a precision oscillator to achieve a wide range of frequency outputs.
3. Error Amplifiers: Contains two independent error amplifiers for feedback control.
4. Dead-Time Control: Adjustable dead-time feature to prevent overlap in power switch conduction, enhancing efficiency and safety.
5. On-Chip Reference Voltage: Provides a stable 5V reference voltage with a tolerance of ±5%.
6. Under-Voltage Lockout: Ensures the PWM output is disabled under low supply voltage conditions to prevent damage.
7. Built-In Protection Features: Includes a shutdown feature to protect against overcurrent and overvoltage.
8. High Performance and Reliability: Suitable for a variety of power supply applications due to its robust design.
These features make the TL494CD versatile and efficient for controlling power supply systems.
Pinout
The TL494CD is a pulse-width modulation (PWM) control IC used for power supply and motor control applications. It is commonly available in a 16-pin dual in-line package (DIP) or surface-mount package. Below is a concise description of its pin functions:
1. Comp1/Comp2: Inputs for the two error amplifiers.
2. Feedback (FB): Used for feedback from the output to the input.
3. Dead-Time Control (DTC): Adjusts the dead time between the outputs.
4. CT: Timing capacitor connection for the oscillator.
5. RT: Timing resistor connection for setting oscillator frequency.
6. GND: Ground reference.
7. C1/C2: Outputs used to drive the power switch.
8. VCC: Positive supply voltage.
9. Output Control: Selects push-pull or single-ended operation.
10. Reference Output: Provides a stable reference voltage.
11. NC: No connection, reserved for future use or not connected.
12. Vref: Provides a stable 5V reference output.
13. Oscillator: Frequency setting for the internal oscillator.
14. Shutdown: Disables the output stage when needed.
Understanding these pin functions is crucial for implementing the TL494CD in your design effectively.
1. Comp1/Comp2: Inputs for the two error amplifiers.
2. Feedback (FB): Used for feedback from the output to the input.
3. Dead-Time Control (DTC): Adjusts the dead time between the outputs.
4. CT: Timing capacitor connection for the oscillator.
5. RT: Timing resistor connection for setting oscillator frequency.
6. GND: Ground reference.
7. C1/C2: Outputs used to drive the power switch.
8. VCC: Positive supply voltage.
9. Output Control: Selects push-pull or single-ended operation.
10. Reference Output: Provides a stable reference voltage.
11. NC: No connection, reserved for future use or not connected.
12. Vref: Provides a stable 5V reference output.
13. Oscillator: Frequency setting for the internal oscillator.
14. Shutdown: Disables the output stage when needed.
Understanding these pin functions is crucial for implementing the TL494CD in your design effectively.
Manufacturer
The TL494CD is manufactured by Texas Instruments, an American technology company. Texas Instruments is one of the world's largest producers of semiconductors and is known for designing and manufacturing a range of integrated circuits, including analog, digital signal processing, and microcontroller chips. The company provides essential components for various electronic devices and systems, focusing on innovation and reliable solutions for industries such as consumer electronics, automotive, industrial, and communications.
Application
The TL494CD is a versatile PWM (Pulse Width Modulation) controller used in various applications. Its primary application areas include switch-mode power supplies (SMPS), where it regulates voltage and current efficiently. It is also used in DC-DC converters, offering precise output control. The TL494CD finds use in inverter circuits, battery chargers, and motor speed controllers, benefiting from its ability to manage power effectively. It supports push-pull and single-ended output configurations, making it adaptable for different design requirements in consumer electronics, automotive systems, and industrial equipment. Its reliability and flexibility make it a popular choice for many power management solutions.
Package
The TL494CD is a pulse-width modulation (PWM) controller IC available in the SOIC-16 (Small Outline Integrated Circuit) package type, which features 16 pins in a compact, surface-mount form factor suitable for automated assembly and applications with space constraints.
