사양
| 속성 | 가치 |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Down, Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull |
| NumberofOutputs | 2 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 7V ~ 40V |
| Frequency-Switching | 1kHz ~ 300kHz |
| DutyCycle(Max) | 45% |
| SynchronousRectifier | No |
| 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 TL494CDR is a versatile pulse-width modulation (PWM) control circuit designed for power supply and motor control applications. Developed by Texas Instruments, it integrates the essential components necessary for a PWM control system, making it a popular choice for designers seeking to optimize power efficiency. The TL494CDR features an internal oscillator for frequency stability, two error amplifiers, a dead-time control comparator, a pulse-steering flip-flop, and an output control circuit.
This device allows for both voltage and current mode control, making it adaptable to various applications. The dual-output configuration can drive push-pull or single-ended circuits, and the adjustable dead-time control helps prevent overlapping output signals, reducing the risk of short circuits. The TL494CDR operates over a wide supply voltage range and offers thermal shutdown protection, enhancing reliability. Its compact design and comprehensive functionality make it suitable for use in switch-mode power supplies (SMPS), inverters, and DC-DC converters.
This device allows for both voltage and current mode control, making it adaptable to various applications. The dual-output configuration can drive push-pull or single-ended circuits, and the adjustable dead-time control helps prevent overlapping output signals, reducing the risk of short circuits. The TL494CDR operates over a wide supply voltage range and offers thermal shutdown protection, enhancing reliability. Its compact design and comprehensive functionality make it suitable for use in switch-mode power supplies (SMPS), inverters, and DC-DC converters.
Equivalent
The TL494CDR is a pulse-width modulation (PWM) controller IC. Equivalent products include the KA7500C, SG3524, and UC3842. These ICs offer similar PWM control functions and are widely used in various power supply and regulation applications. When considering an equivalent, ensure compatibility with your specific circuit requirements, such as voltage, frequency, and temperature range, as some parameters may differ slightly between models.
Features
The TL494CDR is a versatile pulse-width-modulation (PWM) control circuit that integrates the essential features required for high-performance switching power supplies. Key features include:
1. Dual Output Control: Supports both single-ended and push-pull configurations for flexibility in design.
2. Error Amplifiers: Two error amplifiers allow for voltage and current feedback, enhancing regulation and performance.
3. Adjustable Dead-Time Control: Provides the ability to set dead time between outputs, optimizing efficiency and preventing shoot-through.
4. On-Chip Oscillator: Features an internal oscillator with adjustable frequency, simplifying timing and synchronization.
5. Reference Voltage: Built-in 5V reference voltage ensures stable operation and reduces external component count.
6. Undervoltage Lockout: Protects the circuit by disabling output under low supply voltage conditions.
7. Short-Circuit Protection: Safeguards the device and the power supply from damage due to overcurrent conditions.
8. Wide Supply Voltage Range: Operates over a broad range, typically from 7V to 40V, enhancing compatibility with various systems.
These features make the TL494CDR suitable for applications such as DC-DC converters, inverters, and power management systems.
1. Dual Output Control: Supports both single-ended and push-pull configurations for flexibility in design.
2. Error Amplifiers: Two error amplifiers allow for voltage and current feedback, enhancing regulation and performance.
3. Adjustable Dead-Time Control: Provides the ability to set dead time between outputs, optimizing efficiency and preventing shoot-through.
4. On-Chip Oscillator: Features an internal oscillator with adjustable frequency, simplifying timing and synchronization.
5. Reference Voltage: Built-in 5V reference voltage ensures stable operation and reduces external component count.
6. Undervoltage Lockout: Protects the circuit by disabling output under low supply voltage conditions.
7. Short-Circuit Protection: Safeguards the device and the power supply from damage due to overcurrent conditions.
8. Wide Supply Voltage Range: Operates over a broad range, typically from 7V to 40V, enhancing compatibility with various systems.
These features make the TL494CDR suitable for applications such as DC-DC converters, inverters, and power management systems.
Pinout
The TL494CDR is a pulse-width modulation (PWM) controller integrated circuit (IC) commonly used in power supplies and motor control applications. It comes in a 16-pin configuration. Here is a brief overview of the pin functions:
1. Comp (Comparator Input): Non-inverting input for error amplifier.
2. FEEDBACK (Feedback Input): Inverting input for error amplifier.
3. DTC (Dead-Time Control): Adjusts dead-time interval between outputs.
4. C1 (Timing Capacitor): Connected to the timing capacitor for oscillation frequency.
5. R1 (Timing Resistor): Connected to the timing resistor for oscillation frequency.
6. C2 (Timing Capacitor): Another connection for timing purposes.
7. GND (Ground): Ground reference for the IC.
8. C3 (Capacitor 3): Additional timing configuration.
9. E1 (Error Amplifier Output): Output for error amplifier.
10. E2 (Error Amplifier Output): Additional error amplification.
11. Vc (Vcc): Positive supply voltage terminal.
12. GND (Ground): Another ground connection.
13. OUT (Output Control): Controls output switching.
14. RT (Reference Trim): Used for trimming reference voltage.
15. CT (Compensation): Used for frequency compensation.
16. VREF (Reference Voltage): Provides a stable reference voltage.
These pins collectively manage the PWM signal generation, feedback control, timing, and output regulation functions essential for efficient power management.
1. Comp (Comparator Input): Non-inverting input for error amplifier.
2. FEEDBACK (Feedback Input): Inverting input for error amplifier.
3. DTC (Dead-Time Control): Adjusts dead-time interval between outputs.
4. C1 (Timing Capacitor): Connected to the timing capacitor for oscillation frequency.
5. R1 (Timing Resistor): Connected to the timing resistor for oscillation frequency.
6. C2 (Timing Capacitor): Another connection for timing purposes.
7. GND (Ground): Ground reference for the IC.
8. C3 (Capacitor 3): Additional timing configuration.
9. E1 (Error Amplifier Output): Output for error amplifier.
10. E2 (Error Amplifier Output): Additional error amplification.
11. Vc (Vcc): Positive supply voltage terminal.
12. GND (Ground): Another ground connection.
13. OUT (Output Control): Controls output switching.
14. RT (Reference Trim): Used for trimming reference voltage.
15. CT (Compensation): Used for frequency compensation.
16. VREF (Reference Voltage): Provides a stable reference voltage.
These pins collectively manage the PWM signal generation, feedback control, timing, and output regulation functions essential for efficient power management.
Manufacturer
The TL494CDR is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of integrated circuits (ICs) and other electronic components. It is well-known for its analog and embedded processing products, which are used in various applications across different industries, including automotive, industrial, personal electronics, and communications. TI has a strong presence in the electronics industry and is recognized for its innovation and development of high-performance components.
Application
The TL494CDR is a versatile PWM (pulse-width modulation) controller used in various applications, primarily in power electronics. Key application areas include:
1. Switching Power Supplies: It is commonly used in designing DC-DC converters and AC-DC power supplies.
2. Motor Control: Effective for controlling DC motor speeds by regulating the voltage and current.
3. Battery Chargers: Utilized in smart chargers for efficient battery management.
4. Inverters: Employed in DC-AC inverter circuits for solar power systems.
5. Voltage Regulation: Provides reliable voltage stabilization in electronic circuits.
6. Lighting Control: Used in dimming circuits for LED lighting systems.
These applications benefit from the TL494CDR's adjustable PWM duty cycles, built-in error amplifiers, and precise control features.
1. Switching Power Supplies: It is commonly used in designing DC-DC converters and AC-DC power supplies.
2. Motor Control: Effective for controlling DC motor speeds by regulating the voltage and current.
3. Battery Chargers: Utilized in smart chargers for efficient battery management.
4. Inverters: Employed in DC-AC inverter circuits for solar power systems.
5. Voltage Regulation: Provides reliable voltage stabilization in electronic circuits.
6. Lighting Control: Used in dimming circuits for LED lighting systems.
These applications benefit from the TL494CDR's adjustable PWM duty cycles, built-in error amplifiers, and precise control features.
Package
The TL494CDR is a pulse-width-modulation (PWM) control circuit packaged in a SOIC-16 (Small Outline Integrated Circuit) form factor. This package type is compact and surface-mountable, ideal for space-constrained applications in electronic circuits.
