Abbildungen dienen nur als Referenz
TL494CD
+StücklisteIC REG CTRLR BCK/PSH-PULL 16SOIC
-
HerstellerOnsemi
-
Herstellerteil #TL494CD
-
Paket SOIC-16
-
Auf Lager6002
365 Tage Qualitätsgarantie
7*24 Stunden-Servicegarantie
90-Tage Kundendienstgarantie
Originalproduktgarantie
Spezifikationen
| Attribut | Wert |
| 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) |
Übersicht
Description
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
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
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
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.