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TL494CD
IC REG CTRLR BCK/PSH-PULL 16SOIC
- Fabricant
- Mfr. Partie #TL494CD
- Paquet SOIC (D)-16
- Fiche de données
- En stock7270
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Spécifications
| 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) |
Vue d'ensemble
Description
Key features of the TL494CD include dual error amplifiers, an internal oscillator, a dead-time control comparator, a pulse-steering flip-flop, and a 5V reference regulator. These components allow for precise control of the output voltage and current. The IC supports both voltage-mode and current-mode control schemes, making it adaptable to various designs.
The TL494CD operates with a wide input voltage range and provides flexibility with an adjustable dead-time control, which helps prevent shoot-through conditions in the output stage. Its frequency of operation can be set by external timing components, typically a resistor and capacitor.
This IC is widely used in switch-mode power supplies (SMPS), DC-to-DC converters, inverters, and other applications where efficient power management is essential. Its reliability, ease of use, and cost-effectiveness make it a popular choice among engineers and designers.
Features
1. PWM Control: Provides pulse-width modulation for controlling power to loads, making it ideal for switch-mode power supplies.
2. Dual Output: It includes two outputs which can be used for push-pull or single-ended applications, enhancing flexibility.
3. Internal Reference: Has a precise 5V reference voltage to ensure stable and accurate operation.
4. Error Amplifiers: Two error amplifiers with common-mode input voltage range can be used for voltage regulation and feedback.
5. Adjustable Dead-Time Control: Allows the adjustment of the dead-time between switching outputs, crucial for optimizing efficiency and performance.
6. Built-In Oscillator: Features an internal oscillator with a frequency adjustable from 1 Hz to 300 kHz through external resistors and capacitors.
7. Undervoltage Lockout: Ensures stability by preventing operation at low supply voltages.
8. Short-Circuit Protection: Includes features for overcurrent and short-circuit protection to protect the circuit from damage.
9. Temperature Range: Designed to operate over a wide temperature range, enhancing reliability in various conditions.
These features make the TL494CD a robust choice for efficient power supply design and control systems.
Package
Pinout
1. Compensation: Stabilizes the feedback loop.
2. Feedback: Receives the feedback voltage for comparison.
3. Dead-Time Control: Adjusts the dead time between the two outputs.
4. CT (Timing Capacitor): Sets the oscillator frequency.
5. RT (Timing Resistor): Works with CT to set the oscillator frequency.
6. GND (Ground): Ground reference.
7. C1: Collector of the first internal transistor.
8. E1: Emitter of the first internal transistor.
9. E2: Emitter of the second internal transistor.
10. C2: Collector of the second internal transistor.
11. VCC: Power supply voltage.
12. Output Control: Selects between single-ended or push-pull output.
13. VREF: Provides a stable 5V reference output.
14. Error Amplifier Non-Inverting Input: Positive input for the error amplifier.
15. Error Amplifier Inverting Input: Negative input for the error amplifier.
16. Oscillator: Output of the internal oscillator.
These pins work together to control the PWM output based on feedback and timing configurations.
Manufacturer
Application
Equivalent
Expédition
Méthodes d'expéditionNous
offrir des services d'expédition mondiaux par DHL, FedEx, TNT, UPS ou tout autre expéditeur de votre choix.
Référence des frais d'expédition (DHL/FedEx):
DHL: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 2 à 5 jours ouvrables.
FedEx: Les frais d'expédition varient de 25 à 40 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.
UPS: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.
TNT: Les frais d'expédition varient de 25 à 65 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.
EMS: Les frais d'expédition varient de 30 à 50 $ (0,5 kg), avec un délai de livraison estimé de 7 à 15 jours ouvrables.
Courrier aérien enregistré: Le coût d'expédition est de 2 à 4 $ (0,1 kg), avec un délai de livraison estimé de 5 à 20 jours ouvrables.
Paiements
Payment Methods
Le terme de paiement est 100% prépayé.
Actuellement, nous n'acceptons que les méthodes de paiement ci-dessous:
1. PayPal
2. Carte de crédit/débit
3. Transfert bancaire
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