Yüksek Verimli Buck Dönüştürücü

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TL494 Kullanan Yüksek Güçlü Yüksek Verimli Buck Dönüştürücü Devresi



Features of TL494 IC

• Complete PWM Power-Control Circuitry
• Uncommitted Outputs for 200-mA Sink or Source Current
• Output Control Selects Single-Ended or Push-Pull Operation
• Internal Circuitry Prohibits Double Pulse at Either Output
• Variable Dead Time Provides Control Over Total Range
• Internal Regulator Provides a Stable 5-V
• Reference Supply With 5% Tolerance
• Circuit Architecture Allows Easy Synchronization

Note! Most of the internal schematic and operations description is taken from the datasheet and modified to some extent for better understanding.

Components Required​

1. TL494 IC - 1
2. TIP2955 Transistor - 1
3. Screw Terminal 5mmx2 - 2
4. 1000uF,60V Capacitor - 1
5. 470uF,60V Capacitor - 1
6. 50K,1% Resistor - 1
7. 560R Resistor - 1
8. 10K,1% Resistor - 4
9. 3.3K,1% Resistor - 2
10. 330R Resistor - 1
11. 0.22uF Capacitor - 1
12. 5.6K,1W Resistor - 1
13. 12.1V Zener Diode - 1
14. MBR20100CT Schottky Diode - 1
15. 70uH (27 x 11 x 14 ) mm Inductor - 1
16. Potentiometer (10K) Trim-Pot - 1
17. 0.22R Current Sense Resistor - 2
18. Clad Board Generic 50x 50mm - 1
19. PSU Heat Sink Generic - 1
20. Jumper Wires Generic - 15

 

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Parts-List:

1. TL494 IC - 1
2. IRFP250 MOSFET - 1
3. Screw Terminal 5X2 mm - 2
4. 1000uF, 35V Capacitor - 1
5. 1000uF,63V Capacitor - 1
6. 50K, 1% Resistor - 1
7. 560R Resistor - 1
8. 10K,1% Resistor - 4
9. 3.3K, 1% Resistor - 1
10. 330R Resistor - 1
11. 0.1uF Capacitor - 1
12. MBR20100CT Schottky Diode - 1
13. 150uH (27 x 11 x 14) mm Inductor - 1
14. Potentiometer (10K) Trim Pot - 1
15. 0.22R Current Sense Resistor - 2
16. Clad Board Generic 50x 50mm - 1
17. PSU Heat Sink Generic - 1
18. Jumper Wires Generic - 15

 

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• IC TL494 PWM Controller - 1
• IRFZ44N MOSFET - 1
• 220 uH Inductor - 1
• LM358 Op-amp - 1
• MBR20100CT Diode - 1
• 5.08mm Screw Terminal - 2
• 1000uF,25V Capacitor - 2
• 1000uF,63V Capacitor - 1
• 2.2nF Capacitor - 1
• R560 Resistor - 2
• 2.2K Resistor, 1% - 2
• 4.7K, 1% Resistor - 1
• 10K, 1% Resistor - 6
• 50K Resistor - 1
• 10K Trim-Pot - 1
• Cladboard for PCB

 

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