TL494 pin function diagram, TL494 typical application circuit diagram
12V ──┬── Q1 (top left) ──┬── Transformer ──┐ │ │ (12-0-12 to 220V) │── Q2 (top right) ─┘ │ └── Q3 (bot left) ──┬── GND Q4 (bot right) ─┘ TL494 Outputs: Pin 8 (C1) → Q1 gate via driver Pin 9 (E1) → GND Pin 11(C2) → Q2 gate via driver Pin 10(E2) → GND Q3 driven by inverted Q1, Q4 by inverted Q2 tl494 circuit diagram
The charger starts in constant current mode. When the battery reaches 14.4V, it switches to constant voltage mode automatically. The basic circuit diagram of a TL494 is shown below:
The TL494 circuit diagram consists of several external components that are connected to the IC to form a complete PWM control circuit. The basic circuit diagram of a TL494 is shown below: TL494 pin function diagram