: Pin 4 provides a way to set a minimum "off-time" between pulses to prevent overlap in push-pull stages.
The TL494 is a 16-pin IC designed for versatility. Unlike simpler PWM chips, it contains dual error amplifiers and flexible output stages that can drive anything from small BJTs to large MOSFETs in push-pull or single-ended modes. Key Pin Definitions Pin 1 & 2 (1-IN+, 1-IN-):
TL494 Pulse-Width-Modulation Control Circuits datasheet (Rev. I) tl494 circuit diagram
+12V ──┬────────────────────┐ │ │ ┌┴┐ │ │ │ 10k │ └┬┘ │ │ │ └──────┬─────────────┼─── VCC (pin 12) │ │ 0.1µF │ │ │ GND │ │ +12V ────┬──────────────────┤ │ │ ┌┴┐ 1N5819 │ │ │ (Schottky) │ └┬┘ │ │ │ └────┐ │ │ │ │ └─────┐ │ │ │ │ │ L1 ─┴─ │ 10µH ─┬─ │ │ │ │ │ C2 │ │ 100µF │ │ │ │ │ GND │ │ │ └─────┬──────┘ │ Vout (5V)
The TL494 is typically housed in a 16-pin DIP or SOIC package. Understanding its pin configuration is essential for designing any : : Pin 4 provides a way to set
: These allow for precise control of both voltage and current simultaneously, which is essential for stable battery charging or motor control.
The circuit diagram can be divided into several sections: Key Pin Definitions Pin 1 & 2 (1-IN+,
: Accepts a wide range of DC input, typically between 7V and 40V.