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Pulse-Width-Modulation Control Circui
395
ic
The TL594 is a PWM control circuit designed for power supply applications, featuring error amplifiers, an oscillator, and output transistors.
In stock
Specifications
8- Operating Voltage
- 7 V to 40 V
- Supply Current
- 12.4 mA (DTC = 2 V) mA
- Interface
- GPIO, ADC, PWM
- Resolution
- 100 Hz/kHz (frequency change with temperature) /kHz
- Range
- 0.45 to 1 V (maximum duty cycle, each output)
- Accuracy
- -2% to -1% (hysteresis) %
- Temperature Range
- 0°C to 70°C (TL594C) / -40°C to 85°C (TL594I)
- Package
- SOIC, PDIP, SO, TSSOP
Pinout
16Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | 1IN+ | GPIO | Noninverting input to error amplifier 1 |
| 2 | 1IN– | GPIO | Inverting input to error amplifier 1 |
| 3 | FEEDBACK | GPIO | Input pin for feedback |
| 4 | DTC | GPIO | Dead-time control comparator input |
| 5 | CT | — | Capacitor terminal used to set oscillator frequency |
| 6 | RT | — | Resistor terminal used to set oscillator frequency |
| 7 | GND | GND | Ground |
| 8 | C1 | — | Collector terminal of BJT output 1 |
| 9 | E1 | — | Emitter terminal of BJT output 1 |
| 10 | E2 | — | Emitter terminal of BJT output 2 |
| 11 | C2 | — | Collector terminal of BJT output 2 |
| 12 | VCC | POWER | Positive supply |
| 13 | OUTPUT CTRL | GPIO | Selects single-ended, parallel output, or push-pull operation |
| 14 | REF | POWER | 5-V reference regulator output |
| 15 | 2IN– | GPIO | Inverting input to error amplifier 2 |
| 16 | 2IN+ | GPIO | Noninverting input to error amplifier 2 |
Interactive pinout
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