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Pulse-Width-Modulation Control Circui
395
ic
The TL594 is a fixed-frequency pulse-width-modulation (PWM) control circuit used in switching power supplies, providing modulation based on sawtooth waveforms and enabling output transistors during specific times.
In stock
Specifications
8- Operating Voltage
- 7 V to 40 V
- Supply Current
- 12.4 mA (DTC = 2 V)
- Interface
- PWM, Comparator, Error Amplifiers
- Resolution
- Not specified
- Range
- 0.47 µF to 10 kΩ for CT, 1.8 kΩ to 500 kΩ for RT
- Accuracy
- ±1% initial accuracy, ±25 mV over input voltage range of 7 V to 40 V
- Temperature Range
- 0°C to 70°C for amplifier, –65°C to 85°C for storage
- Package
- 16-Pin SOIC, PDIP, SO, or TSSOP
Pinout
16| 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 | GPIO | Collector terminal of BJT output 1 |
| 9 | E1 | GPIO | Emitter terminal of BJT output 1 |
| 10 | E2 | GPIO | Emitter terminal of BJT output 2 |
| 11 | C2 | GPIO | 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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