TL494 Pulse-Width-Modulation Control Circuit
Fixed-frequency pulse-width-modulation (PWM) control circuit designed primarily for power supply control. Incorporates two error amplifiers, an on-chip adjustable oscillator, dead-time control (DTC) comparator, pulse-steering flip-flop, 5.0V precision regulator, and output control circuits.
Aliase:TL494CN, TL494IN, KA7500, SMPS PWM Controller, Inverter Controller
DIP-16 Top View
16 Pins
Pin-Tabelle16
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | 1IN+ | Analog | Error Amplifier 1 Non-Inverting Input |
| 2 | 1IN- | Analog | Error Amplifier 1 Inverting Input |
| 3 | FEEDBACK | Analog | Feedback Input / PWM Comparator Input & Error Amp Output |
| 4 | DTC | Analog | Dead-Time Control Input (0V = Max Duty Cycle, 3.3V = 0%) |
| 5 | CT | Analog | Oscillator Timing Capacitor |
| 6 | RT | Analog | Oscillator Timing Resistor |
| 7 | GND | Ground | Ground Connection (0V) |
| 8 | C1 | Digital | Output Transistor 1 Collector |
| 9 | E1 | Digital | Output Transistor 1 Emitter |
| 10 | E2 | Digital | Output Transistor 2 Emitter |
| 11 | C2 | Digital | Output Transistor 2 Collector |
| 12 | VCC | Power | Positive Power Supply (+7V to +40V) |
| 13 | OUTPUT_CTRL | Digital | Output Mode Control (GND = Parallel/Single-Ended, VREF = Push-Pull) |
| 14 | VREF | Power | Internal 5.0V Precision Reference Output (Up to 10mA) |
| 15 | 2IN- | Analog | Error Amplifier 2 Inverting Input |
| 16 | 2IN+ | Analog | Error Amplifier 2 Non-Inverting Input |