Pulse-Width-Modulation (Pwm) Control Circuit The TL494MJB is a pulse-width modulation (PWM) controller IC manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** TL494MJB
- **Type:** PWM Controller
- **Package:** 16-CDIP (Ceramic Dual In-Line Package)
- **Operating Temperature Range:** -55°C to +125°C
- **Supply Voltage (VCC):** 7V to 40V
- **Output Current (Sink/Source):** 200mA (per output)
- **Switching Frequency:** Up to 300kHz
- **Duty Cycle Range:** Adjustable from 0% to 100%
- **Number of Outputs:** 2 (Push-Pull or Single-Ended)
- **Error Amplifier Bandwidth:** 1MHz (Typical)
- **Reference Voltage:** 5V (±1%)
### **Descriptions:**
- The TL494MJB is a fixed-frequency PWM control circuit designed for power supply regulation.
- It includes an on-chip oscillator, error amplifiers, a dead-time control comparator, and output control circuitry.
- Suitable for switch-mode power supply (SMPS) applications, DC-DC converters, and motor control.
- The ceramic package (CDIP) ensures high reliability in harsh environments.
### **Features:**
- **Complete PWM Control:** Includes all necessary functions for PWM generation.
- **Adjustable Dead-Time Control:** Prevents shoot-through in push-pull configurations.
- **Internal Oscillator:** Allows for frequency adjustment via external components.
- **Dual Error Amplifiers:** Enables voltage and current feedback control.
- **Output Control Options:** Selectable single-ended or push-pull operation.
- **Undervoltage Lockout (UVLO):** Ensures proper operation within specified voltage range.
- **High-Current Totem-Pole Outputs:** Directly drives power MOSFETs or bipolar transistors.
This information is based on the manufacturer's datasheet and technical documentation.
