High-Performance Current-Mode PWM Controller 8-SOIC -40 to 85 The TL2843BD-8 is a PWM controller IC manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** TL2843BD-8
- **Type:** Current-Mode PWM Controller
- **Topology:** Flyback, Forward, Boost, Buck
- **Operating Frequency:** Up to 500 kHz
- **Output Configuration:** Single-ended
- **Duty Cycle Max:** 50%
- **Supply Voltage (VCC):** 8.4V to 30V
- **Start-up Voltage:** 8.4V (typical)
- **Undervoltage Lockout (UVLO):** 7.9V (turn-off), 8.4V (turn-on)
- **Output Current (Source/Sink):** 200mA / 200mA
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SOIC-8
### **Descriptions:**
The TL2843BD-8 is a high-performance current-mode PWM controller designed for switching power supplies. It provides precise regulation with features like cycle-by-cycle current limiting, adjustable oscillator frequency, and soft-start capability. It is commonly used in offline and DC-DC converter applications.
### **Features:**
- **Current-Mode Control:** Improves loop response and simplifies compensation.
- **Adjustable Switching Frequency:** Up to 500 kHz.
- **Internal Trimmed Bandgap Reference:** 5V ±1% accuracy.
- **Cycle-by-Cycle Current Limiting:** Enhances system protection.
- **Soft-Start Function:** Reduces inrush current during startup.
- **Low Startup Current:** Typically 0.5mA.
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.
- **Wide Operating Temperature Range:** Suitable for industrial applications.
This information is sourced from TI's official documentation.
