Current-Mode PWM Controller The TL3843D-8 is a current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Topology:** Current-mode PWM controller
- **Input Voltage Range (VCC):** 8.5V to 30V (start-up), 7.6V to 30V (operating)
- **Output Frequency:** Up to 500 kHz (adjustable with external components)
- **Duty Cycle Range:** 0% to 100%
- **Output Current (Peak):** ±1A (sink/source)
- **Reference Voltage:** 5V ±1% (internal precision reference)
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 8-pin SOIC (D)
### **Descriptions:**
- The TL3843D-8 is designed for DC-DC converter applications, providing high-performance pulse-width modulation (PWM) control.
- It features current-mode operation for improved loop response and simplified feedback compensation.
- Includes an undervoltage lockout (UVLO) function to ensure proper start-up and shutdown.
- Suitable for flyback, forward, and boost converter topologies.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.
- **Undervoltage Lockout (UVLO):** Ensures reliable operation under low input voltage conditions.
- **Precision 5V Reference:** Provides stable voltage for feedback networks.
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.
- **Low Start-Up Current:** Typically 0.5 mA for efficient power-up.
- **Cycle-by-Cycle Current Limiting:** Protects against overload conditions.
This information is strictly factual based on TI's datasheet for the TL3843D-8.
