High-Performance Current-Mode PWM Controller The TL3844B is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Input Voltage Range:** 8.5V to 30V
- **Operating Frequency Range:** Up to 500kHz
- **Output Duty Cycle Range:** 0% to 100%
- **Peak Output Current:** ±1A (sink/source)
- **Reference Voltage:** 5V ±1% (trimmed)
- **Error Amplifier Bandwidth:** 3MHz
- **Current Sense Comparator Response Time:** 100ns
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
- The TL3844B is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converter applications.
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.
- The device includes an undervoltage lockout (UVLO) feature to ensure proper startup and shutdown.
- It is commonly used in power supply designs such as flyback, forward, and boost converters.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.
- **Adjustable Oscillator Frequency:** Allows flexibility in design with external timing components.
- **Undervoltage Lockout (UVLO):** Ensures reliable operation by preventing startup below the minimum supply voltage.
- **Soft-Start Capability:** Reduces inrush current during startup.
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection against overcurrent conditions.
- **Totem Pole Output:** Supports high-current gate drive for power MOSFETs.
- **Low Startup Current:** Typically 0.5mA, minimizing power consumption during startup.
The TL3844B is available in an 8-pin PDIP or SOIC package.
For detailed datasheets and application notes, refer to Texas Instruments' official documentation.
