High-Performance Current-Mode PWM Controller 14-SOIC 0 to 70 The TL3843BDRG4 is a current-mode PWM controller manufactured by Texas Instruments (TI). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** TL3843BDRG4
- **Package:** SOIC-8
- **Type:** Current-Mode PWM Controller
- **Topology:** Flyback, Forward, Boost, Buck
- **Input Voltage (VCC):** 7.6V to 30V
- **Output Voltage:** Adjustable via external components
- **Switching Frequency:** Up to 500kHz
- **Duty Cycle Range:** 0% to 100%
- **Operating Temperature Range:** -40°C to +85°C
- **Output Current (Source/Sink):** 200mA (Peak)
- **UVLO (Undervoltage Lockout):** 7.6V (On), 7.2V (Off)
- **Error Amplifier Bandwidth:** 1MHz (Typical)
### **Descriptions:**
- The TL3843BDRG4 is a high-performance PWM controller designed for DC-DC converter applications.
- It operates in current-mode control, providing improved loop response and simplified compensation.
- The device includes an onboard error amplifier, oscillator, PWM comparator, and totem-pole output driver.
- It is widely used in power supply designs, including offline and isolated converters.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.
- **Adjustable Frequency:** Allows optimization for efficiency and component size.
- **Precision Reference:** 5V ±1% bandgap reference for stable regulation.
- **Soft-Start Capability:** Reduces inrush current during startup.
- **Cycle-by-Cycle Current Limiting:** Protects against overload conditions.
- **Low Startup Current:** Typically 0.5mA, reducing power dissipation.
- **Totem-Pole Output:** Capable of driving power MOSFETs directly.
- **Wide Supply Voltage Range:** Supports operation from 7.6V to 30V.
This information is based solely on the manufacturer's datasheet and technical documentation.
